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SPREAD SPECTRUM

Subclass of:

375 - Pulse or digital communications

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
375140000 Direct sequence 807
375132000 Frequency hopping 284
375138000 Time hopping 20
375139000 Chirp 20
375131000 Hybrid form 11
Entries
DocumentTitleDate
20090074031SPREAD SPECTRUM RADAR APPARATUS - It is an object of the present invention to prevent the sensitivity of radar apparatus from falling. A spread spectrum radar apparatus which detects an object, includes a carrier wave oscillator which generates a carrier wave, transmission unit which transmits a spread signal which is the carrier wave spread using a first PN code, an intermediate demodulated signal generating unit which receives a reflected wave which is the spread signal reflected from the object, and despreads the reflected wave using a delayed second PN code that has a cyclically reversed logical value of the first PN code, to generate an intermediate demodulated signal, a low-pass filter through which a specific frequency component of the intermediate demodulated signal passes, and a sampling unit which samples an output signal from the low-pass filter, and the sampling unit samples the output signal in synchronization with the cycle of the reversal.03-19-2009
20100054304Enhanced system and method for detecting the leading edge of a waveform - The present invention is an improved system and method for detecting the leading edge of a waveform. More specifically, the invention relates to detecting the leading edge of an ultra wideband waveform. The invention requires locking to the ultra wideband waveform at a lock reference time, and sampling the ultra wideband waveform during one or more time windows relative to the lock reference time to identify one or more leading edge candidate times based on one or more detection criterion. The ultra wideband signal is sampled at a band limited Nyquist rate that avoids aliasing within a band of interest of the ultra wideband waveform, but allows aliasing outside of the band of interest to minimize the number of samples for leading edge detection processing.03-04-2010
20100014560Methods of synchronizing with first multipath component in ultra wideband receiver and ultra wideband receivers using the same - A synchronization method in a Ultra Wideband (UWB) receiver includes receiving a signal through a multipath channel, and synchronizing with a first multipath component of the received signal by computing a correlation value between the received signal and a template signal of the receiver in a predetermined search range. Since multipath components received at the receiver after the first multipath component of the received signal have lower power than that of the first multipath component, the synchronization with the first multipath component of the received signal may improve the performance in processes after the synchronization process.01-21-2010
20090041087WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - Transmission data spread over a frequency domain and a time domain is efficiently received. When a spread signal is received, if the SNR exceeds a predetermined value, it is determined that a despreading process is not necessary for all blocks, and a block selection flow is started. If a block having a channel estimation result indicating that a decoding process is possible without despreading is present, only that block is subjected to the decoding process, and despreading processes over the frequency domain and time domain are terminated. Moreover, when decoding is performed by despreading only some of the blocks, the despreading process over the frequency domain is preferentially performed so as to efficiently terminate FFT with regard to the spread signal over the time domain for which despreading is not performed.02-12-2009
20090074030Method of Characterizing Parameters and Removing Spectral Components of a Spread Spectrum Clock in a Communications Signal - Parameters of a spread spectrum clock signal in a communication signal are characterized by acquiring voltage samples of the communication signal at a nominal time location of an edge of the communication signal. The voltage samples are converted to time samples and the difference between the maximum and minimum time values is determined at the nominal time location. A spread spectrum clock magnitude number is generated by dividing the difference between the maximum and minimum time values by the nominal time location of the acquired voltage samples of the spread spectrum clock signal. A spread spectrum modulation profile of a spread spectrum clock signal is estimated by over sampling the time samples using an aliased index value to generate over sampled triangular waveforms representing the spread spectrum clock modulation profile. One of the over sampled triangular waveforms is use to generate the spread spectrum clock modulation profile.03-19-2009
20100118917AUTOMATIC GAIN CONTROL APPARATUS AND METHOD USING EFFECTIVE RECEIVING STRUCTURE OF IMPULSE RADIO ULTRA-WIDE BAND WIRELESS COMMUNICATION SYSTEM - Provided are an automatic gain control (AGC) apparatus using an efficient receiving structure of an impulse signal-based ultra wideband wireless communication system, and a method thereof. An AGC apparatus of an impulse signal-based wireless communication system guarantees an SNR received through an analog circuit unit, outputs correlation values with respect to an impulse preamble of the received signal, outputs the maximum value of the correlation values for each symbol among the correlation values, or divides a symbol period into a plurality of groups and obtains average values through a sum of each group to output the maximum value thereof.05-13-2010
20100158075Removal of modulated tonal interference - In some embodiments a phase between a periodic spreading signal and an effective spreading signal modulating an interfering harmonic is determined, an amplitude of the interfering harmonic is estimated, and the interfering harmonic is canceled from a received signal. Other embodiments are described and claimed.06-24-2010
20100074302METHOD AND GENERATOR FOR GENERATING A SPREAD-SPECTRUM SIGNAL - A method of generating a spread-spectrum signal in a navigation system comprises the steps of providing a carrier wave and a modulation waveform and modulating the carrier wave with the modulation waveform. The modulation waveform comprises a so-called anti-phase linear combination of a BOC(1,1) waveform and a BOC(m,1) waveform, expressible as α·BOC(1,1)−β·BOC(m,1), where m represents an even integer number, α and β are non-zero coefficients of the same sign, indicating the relative power split between the BOC(1,1) waveform and the BOC(m,1) waveform.03-25-2010
20100074300 METHOD FOR SIMPLIFYING THE CALCULATIONS FOR PRE-WHITENING IN A G-RAKE RECEIVER - A method for simplifying calculations for pre-whitening in a G-RAKE receiver, comprising receiving at least two signals with at least two antennas via a channel, where each one of said received signals comprises time delayed and attenuated versions of the original signals. Each received signal forms a corresponding vector of received signal versions and the vectors form a matrix of received signals, where, due to correlation between the antennas, the received signals are correlated. Each version also comprises a certain amount of colored noise. The correlating effect of the antennas is estimated and formulated in matrix form and used to acquire essentially uncorrelated received signal vectors in an essentially uncorrelated received signal matrix. A calculated inverse of a covariance matrix of the calculated essentially uncorrelated signal vectors is used to pre-whiten the noise. A G-RAKE receiver arranged for applying the method above.03-25-2010
20130039385CLOCK GENERATING CIRCUIT, TRANSCEIVER AND RELATED METHOD - A clock generating circuit includes: a phase detector for detecting a phase difference between an input clock and a reference clock to generate a control signal corresponding to the phase difference; a controllable oscillator for generating a plurality of output clocks according to the control signal, wherein the plurality of output clocks correspond to an oscillating frequency and correspond to a plurality of different phases respectively; a phase selector for selecting an output clock as a feedback clock from the plurality of output clocks according to a phase select signal; a feedback circuit for generating the input clock according to the feedback clock; and a phase difference comparator for comparing the plurality of phases corresponding to the plurality of output clocks respectively with a data phase of a data signal to generate a compared result, and generating the phase select signal according to the compared result.02-14-2013
20100046581ULTRA-WIDEBAND PULSE GENERATOR AND METHOD THEREOF - Provided is an ultra-wideband pulse generator using a digital scheme. The ultra-wideband pulse generator and a method for generating an ultra-wideband pulse therein can easily generate various ultra-wideband pulses having a random center frequency and bandwidth according to digital control schemes in a pulse-based ultra-wideband wireless communication system. The ultra-wideband pulse generator includes: a pulse waveform converting block for converting digital pulse waveform information on a desired ultra-wideband pulse into pulse waveform information having positive and negative signs; an unit pulse generating block for multiplying the converted pulse waveform information by a preset short-width pulse and amplifying the resulting pulses according to gain information of the desired ultra-wideband pulse; a pulse waveform arranging block for arranging the amplified pulses at predetermined delayed intervals; and a pulse waveform shaping block for summing the arranged pulses into a single pulse and integrating the single pulse to output the desired ultra-wideband pulse.02-25-2010
20090168843POWER-SAVING RECEIVER CIRCUITS, SYSTEMS AND PROCESSES - An electronic circuit includes a receiver circuit (BSP) operable to perform coherent summations having a coherent summations time interval, and a power control circuit (07-02-2009
20100040114INTRA-BODY COMMUNICATION SYSTEM FOR HIGH-SPEED DATA TRANSMISSION - Provided is an intra-body communication system which enables high-speed data transmission while limiting the frequency band of a signal being transmitted through a human body to a frequency range (e.g., 30-40 MHz) where the human body can maintain waveguide properties and enables stable intra-body communication by minimizing interference by other users or other electronic devices. A transceiver of the intra-body communication system for high-speed data transmission includes: a source encoder for encoding source information to digital transmission data; a channel error prevention unit for inserting a redundant bit to the encoded transmission data; a mapper for symbolizing the transmission data outputted from the channel error prevention unit; a spreader for performing spread spectrum on the symbolized transmission data in a frequency domain; and a pulse shaping and modulator for generating a baseband signal with a band range limited to a frequency range where the human body retains waveguide properties.02-18-2010
20100027586PLL CIRCUIT, COMMUNICATION DEVICE, AND LOOPBACK TEST METHOD OF COMMUNICATION DEVICE - A controlling unit disposed in a PLL circuit controls a phase interpolator to gradually change a phase shift amount applied to a phase shift signal C_PS by a unit of basic delay amount Δ at a timing predetermined in accordance with a modulation profile of an SSC. Further, the controlling unit controls a total phase shift amount applied to the phase shift signal C_PS output from the phase interpolator in one period of a feedback clock signal C_FB obtained by dividing frequency of the phase shift signal C_PS in a way that a difference between the total phase shift amount and a total phase shift amount in a previous one period of C_FB is always equal to or less than the basic delay amount Δ.02-04-2010
20100265991RECEIVING APPARTUS, RECEIVING METHOD, PHASE TRACKING APPARATUS, AND PHASE TRACKING METHOD OF PULSE-BASED UWB WIRELESS SYSTEM - Provided are a receiving apparatus, a receiving method, a phase tracking apparatus, and a phase tracking method of a pulse-based UWB wireless system, which are capable of tracking and compensating phases of signals modulated with different modulation schemes in the same pulse-based UWB receiver system. The receiving apparatus of the UWB wireless system includes an orthogonal channel generating unit for receiving a baseband signal to generate orthogonal channels, a boundary detecting unit for receiving output signals of the orthogonal channel generating unit to detect boundaries of preamble, header and payload signals, a phase tracking unit for tracking and compensating phases of the preamble, header and payload signals output from the boundary detecting units, and a demodulating unit for demodulating output signals of the boundary detecting unit and the phase tracking unit to output data bits.10-21-2010
20100265990METHOD AND SYSTEM OF WIRELESS DEVICE DISCOVERY IN A WIRELESS NETWORK EMPLOYING DIRECTIONAL ANTENNAS - A wireless device (10-21-2010
20100014561SPACE-TIME CODING METHOD FOR A MULTI-ANTENNA COMMUNICATION SYSTEM OF THE UWB PULSE TYPE - The invention relates to a space-time coding method for a UWB transmission system comprising a plurality of radiative elements, said method coding a block of information symbols S=(σ01-21-2010
20130070810BROADBAND REPEATER WITH SECURITY FOR ULTRAWIDEBAND TECHNOLOGIES - An ultrawideband radio transceiver/repeater provides a low cost infrastructure solution that merges wireless and wired network devices while providing connection to the plant, flexible repeater capabilities, network security, traffic monitoring and provisioning, and traffic flow control for wired and wireless connectivity of devices or networks. The ultrawidebande radio transceiver/repeater can be implemented in discrete, integrated, distributed or embedded forms.03-21-2013
20130070809BROADBAND REPEATER WITH SECURITY FOR ULTRAWIDEBAND TECHNOLOGIES - An ultrawideband radio transceiver/repeater provides a low cost infrastructure solution that merges wireless and wired network devices while providing connection to the plant, flexible repeater capabilities, network security, traffic monitoring and provisioning, and traffic flow control for wired and wireless connectivity of devices or networks. The ultrawideband radio transceiver/repeater can be implemented in discrete, integrated, distributed or embedded forms.03-21-2013
20110058591FREQUENCY SELECTIVE MODULATING APPARATUS AND METHOD USING RE-SPREADING CODE - A frequency selective modulation apparatus and method using re-spreading codes are disclosed. The frequency selective modulation apparatus includes: a serial-to-parallel converter receiving transmission data and performing serial-to-parallel conversion on the transmission data at a pre-set ratio; one or more sub-frequency selective spreaders selecting one spreading code by using data bits received from the serial-to-parallel converter; a majority value selection unit selecting a majority value from one or more spreading codes which have been selected by each of the one or more of the sub-frequency selective spreaders; and a first XOR logic circuit XORing an output of the majority value selection unit and a re-spreading code Wn to re-spread a frequency selective baseband to a frequency selective passband.03-10-2011
20090268783WIRELESS COMMUNICATIONS SYSTEMS AND/OR METHODS PROVIDING LOW INTERFERENCE, HIGH PRIVACY AND/OR COGNITIVE FLEXIBILITY - Communications systems and/or methods are disclosed that can provide extreme privacy, cognitive radio capability, robustness to fading and interference, communications performance associated with M-ary orthonormal signaling and/or high multiple-access capacity. Embodiments can use spread-spectrum waveforms that are featureless, devoid of chipping and devoid of cyclostationary signatures, statistically indistinguishable from thermal noise and able to cognitively fit within any available frequency space (narrow-band, broad-band, contiguous, non-contiguous). Some embodiments maintain all desirable features of classical direct-sequence spread-spectrum communications while providing new dimensions that are important to communications systems. Embodiments of the invention can provide M-ary orthonormal signaling with chipless spread-spectrum waveforms to provide extreme covertness and privacy. Moreover, embodiments of the invention may be used to cognitively and covertly utilize spectrum resources at minimal impact to incumbent users. Further embodiments may be used to provide minimum interference, opportunistic, “white space spectrum” communications.10-29-2009
20090268781UWB TRANSMITTING/RECEIVING APPARATUS, UWB TRANSMITTING/RECEIVING TERMINAL APPARATUS, AND UWB TRANSMITTING/RECEIVING SYSTEM - A UWB transmitting/receiving apparatus, a UWB transmitting/receiving terminal apparatus and a UWB transmitting/receiving system wherein a possibly reduced number of data retransmissions is achieved so as to raise the transmission efficiency. A UWB transmitting/receiving apparatus (10-29-2009
20090268782CFR ESTIMATION METHOD FOR MULTI-BAND OFDM-BASED UWB SYSTEMS - A multi-stage CFR estimation method for multi-band OFDM-based UWB systems is provided. The method comprises obtaining a CFR estimation ĥ10-29-2009
20090238240SINGLE-CARRIER BURST STRUCTURE FOR DECISION FEEDBACK EQUALIZATION AND TRACKING - Certain aspects of the present disclosure relate to a method for employing a special format for transmitting data blocks which allows parallel equalizations at a receiver. By applying parallel equalization operations, a clock at the receiver can operate at a fraction of the input signal's data rate, which is more practical in the case of very high data rates while power dissipation is also reduced.09-24-2009
20090010308POWER EFFICIENT SOFTWARE RECEIVER FOR SPREAD SPECTRUM SIGNALS - The present invention relates to reception and processing of spread spectrum signals to produce position/time related data. A proposed receiver includes a radio signal processing unit, which is at least partly implemented in software running on a microprocessor. The processor is also adapted to effect at least one separate software-controlled function. The receiver is adapted to operate the radio signal processing unit on at least two processing intensity levels each with different processing times. Thereby, when the radio signal processing unit operates on a low processing intensity level, a first amount of processing capacity is available for the at least one separate software-controlled function; and when the radio processing unit operates on a high processing intensity level, a second amount of processing capacity is available for the at least one separate software-controlled function. When the processor's over-all processing capacity is constant, the second amount is smaller than the first amount.01-08-2009
20090010307Receiver, Receiving Method, Program and Information Recording Medium - When a receiver (01-08-2009
20120236905REMOTE DETECTION OF ELECTRONIC DEVICES - An apparatus and method for detecting solid-state electronic devices are described. Non-linear junction detection techniques are combined with spread-spectrum encoding and cross correlation to increase the range and sensitivity of the non-linear junction detection and to permit the determination of the distances of the detected electronics. Nonlinear elements are detected by transmitting a signal at a chosen frequency and detecting higher harmonic signals that are returned from responding devices.09-20-2012
20130163638Receiver For Use In An Ultra-Wideband Communication System - In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. The samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”) substantially to filter channel-injected noise.06-27-2013
20120269230METHOD FOR CALCULATING CAUSAL IMPULSE RESPONSE FROM A BAND-LIMITED SPECTRUM - A computer-implemented method for calculating a time-domain impulse response with improved causality based on a first spectrum in a frequency domain is disclosed. The first spectrum may be band-limited. The method may calculate a first time-domain impulse response from the first spectrum. The method may remove a non-causal portion of the first system time-domain impulse response to obtain a second time-domain impulse response, and calculate a second spectrum of the second time-domain impulse response. The method may further modify the second spectrum by adding a causal signal such that a difference between the second spectrum and the first spectrum is reduced. The method may also calculate the time-domain impulse response with improved causality from the modified second spectrum.10-25-2012
20080291971Method and Transmitter, Receiver and Transceiver Systems for Ultra Wideband Communication - A transmitter for transmitting data as a pulsed ultrawide band signal comprises a serial-to-parallel converter (11-27-2008
20090323766METHOD AND DEVICE OF PEAK DETECTION IN PREAMBLE SYNCHRONIZATION FOR DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATION - A spread-spectrum preamble synchronization peak detection system performs multiple statistical tests based on instant and time-averaged channel condition measurements to identify the synchronization peak. In a normalized peak-to-average test, a peak-to-average ratio measurement is normalized by a signal-to-noise ratio measurement to form a new statistical measure which effectively eliminates the impact of the wide dynamic range of the signal-to-noise ratio of the received samples. A transition SNR test is used to eliminate potential false alarms caused by spurious PARN peaks during the transition period at the onset of preamble arrival. Code-phase aligned time-averaging is used to estimate the signal and noise levels over a sliding window. The code-phase alignment of samples effectively separates signal and noise samples in the averaging process, and resulting in more accurate signal and noise measurements. In estimating noise levels, the system takes multi-path interference into account by excluding both the peak signal and the side-lobe signals caused by multi-path wireless channels, resulting in more accurate estimation of noise level.12-31-2009
20110299570EMULATION AND CONTROLLED TESTING OF MIMO OTA CHANNELS - The present invention relates to techniques for OTA testing suitable for producing a test signal to emulate a wireless channel while using a limited number of transmit elements. The techniques described herein enable the number of transmit antennas used to emulate a given signal path in an emulated wireless channel to be less than the number of sub-paths used to characterize the angle spread of the given signal path. As a result, a test setup is provided having a relatively small number of transmit antennas which also accurately maintaining the desirable characteristics of the emulated wireless channel.12-08-2011
20110299569COMMUNICATION TESTING CIRCUIT, ELECTRONIC DEVICE, RECEIVING CIRCUIT, TRANSMITTING CIRCUIT, SEMICONDUCTOR INTEGRATED CIRCUIT, AND WAFER - Provided is a communication testing circuit that includes a transmitting unit including a spread spectrum clock generator that generates a modulated clock signal by modulating a reference clock signal, a pseudo-random binary sequence generator that generates a pseudo-random pattern, and a signal generator that generates a transmission signal by modulating the pseudo-random pattern based on the modulated clock signal, a receiving unit including a clock and data recovery circuit that receives the transmission signal and recovers the pseudo-random pattern from the transmission signal, and a detector that compares the recovered pseudo-random pattern with a preset pseudo-random pattern and outputs a signal indicating error information, and a control unit that counts a number of errors from the signal indicating error information input from the receiving unit and decides a timing margin based on a counting result.12-08-2011
20110286495Automatic Gain Control and DC Offset Compensation - A signal receiver having a gain control circuit comprising: detection means configured to form a representation of the excess amplitude during a training period of a signal received by the receiver; a first gain stimulus generator configured to generate a first gain stimulus in dependence on the excess amplitude detected by the detection means during the training period; averaging means configured to estimate the average of the signal received by the receiver during the training period; a second gain stimulus generator configured to generate a second gain stimulus in dependence on the average estimated by the averaging means during the training period; and a gain control signal generator configured to generate a gain control signal for the receiver in dependence on the first gain stimulus and the second gain stimulus.11-24-2011
20110286496QUADRATURE MODULATION WITHOUT CARRIER - Transmitters, receivers and associated methods are disclosed for providing phase and amplitude modulation in a carrier-less communication system (e.g., an ultra-wide band communication system). An approximate quadrature signal is provided by delaying the in-phase signal by an amount determined by various criteria, such as the bandwidths of the component signals, minimizing the mean square error between an approximate quadrature signal and the true quadrature signal, and minimizing the auto-correlation function of the in-phase signal.11-24-2011
20090103589Incoherent type mimo UWB communication system - This invention relates to a space-time coding process for a pulse type MIMO-UWB system using symbols belonging to a PPM modulation alphabet. Orthogonality of signals emitted by the different antennas is achieved by providing a mechanism for permutation of PPM symbol modulation positions and by imposing a constraint on the positions of said symbols. The space-time coding process according to the invention enables an incoherent type reception.04-23-2009
20100265993SYSTEM AND METHOD FOR ULTRA WIDEBAND RADIO WIRELESS NETWORK - A virtual wireless local area network system and method utilizing impulse radio wherein transmission rates (bit rates) can vary according to the impulse radio transmission quality (signal to noise ratio) and wherein the position of the user can be determined and said user can be directed to an area of greater transmission rates and wherein a plurality of impulse radio portals can be utilized and switched between to maintain high levels of transmission rates while a user is moving within a predetermined area.10-21-2010
20100014562Spectrum spreading signal demodulation method and apparatus - A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of which the carrier wave is modulated with a signal obtained by spectrum-spreading data with a spread code, is subjected to the FFT and the result of the FFT is stored in a first memory. The FFT result of the received signal stored in the first memory and the result of FFT of the spread code stored in a second memory are read out and multiplied to detect the correlation between the received signal and the spread code. A readout address of either the FFT result of the received signal or the FFT result of the spread code is shifted by an amount corresponding to a carrier frequency of the received signal.01-21-2010
20090213901METHOD FOR MANAGING THE OPERATION OF A WIRELESS APPARATUS CONFIGURED TO EXCHANGE INFORMATION WITH A MILLIMETER-WAVE COMMUNICATION DEVICE, AND CORRESPONDING APPARATUS - A wireless apparatus includes a millimeter-wave communication interface configured to exchange information within a millimeter-wave communication network, an UWB communication interface and control means or circuitry configured to activate the UWB interface for communicating location indication to the communication network according to an UWB communication standard. The location indication is intended for locating the wireless apparatus within the network.08-27-2009
20100027585Spread Spectrum Clocking With Transmitted Modulation - An electronic system having a spread spectrum clock. A spread spectrum clock source creates and transmits both a spread spectrum clock signal and a modulation signal. A spread spectrum clock generator uses a modulation waveform on the modulation signal to frequency modulate a reference oscillator frequency. A logic unit comprises a Phase Locked Loop that receives the spread spectrum clock signal and the modulation signal and generates a logic unit clock signal.02-04-2010
20090154526RADIO RECEIVING APPARATUS AND RADIO RECEIVING METHOD - A radio receiving apparatus of the present invention is for receiving a radio signal having pulsating signals occurring at specific periods, wherein the radio receiving apparatus corrects signal levels received during communication in individual regions into which each of the aforementioned periods is divided based on signal levels received in the individual regions under conditions where the radio signal is not received. As a result of this correction, the radio receiving apparatus of the present invention can decrease the influence of noise having periodicity and improve reliability of communication.06-18-2009
20100034238SPREAD SPECTRUM WIRELESS RESONANT POWER DELIVERY - Wirelessly delivering electric power to a target device. Operation includes generating a spread spectrum sequence, generating spread spectrum alternating current power based upon the spread spectrum sequence, coupling the spread spectrum alternating current power to a transmitting element for wireless power transmission by a non-radiated magnetic field, dynamically tuning the wireless power transmission according to the spread spectrum sequence, and communicating the spread spectrum sequence to the target device. The spread spectrum sequence may include a frequency hopping sequence and/or a phase hopping sequence. Communicating the spread spectrum sequence to the target device may employ Radio Frequency (RF) communications and be used to exchange a target device identity, target device billing information, target device power receipt level(s), a target device battery charge state, a request for power delivery from the target device, and/or authentication information from the target device.02-11-2010
20090154527PULSE GENERATOR, TRANSMITTER-RECEIVER, AND PULSE GENERATION METHOD - A pulse generator with a filter section limiting a band of an input signal, and a pulse generating section generating a plurality of pulses which are sequentially delayed one after another by a time period (τ) substantially equal to a reciprocal of a center frequency of the band of the filter section, and inputting the plurality of pulses to the filter section.06-18-2009
20090147828METHOD AND APPARATUS FOR GENERATING A PERMUTATION FOR REVERSE LINK HOPPING IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for generating a permutation for reverse link hopping is provided, comprising initializing permutation constants, determining a value for p such that i<206-11-2009
20090147827Methods, Systems, and Computer Program Products for Implementing Spread Spectrum Using Digital Signal Processing Techniques - Implementing spread spectrum using digital signal processing techniques. An incoming clock signal is received and sampled using a programmable sampling mechanism to generate a plurality of signal data points included in a sampled signal. The sampled signal is conditioned using a programmable signal conditioning mechanism capable of performing at least one of: reducing a cycle to cycle jitter of the sampled signal; or adjusting the sampled signal to a base frequency. The signal data points are processed and spread across a band of frequencies using a programmable digital signal processor to adjust at least one of: (a) an amplitude, (b) a phase shift, or (c) a frequency shift; for each of a plurality of respective signal data points at a plurality of corresponding frequencies in the band of frequencies. An output waveform is constructed from the processed and spread signal data points, wherein the output waveform constitutes a clock output signal.06-11-2009
20100124253Field bus system using spread spectrum - The invention describes a field bus system, in particular a field bus system (05-20-2010
20090129441UWB Receiver and a Data Transmission Method and System - The present invention relates to an ultra-wideband signal receiver comprising: 05-21-2009
20100226411LOW-NOISE AMPLIFIER AND RADIO COMMUNICATION SYSTEM - Power consumption of an amplification circuit (09-09-2010
20100086009SPREAD-SPECTRUM CLOCK GENERATOR AND SPREAD-SPECTRUM CLOCK GENERATING METHOD - A spread-spectrum clock generator (SSCG) and a spread-spectrum clock generating method are provided. The SSCG includes a first spread-spectrum module, a second spread-spectrum module, and a waveform module. The first spread-spectrum module generates a first spread-spectrum clock signal by modulating the frequency of a first input clock signal with a parallel delay configuration. The second spread-spectrum module generates a second spread-spectrum clock signal by modulating the frequency of a second input clock signal with the same parallel delay configuration. The waveform module is coupled to the first spread-spectrum module and the second spread-spectrum module for generating an output spread-spectrum clock signal according to the first and the second spread-spectrum clock signals.04-08-2010
20090080496USER EQUIPMENT FOR CONTROLLING TRANSMISSION POWER LEVELS - A user equipment (UE) with circuitry configured to determine a pathloss associated with a received signal. The circuitry is configured to receive an adjustment and adjust a value in response to the received adjustment. The circuitry is configured to determine a transmit power level based on multiplying the determined pathloss by a parameter and adding the adjusted value to a result of the multiplying, wherein the parameter is value in the range of 0 to 1. The circuitry is configured to transmit a signal at the determined transmit power level.03-26-2009
20090207885Delay estimation apparatus and method - Delay estimation apparatus and method, comprising: a correlation step which a correlation function between a received signal and a supplied template waveform is generated, AD conversion step at which said correlation output generated at said correlation step is uniformly sampled into discrete samples; and arithmetic operation step at which a time delay estimate of the received signal based on said discrete samples generated at said AD conversion step is computed, wherein a selection criterion depending on the digital sampling frequency used at said AD conversion means is checked, if said selection criterion is satisfied, computes the time delay estimate based on the direct pick method, and if said selection criterion does not hold, computes the time delay estimate based on the simplified maximum likelihood (ML) method.08-20-2009
20100086008MOBILE WIRELESS COMMUNICATIONS DEVICE FOR MODULATIONS WITH MEMORY - A mobile wireless communications device may include an antenna, and a transceiver coupled to the antenna. The transceiver may use a modulation having memory for a message in a frame structure including a data portion and a termination portion based upon the data portion. The termination portion may drive the modulation to a desired known ending state. The modulation may include a spread spectrum modulation or a non-spread modulation.04-08-2010
20090296783Delay estimation apparatus and method - The delay estimation apparatus (12-03-2009
20100080264IMAGE READING DEVICE - An image reading device including: a photoelectric conversion device that outputs an analog signal corresponding to an image read from a document; an A-D converter that converts the analog signal into a digital signal; a spread spectrum clock generation unit configured to generate a spread spectrum clock by executing frequency-modulation on a reference clock having a constant frequency; an acquisition timing setting unit configured to set an acquiring timing of the analog signal with reference to the spread spectrum clock; and an acquisition timing correction unit configured to execute a delay correction for the acquiring timing of the analog signal set by the acquisition timing setting unit in accordance with a frequency of the spread spectrum clock defined when the analog signal is outputted. The analog signal acquired at the corrected acquiring timing corrected by the acquisition timing correction unit is converted into the digital signal.04-01-2010
20110200073DEVICE AND METHOD FOR ESTIMATING DOPPLER SPREAD IN A MOBILE COMMUNICATIONS TERMINAL - The invention is suitable for use in an OFDM system, such as the 3GPP-LTE mobile phone system. A method of estimating Doppler spread in a mobile communications device includes: (a) selecting a channel estimate from each of a sequence of time slots at each of a series of selected sub-carrier frequencies; (b) performing a Digital Fourier Transform (DFT) on the selected channel estimates at each selected sub-carrier frequency to thereby compute DFT components at different frequency bins; (c) summing the DFT components at all selected sub-carrier frequencies for each different frequency bin; (d) detecting the frequency bin at which the summed DFT components first falls below a predetermined threshold; and (e) converting the detected frequency bin into a Doppler spread estimate.08-18-2011
20110200072METHOD AND APPARATUS FOR SELECTING A CHANNEL IN WIDEBAND HIGH FREQUENCY WIRELESS SYSTEM - Provided is a method and apparatus for selecting a channel in a wideband high frequency wireless system. The channel selection method may include: generating a channel scanning request frame that includes a channel bitmap, wherein the channel bitmap denotes information regarding a channel to be scanned by a neighboring device; transmitting the channel scanning request frame to the neighboring device; receiving a channel scanning response frame corresponding to the channel scanning request frame; and selecting a channel for a communication with the neighboring device, based on the channel scanning response frame.08-18-2011
20110200071WIRELESS COMMUNICATION SYSTEM, CONTROL STATION APPARATUS AND TERMINAL APPARATUS - To switch among access schemes of different systems efficiently, in a wireless communication system for selecting one access scheme from among a plurality of access schemes to perform wireless communications in between a control station apparatus and a terminal apparatus, the control station apparatus notifies the terminal apparatus of an access scheme using information indirectly designating the access scheme, and the terminal apparatus selects one access scheme from among a plurality of access schemes according to the notified information to perform wireless communications with the control station apparatus.08-18-2011
20080317099Method and apparatus for signal carrier-to-noise power density ratio caculation - There is provided an apparatus for determining a carrier-to-noise power density ratio (CN12-25-2008
20110170573METHOD AND APPARATUS FOR MANAGING DEVICE DISCOVERY IN WIRELESS SYSTEM - Provided is a method and apparatus for managing a device discovery in a wireless system. The device discovery management method may include: transmitting, by a discovery device, a discovery beacon that contains information associated with a discovery scanning duration; and receiving, from a neighboring device, a response message to the discovery beacon in the discovery scanning duration.07-14-2011
20090141774SPREAD SPECTRUM CLOCK GENERATOR CAPABLE OF FREQUENCY MODULATION WITH HIGH ACCURACY - In a spread spectrum clock generator, a DLL circuit delays an oscillation clock signal from a VCO and outputs ten delay clock signals having different phases respectively. A selector selects any one of the ten delay clock signals, and outputs a selected clock signal. A control circuit controls a signal selection operation of the selector. A feedback frequency divider divides a frequency of the selected clock signal by a frequency division ratio N, and generates a comparison clock signal. In this manner, a phase of the comparison clock signal can be fine-tuned. Therefore, a spread spectrum clock generator capable of frequency modulation with high accuracy can be obtained.06-04-2009
20090103590Code Division Multiple Access Wireless System With Closed Loop Mode Using Ninety Degree Phase Rotation And Beamformer Verification - A wireless communication system (04-23-2009
20090180517DATA TRANSMITTING/RECEIVING METHOD AND APPARATUS IN UWB COMMUNICATION SYSTEM - A data transmitting/receiving method and apparatus for allocating optimal sub-bands and transmission power levels and transmitting data in a ultra wide band (UWB) communication system. The method includes receiving data through sub-bands of each band group; determining performance ranks of the sub-bands based on error rates and differences of transmitting and receiving power levels of the received data; selecting a predetermined number of sub-bands according to the performance ranks of the sub-bands; generating power level adjustment information based on measured power levels of data of the selected sub-bands; and receiving data according to the selected sub-bands and the power levels.07-16-2009
20100111138Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing - The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function, the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones.05-06-2010
20080212649METHOD AND SYSTEM FOR A DISTRIBUTED BLUETOOTH® HOST ARCHITECTURE - Aspects of a method and system for a distributed Bluetooth® Host Architecture may include combining a single main Bluetooth® host with subsidiary Bluetooth® hosts to form a distributed Bluetooth® processing entity that operates as a single Bluetooth® host for a Bluetooth® host controller. An active data connection may be handed over between the main Bluetooth® host and the subsidiary Bluetooth® hosts, where the active data connection may be between the Bluetooth® host controller and the distributed Bluetooth® entity. The active data connection may be an Asynchronous connection-less (ACL) link or a Synchronous Connection-Oriented (SCO) link. Layers of a protocol stack of the main Bluetooth® host may be synchronized with one or more of the subsidiary Bluetooth® hosts to achieve hand over.09-04-2008
20080212648METHOD AND SYSTEM FOR MULTIPLE HCI TRANSPORT FOR BLUETOOTH® HOST CONTROLLERS - Aspects of a method and system for multiple HCI transport for Bluetooth® Host controllers may include communicating between a plurality of Bluetooth® hosts and a single Bluetooth® host controller by using one or more Bluetooth® host controller interfaces. Control of the Bluetooth® host controller interfaces may be assigned to one or more of the Bluetooth® hosts. Control of the Bluetooth® host controller interfaces may be switched among different Bluetooth® hosts using various protocol commands may be used to communicate between Bluetooth® hosts to control switching. Communications between Bluetooth® hosts may occur over interfaces different from the Bluetooth® host controller interfaces. Switching may occur without resetting the Bluetooth® hosts and Bluetooth® host controller.09-04-2008
20110268155DISTANCE ESTIMATION APPARATUS, SYSTEM AND METHOD USING RANGING COUNTER - Provided is a distance estimation apparatus, system and method for accurately estimating the distance between TX/RX devices by means of low-end hardware in a communication system such as the IEEE 802.15.4a system. The distance estimation apparatus includes an analog-to-digital converter, a parallelizer, a parallel synchronization means, a counter, and a system clock generator. The analog-to-digital converter analog-to-digital converts a received packet signal to generate a serial digital signal, and the parallelizer 1:N parallelizes the serial digital signal. The parallel synchronization means includes an N number of buffers for receiving the output of the parallelizer. A counter outputs a count value for estimation of the propagation delay time of a UWB signal on the basis of the sampling data retained in the parallel synchronization means. The system clock generator generates a system clock in the distance estimation apparatus. Therefore, it is possible to accurately estimate the distance between the TX/RX devices by arithmetically calculating a received signal while operating a ranging counter with a low-rate system clock, thereby simplifying the hardware structure and minimizing power consumption.11-03-2011
20090262784MIXER CIRCUIT AND COMMUNICATION APPARATUS INCLUDING MIXER CIRCUIT - A mixer circuit which outputs a first output signal and a second output signal, in which are mixed a first input signal and a second input signal, includes a first grounded source amplifier circuit which amplifies the first input signal, a second grounded source amplifier circuit which amplifies the second input signal, a first signal output unit which outputs the first output signal, a second signal output unit which outputs the second output signal, a first transistor group including n rows and m columns (n is an integer equal to or greater than two, m is an integer equal to or greater than two) of transistors connected between the first grounded source amplifier circuit and the first signal output unit, a second transistor group including n rows and m columns of transistors connected between the first grounded source amplifier circuit and the second signal output unit, a third transistor group including n rows and m columns of transistors connected between the second grounded source amplifier circuit and the first signal output unit, a fourth transistor group including n rows and m columns of transistors connected between the second grounded source amplifier circuit and the second signal output unit, and n×m×k (k is 1 or 2) control signal lines to which n×m×k control signals which drive the first transistor group and the second transistor group, and drive the third transistor group and the fourth transistor group.10-22-2009
20080240203Method of and apparatus for analyzing noise in a signal processing system - A fast accurate multi-channel frequency dependent scheme for analyzing noise in a signal processing system is described herein. Noise is decomposed within each channel into frequency bands and sub-band noise is propagated. To avoid the computational complexity of a convolution, traditional methods either assume the noise to be white, at any point in the signal processing pipeline, or they just ignore spatial operations. By assuming the noise to be white within each frequency band, it is possible to propagate any type of noise (white, colored, Gaussian, non-Gaussian and others) across a spatial transformation in a very fast and accurate manner. To demonstrate the efficacy of this technique, noise propagation is considered across various spatial operations in an image processing pipeline. Furthermore, the computational complexity is a very small fraction of the computational cost of propagating an image through a signal processing system.10-02-2008
20090207886Apparatus and method for synthesizing and generating an SSC modulated signal - A system and method for synthesizing and generating the SSC modulated signal with precision and in a controlled manner is provided. In one embodiment the system may be integrated in an arbitrary waveform generator.08-20-2009
20080273574SPREAD SPECTRUM CLOCK SIGNAL GENERATION SYSTEM AND METHOD - A system and method for generating a clock signal having spread spectrum modulation. The method involves generating a clock signal by generating edge positions for edges of the clock signal from a digital representation of a timing for each edge to impart spread spectrum modulation to the clock signal. A programmable modulator is provided that generates digital values representing edge positions for edges of a clock signal based on at least one of a time-varying period value and a time-varying duty-cycle value. The programmable modulator may comprise a first circuit, called a period modulation circuit, that generates a time-varying digital period value, and a second circuit, called a duty-cycle modulation circuit, that generates a time-varying digital duty-cycle value. The time-varying period values and time-varying duty cycle values are processed to produce a digital edge position value that specifies an edge position for a clock signal. The programmable modulator is coupled to an arbitrary waveform synthesizer that generates timing for edges of the clock signal based on the edge position values. A variety of modulations can be imposed on the clock signal using these techniques, including triangle wave modulation, near-triangle modulation, random and pseudo-random modulation.11-06-2008
20080291972Method and Transmitter, Receiver and Transceiver Systems for Ultra Widebrand Communication - A system such as a code division multiple access (CDMA) system or an ultrawide band (UWB) system comprises a transmitter and a receiver. The transmitter includes a sequence extender for extending the incoming signal and a spreader for spreading the extended signal, the spreader input being coupled to the sequence extender output. A pulse shaper is coupled to the spreader output to provide a transmitter output signal. The transmitter output signal which has an associated chip rate is received by the receiver and is passed to a filter to select a number of input signals from the received signals. The signal is the passed to a sequence extension remover for removing a number of chips from the signal. The received signal is despread to a symbol rate which is less than the chip rate at which the received signal was spread prior to being received by the receiver. A frequency domain equalizer is provided to form a frequency equalized signal from the modified signal.11-27-2008
20080291973Integrated Ultra-Wideband (Uwb) Pulse Generator - A pulse generator includes a sinusoidal monocycle generator (11-27-2008
20080291974Signal Transmitter for Wideband Wireless Communication - A signal transmitter for generating a wideband RF signal for use in, for example, a 60 GHz wireless area network, wherein a wideband (e.g 4 GHz) baseband signal is divided into a number of sub-signals (11-27-2008
20080304548Spread Spectrum Method with Elimination of Sub-Bands - The invention relates to a spread spectrum method for a digital input signal (x(n)), said method comprising the following steps: coefficients of a reversible digital periodical linear filter (12-11-2008
20080212651Communication protocol - A communication protocol for ultra-wideband communications is provided. The present invention provides compatibility and interoperability between ultra-wideband communications devices within various types of networks. In one embodiment, combined, or interleaved data frames having both high and low data transfer rate capability are provided. The low data transfer rate may be used for initial discovery of the type of network that is being accessed, and the high data transfer rate may be used to quickly transfer data within networks that have a high data transfer rate capability. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.09-04-2008
20090180519DRIVING METHOD OF GLOBAL POSITIONING SYSTEM USING SHORT-RANGE COMMUNICATION - A global positioning system using Bluetooth technology, including: a first Bluetooth master that receives satellite orbit information; a Bluetooth slave that communicates with the first Bluetooth master in a Bluetooth protocol; and a second Bluetooth master that transmits an inquiry code for communication with the Bluetooth slave in the Bluetooth protocol. The second Bluetooth master provides positioning information by requesting the satellite orbit information from the first Bluetooth master through the Bluetooth slave and transmitting the satellite orbit information to the second Bluetooth master through the Bluetooth slave.07-16-2009
20090080494Communication system and communication method - A communication system is disclosed that includes a first device that performs communication of information with the outside; a second device through which the information is input and output; and a relay device that performs wired communication with the first device and wireless communication with the second device to relay the information between the first device and the second device.03-26-2009
20090129442CDMA UNII LINK - Techniques and systems for mediating traffic between a network transceiver and a user transceiver in a wireless communication system are disclosed. A network link with the network transceiver is maintained using a network unit, and a user link with the user transceiver is maintained using a user unit. One or more replicas of a signal received from the network transceiver on a downlink path or from the user transceiver on an uplink path, respectively, are generated. The one or more replicas of the signal wirelessly are then transmitted on a hop between the network unit and the user unit along with a bi-directional control channel.05-21-2009
20120140793SPECTRUM SENSOR FOR COGNITIVE WIRELESS COMMUNICATION AND METHOD FOR COGNITIVE WIRELESS COMMUNICATION - Provided is a spectrum sensor for cognitive wireless communication whereby it is possible to improve communication efficiency. In a cognitive wireless communication system, a spectrum sensor senses spectra in multiple frequency bands. A spectrum sensor is configured to be able to operate in one operation mode selected from among a spectrum sensing mode for sensing spectra, and a communication mode for communicating with a wireless communication device. Further, the spectrum sensor is provided with a controller for controlling the operation mode. The controller switches between the above-mentioned operation modes during the symbol period of an ultra-wideband physical layer (UWB PHY).06-07-2012
20120069868RECEIVER FOR USE IN AN ULTRA-WIDEBAND COMMUNICATION SYSTEM - In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. The samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”) substantially to filter channel-injected noise.03-22-2012
20090003412SPREAD SPECTRUM RADAR APPARATUS - To provide a spread spectrum radar apparatus which can lower the probability for misidentifying a presence of object. The spread spectrum radar apparatus includes: a pseudo-noise code for transmission generation unit which generates a pseudo-noise code for transmission; a spread spectrum modulation unit which performs spread spectrum modulation on a carrier wave using the pseudo-noise code for transmission; a pseudo-noise code for receiver generation unit which generates a pseudo-noise code for receiver which is a time-delayed pseudo-noise code for transmission; a spread spectrum demodulation unit which performs spread spectrum demodulation on a received signal, using the pseudo-noise code for receiver, so as to output a correlation signal; a code change control unit which changes the pseudo-noise codes for transmission and receiver into a different kind of the pseudo-noise codes at every predetermined time; and a correlation value calculation unit which averages or integrates, with the number of kinds of the generated pseudo-noise codes, an intensity of the correlation signal.01-01-2009
20100150207SETTING A TRANSMISSION POWER LEVEL FOR A MOBILE UNIT - A spread signal is produced having an adjustable spread spectrum. A data signal is provided for transmission. The data signal is processed to have a first spread spectrum. The processed first spread spectrum data signal is filtered to have one out of a plurality of spread spectrums. The filtering capable of producing a signal having a spread spectrum of any of the plurality of spread spectrums. The filtered one spread spectrum data signal is transmitted.06-17-2010
20110222586HIGH-FREQUENCY COUPLER AND COMMUNICATION DEVICE - A high-frequency coupler includes a ground, a coupling electrode which faces the ground and is supported so as to be separated by a negligible height with respect to a high-frequency signal, a resonating unit for increasing a current flowing into the coupling electrode, a supporting unit which is connected to the resonating unit, and a short-circuiting unit which short-circuits the tip portions of the coupling electrode, in which an infinitesimal dipole constituted by a line connecting the center of the charges accumulated in the coupling electrode and the center of mirror-image charges accumulated in the ground is formed, and the high-frequency signal is transmitted toward a high-frequency coupler of a communication partner so that the angle θ formed in the direction of the infinitesimal dipole is substantially 0 degrees.09-15-2011
20090285262ANTENNA APPARATUS OF PORTABLE TERMINAL - An antenna apparatus of a portable terminal and method for implementing characteristics of the antenna apparatus of the portable terminal are disclosed. The antenna apparatus includes a circuit board including a power feeder and a ground, a radiation unit, a power feeder connecting unit for electrically connecting the power feeder to the radiation unit and for feeding electric power to the radiation unit, and a ground connecting unit including at least two paths which have different lengths for electrically connecting the ground to and disconnecting the ground from the radiation unit selectively.11-19-2009
20090080495GROUPWISE SUCCESSIVE INTERFERENCE CANCELLATION FOR BLOCK TRANSMISSION WITH RECEPTION DIVERSITY - A plurality of data signals are received over an antenna array having a plurality of antenna elements. The data signals are transmitted over a shared spectrum in a wireless communication system. A signal having each of the data signals is received over each antenna element. The plurality of data signals are grouped into a plurality of groups. The received signals of the antenna elements are matched filtered for a first group of the plurality of groups, producing a matched filtered result. Data is jointly detected of the first group using the matched filtered result. An interference correction signal is constructed using the detected data for each antenna element. The interference cancelled result is subtracted from the received signal of each antenna element, producing an interference cancelled result for each antenna element. Data is successively detected for remaining groups using the interference cancelled result for each antenna element.03-26-2009
20110228815TRANSMISSION APPARATUS, RECEPTION APPARATUS AND COMMUNICATION SYSTEM - In SU-MIMO, even when the channel state of one antenna is poor, an error ratio is improved by obtaining a transmission antenna diversity effect. A transmission apparatus 09-22-2011
20090080493Apparatus and method for generating a monocycle - An apparatus for generating a monocycle comprises an input signal source (03-26-2009
20110228814COMMUNICATION DEVICE - A communication device includes a case, a high frequency coupler that is disposed inwards from the surface of the case so as to be spaced apart from the surface and transmits and receives a signal of an induction electric field, and a surface wave transmission path that is disposed between the radiation surface of the induction electric field of the high frequency coupler and the surface of the case.09-22-2011
20110142094ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING-CODE DIVISION MULTIPLE ACCESS SYSTEM - An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.06-16-2011
20110142093LOW VOLTAGE MIXER CIRCUIT FOR A UWB SIGNAL TRANSMISSION DEVICE - The low voltage mixer circuit can be fitted to a UWB signal transmission device. The circuit includes first and second differential pairs of NMOS transistors (M06-16-2011
20110222584HIDDEN MARKOV MODEL DETECTION FOR SPREAD SPECTRUM WAVEFORMS09-15-2011
20100002749METHOD OF CODING AND DECODING A PULSE SIGNAL, IN PARTICULAR AN UWB-IR SIGNAL, AND CORRESPONDING DEVICES - A method is for decoding a pulse signal modulated through a transmitted reference modulation scheme. The modulated pulse signal may include, repetitively, a reference pulse followed by an information pulse delayed with a delay. The method may include subtracting or adding from the modulated pulse signal, a version of the modulated pulse signal delayed with the delay for obtaining a processed signal, and performing a non-coherent detection on the processed signal.01-07-2010
20090201973APPARATUS FOR TRANSMITTING DATA AND ADDITIONAL INFORMATION SIMULTANEOUSLY WITHIN A WIRE-BASED COMMUNICATION SYSTEM - An apparatus is provided for transmitting data signals and additional information signals having partially overlapping frequency bands simultaneously within a wire based communication system over the same wired medium using a spread spectrum technique for modulating the additional information signals.08-13-2009
20090207887APPARATUS AND METHOD FOR TRANSMITTING FEEDBACK INFORMATION IN BROADBAND WIRELESS ACCESS SYSTEM - An apparatus and method for transmitting feedback information are provided. In a method of operating a transmitter for transmitting feedback information in a broadband wireless access system, the method includes estimating a channel of a second path on the basis of information of a received downlink frame, obtaining a channel representative value corresponding to the estimated channel of the second path, modulating the channel representative value by spreading the channel representative value to a sounding symbol to be transmitted, and transmitting the modulated sounding symbol through a first path.08-20-2009
20090219975Ultra wide band device for detection and avoidance of ultra wide band signal - Example embodiments are directed to a method for detection and avoidance (DAA) of an ultra wide band (UWB) signal and a UWB terminal. The method includes: shifting a data signal by a desired frequency in a first direction; filtering the shifted data signal through a notch filter; and shifting the filtered data signal by the desired frequency in a second direction, the second direction being opposite to the first direction. The UWB terminal comprises an encoder for encoding data signals; a tone nulling unit for changing at least one tone of the plurality of tones into a null tone; an inverted fast Fourier transformer; a low pass filter for filtering the inverted fast Fourier transformed data signals; a filter circuit for attenuating an intensity of the low pass filtered signal; and a radio frequency (RF) circuit for transmitting the filtered signal.09-03-2009
20090219974VARYING DEVICE IDENTITIES - A communication device comprises a memory for storing a device identity; a data transmitter for supporting communication links with other devices; and a communication controller, wherein the controller is configured to periodically vary the stored device identity and to cause the data transmitter to periodically transmit the stored device identity so that the device can be identified.09-03-2009
20090219973Pulse modulation and demodulation in a multiband uwb communication system - In a wireless communications system, such as a multiband Ultra Wideband communications system, data is transmitted by means of the phases of pulses in multiple frequency bands. A signal is transmitted with a predetermined phase in at least one of the frequency bands for at least a part of the time, and can be used to allow accurate detection of the phases of the signals transmitted in the other frequency bands. One of the frequency bands can be designated as a reference band, and pulses can be transmitted with constant phase in the reference band. More generally, pulses can be transmitted in the other frequency bands with phases which have a known relationship with the phases of the pulses in the reference band.09-03-2009
20090245327SELECTIVE NOISE CANCELLATION OF A SPREAD SPECTRUM SIGNAL - A method is provided for improving a signal-to-noise ratio in a received signal. The method involves receiving a spread spectrum signal (SSS) with a power level below a noise floor of a receiver. The SSS is generated by modulating a data signal using a spreading sequence (SS) comprised of a random number sequence (RNS). The SS can be generated using a chaos generator or any other deterministic means. The method also involves comparing a magnitude of each number of the RNS which was used to generate the SSS to an adaptable threshold value. The adaptable threshold value is selected based on a minimum magnitude of each number necessary to produce samples having a predetermined signal-to-noise ratio. Notably, samples of the received SSS are excluded from a receiver processing based on a result of the comparison. Similarly, each number of a random number sequence is excluded from the receiver processing based on the comparison.10-01-2009
20090257472INTERFERENCE CANCELLATION IN A SPREAD SPECTRUM COMMUNICATION SYSTEM - A code division multiple access communication system transmits a pilot and traffic signal over a shared spectrum. The pilot and traffic signal have an associated code and are received over the shared spectrum. The received signals are sampled and the samples are delayed to produce a window. A weighted value for each despread pilot code window sample is determined using an adaptive algorithm. Each window sample is despread with a traffic code. Each despread traffic code window sample is weighted according to a weight corresponding to its respective pilot code sample.10-15-2009
20090257471COMMUNICATION DEVICE, NOISE REMOVING METHOD, AND PROGRAM - A communication device according to an embodiment of the present invention includes a communication antenna that receives a transmission signal where a spectrum spread signal subjected to a spectrum spread is modulated; an intermediate frequency converting unit that converts the transmission signal received by the communication antenna into an intermediate frequency signal having a predetermined frequency; an analog to digital converting unit that discretizes the intermediate frequency signal and outputs a discretization signal; a noise removing unit that detects a noise other than a normal thermal noise included in the discretization signal and removes the detected noise from the discretization signal; and a demodulating unit that demodulates the spectrum spread signal, based on the discretization signal that is output from the noise removing unit.10-15-2009
20110228816SETTING A TRANSMISSION POWER LEVEL FOR A MOBILE UNIT - A spread signal is produced having an adjustable spread spectrum. A data signal is provided for transmission. The data signal is processed to have a first spread spectrum. The processed first spread spectrum data signal is filtered to have one out of a plurality of spread spectrums. The filtering capable of producing a signal having a spread spectrum of any of the plurality of spread spectrums. The filtered one spread spectrum data signal is transmitted.09-22-2011
20100265992Adaptative Multi-Carrier Code Division Multiple Access - A system for performing adaptative multi-carrier code division multiple access (AMC-CDMA) is provided. The system determines a channel performance metric for each of a plurality of carriers and then determines at least one AMC-CDMA parameter for each of the carriers based on the channel performance metric. Modulator circuitry then modulates the signal on each carrier using the specified AMC-CDMA parameters for transmission over a wired connection.10-21-2010
20100014563Spectrum spreading signal demodulation method and apparatus - A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of which the carrier wave is modulated with a signal obtained by spectrum-spreading data with a spread code, is subjected to the FFT and the result of the FFT is stored in a first memory. The FFT result of the received signal stored in the first memory and the result of FFT of the spread code stored in a second memory are read out and multiplied to detect the correlation between the received signal and the spread code. A readout address of either the FFT result of the received signal or the FFT result of the spread code is shifted by an amount corresponding to a carrier frequency of the received signal.01-21-2010
20100166039APPARATUS AND METHOD FOR GENERATING SMALL-SIZE SPREAD SPECTRUM CLOCK SIGNAL - An apparatus and method for generating a small-size spread spectrum clock signal that can include generating a reference clock signal by dividing an external clock signal, detecting frequency and phase differences between a reference clock signal and a comparison clock signal as error signals, modulating a controlled voltage corresponding to the current in accordance with a modulation control signal, outputting an oscillation clock signal having a frequency oscillated according to the modulated controlled voltage as a spectrum-spread version of the external clock signal, and generating the comparison clock signal by dividing the oscillation clock signal, and then compensating for the modulation of the controlled voltage in accordance with a demodulation magnitude that is generated for use in compensating for the modulation magnitude.07-01-2010
20100150206RADIO COMMUNICATION DEVICE AND RESPONSE SIGNAL DIFFUSION METHOD - Provided is a radio communication device which can suppress inter-code interference between an ACK/NACK signal and a CQI signal which are code-multiplexed. In this device, a diffusion unit (06-17-2010
20100183047WIRELESS COMMUNICATION APPARATUS AND RESPONSE SIGNAL SPREADING METHOD - A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part (07-22-2010
20110128992SEMICONDUCTOR INTEGRATED COMMUNICATION CIRCUIT AND OPERATION METHOD THEREOF - The semiconductor integrated communication circuit includes:06-02-2011
20090296784METHOD AND DEVICE FOR NOTCHING THE TRANSMISSION BAND OF AN ANALOG SIGNAL, IN PARTICULAR FOR A DETECT AND AVOID (DAA) OPERATION MODE OF AN MB-OFDM SYSTEM - A transmission band of an analog signal including successive symbols to be transmitted is notched, where each symbol includes sub-carriers to be modulated. In particular, in each symbol the sub-carriers corresponding to a part of the transmission band to be notched are suppressed. In addition, in each symbol a chosen part of the remaining sub-carriers to be modulated is also suppressed.12-03-2009
20100189161METHOD FOR DETECTING THE PRESENCE OF SPREAD SPECTRUM SIGNALS - The present invention relates to a method for detecting the presence or the absence of a spread spectrum signal in a frequency band of interest of a received signal, wherein: 07-29-2010
20100177803ULTRA WIDEBAND ON-CHIP PULSE GENERATOR - A method for generating an UWB pulses based on LC oscillator topology. Fast turn on of the oscillator is achieved by creating large asymmetry in a normally symmetrical topology which is used in a typical differential type oscillator. One method for achieving large asymmetry is activating one branch of a differential pair of branches for a short duration before activating both branches in a normal operation. The bandwidth of the pulse is controlled by modifying the duration of the oscillator activation. Fast turn on and turn off is essential for high bandwidth generation. The method is adaptable for generating binary phase shift keying (BPSK) modulation. Selecting the activated branch of a fully symmetrical topology controls the output phase and creates two possibilities which differ exactly by 180 degrees. In a preferred embodiment, all the pulse generator components are on-clip leading to a low cost solution. The circuit can generate high power pulses directly on a load. It is also an option to add an amplifier to drive the output and separate the load from the oscillator. This method generate high power, stable pulses under varying practical conditions like process changes, VDD changes and temperature changes.07-15-2010
20100158076Direct Sequence Spread Spectrum Correlation Method for a Multiprocessor Array - A method and apparatus for correlation of a received DSSS signal with a PN sequence, thus significantly reducing the processing time and operating power needed to acquire phase information for DSSS de-spreading and demodulation. The apparatus utilizes a multiprocessor array 06-24-2010
20100238974DOWNLINK COMMUNICATION - A method for conserving bandwidth in a communication system includes spreading a data frame and a broadcast frame. A complex data stream having a first component and a second component is generated. The data frame is assigned to the first component and the broadcast frame is assigned to the second component. The complex data stream is transmitted to a tag.09-23-2010
20110110397DATA PROCESSOR AND COMMUNICATION SYSTEM - A data processor which can flexibly control bandwidth settings and setting changes is provided. The data processor controls bandwidth allocation to electronic devices participating in a communication network. The data processor has a communication section used to communicate with the electronic devices and a bandwidth management section which performs control to variably allocate, based on requests from the electronic devices, bandwidths to be used for communication by the electronic devices. In cases where an additional device is added to the communication network and an adequate bandwidth cannot be allocated to the additional device, the bandwidth management section requests another electronic device transmitting video data of a resolution higher than corresponding to the user's intention to change its data format so as to allow an adequate bandwidth to be allocated to the additional device.05-12-2011
20100238975RADIO COMMUNICATION DEVICE AND CONSTELLATION CONTROL METHOD - Provided is a radio communication device which can improve the NACK error rate characteristic. The device includes: a scrambling unit (09-23-2010
20100118918SPREAD SPECTRUM ISOLATOR - An apparatus comprising a functional circuitry on a first die. Said function circuitry configured to drive an RF voltage isolation link with an RF signal responsive to receipt of a logic signal at a first logic state. Control circuitry modifies the frequency of the RF signal to spread harmonics to other than a fundamental frequency.05-13-2010
20110032972Economical, RF transparent, selective code phased array antenna processor - A single chip diversity beamforming antenna array processor is disclosed. The processor utilizes low-power and low area circuits to achieve combining game mitigate the effects of multipath fading provide spatial suppression and provide diversity gain to a single input receiver. The device is radiofrequency transparent yet provides antenna gain by selective three G and four G code acquisition and tracking of a desired downlink channel.02-10-2011
20080279256Method and Apparatus For Eliminating Narrow Band Interference By Means of Windowing Processing in Spread Spectrum System - A device and method for eliminating narrow-band interference by way of windowing in a spread spectrum system, wherein the device comprises of a frequency spectrum transform unit, an interference elimination unit, an interference elimination control unit and a frequency spectrum inverse transform unit. Said method comprises the following steps: extracting N sampling points of data to perform frequency spectrum transform each time and obtaining N points of data; then updating control information, comparing the energy values of the N points with the threshold within the set time period to determine the number of narrow-band interference as well as the width and location of the interference; then determining the corresponding frequency domain adjusting window based on the width and location of the narrow band interference, obtaining the points within the window and the adjusted values of those points; with regard to the transformed N points during interference elimination process, setting the energy values of the points within the window during the current time period and the last period as the corresponding adjusted values, and then outputting the points after frequency spectrum inverse transform. The present invention can reduce adverse impacts of spectrum leakage on the capability for suppressing narrow-band interference.11-13-2008
20100278214Pulse-level interleaving for UWB systems - Systems and methods are disclosed that provide pulse-level interleaving for multi-pulse-per-bit ultra wideband (UWB) transmit and receive processing techniques to provide significantly improved multi-access for UWB systems and, more particularly, for long range UWB systems. A bit stream is processed such that each bit in a bit stream is represented by a plurality of bits in a bit frame and then transmitted using a plurality of UWB pulses for each bit frame. Where on-off-keying (OOK) modulation is used, each logic “1” is sent out as a plurality of pulses, and each logic “0” is sent out as a plurality of non-pulses. Pulse-level interleaving (PLI) of the pulses across multiple bit frames prior to transmission is provided to allow for improved multi-access (MA) by a plurality of UWB transmitters operating at the same time. Rather than attempt to detect each pulse as it arrives at the receiver, the receiver instead first de-interleaves the pulses and then aggregates the energy from the multiple pulses within each bit frame. The aggregated pulse energy is then processed by a pulse detector to detect a pulse. Where OOK modulation is used, this pulse detection detects the existence of a pulse or the lack of a pulse within the bit frame.11-04-2010
20090110032Method of Reusing Spreading Codes - A method of wireless data communication. The method includes the step of receiving a feedback indicator signal at two or more points in space from two or more transmission paths. Each transmission path may correspond with a wireless unit seeking to communicate over a downlink and/or an uplink. The method, thereafter, includes the step of measuring a relative phase difference between the feedback indicator signals of two or more transmission paths. Subsequently, one spreading code may be assigned to two or more transmission paths if the measured relative phase difference between their feedback indicator signals corresponds with minimal mutual interference. Consequently, two or more wireless units having a measured relative phase difference in the range of about 90 degrees and about 270 degrees, for example, may use the at least of the same spreading codes.04-30-2009
20090110031MILLIMETER WAVE BEACONING WITH DIRECTIONAL ANTENNAS - A wireless device comprises a code-assignment module configured for assigning Golay codes to be used for spreading, a spreading module configured for spreading data with the Golay codes to produce a signal, wherein the Golay codes are randomly used to spread the data, and a transmitter configured for transmitting the signal. The wireless device may transmit a first beacon signal via a set of quasi-omni beam patterns, and a second beacon signal via a set directional beam patterns. The first beacon signal has a first transmission rate that is higher than the second beacon signal's the transmission rate. Extended Golay codes having zero periodic cross-correlation may be generated from a Golay code and a set of short sequences. A data block transmitted by the wireless device may comprise Golay codes and data portions, wherein every data portion is between two Golay codes and every Golay code is between two data portions.04-30-2009
20090190631METHOD FOR GENERATING A SPREAD SPECTRUM CLOCK AND APPARATUS THEREOF - A method for generating a spread spectrum clock includes the steps of providing a reference clock having a reference period; generating a plurality of output clocks respectively having different phases according to the reference clock; generating a first/second control signal according to the reference clock and a spread spectrum clock and starting a first/second duration accordingly; during the first/second duration, outputting a first/second selecting signal representing a first/second predetermined sequence according to the first/second control signal, wherein the second predetermined sequence is a substantial reversed sequence of the first predetermined sequence; and during the first/second duration, sequentially outputting some or all of the output clocks as the spread spectrum clock according to the first/second predetermined sequence.07-30-2009
20100303126Signal Modulation Method - The present invention provides a signal modulation method which includes the following steps: a input signal is channel encoded, and the channel encoded signal is processed by the following one or several ways: channel scrambling, interleaving, duplicating and puncturing; the signal being processed is divided into two components I and Q, wherein the two components I and Q compose a signal pair; the signal pair is divided into more than one path, and respective path of signal is quadrature phase shift keying spectrum spreading modulated using different spectrum spreading sequence and is orthogonally modulated in order that the peak-to-average power ratio of the respective paths of signal being orthogonally modulated are obtained; and a path of signal having the smallest peak-to-average power ratio is selected to be outputted as an output signal. The signal modulation method can reduce the signal PAPR significantly, not only is propitious to the design of the power amplifier, but also reduces the cost of the power amplifier.12-02-2010
20100309951TRANSMIT-REFERENCE METHODS IN SOFTWARE DEFINED RADIO PLATFORMS FOR COMMUNICATION IN HARSH PROPAGATION ENVIRONMENTS AND SYSTEMS THEREOF - A method for adaptive Radio Frequency (RF) jamming according to one embodiment includes dynamically monitoring a RF spectrum; detecting any undesired signals in real time from the RF spectrum; and sending a directional countermeasure signal to jam the undesired signals. A method for adaptive Radio Frequency (RF) communications according to another embodiment includes transmitting a data pulse in a RF spectrum; and transmitting a reference pulse separated by a predetermined period of time from the data pulse; wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated. A method for adaptive Radio Frequency (RF) communications according to yet another embodiment includes receiving a data pulse in a RF spectrum; and receiving a reference pulse separated in time from the data pulse, wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated; and demodulating the pulses.12-09-2010
20100329309 ADVANCED TELEVISION SYSTEMS COMMITTEE (ATSC) DIGITAL TELEVISION (DTV) RECEIVER - A computer system may comprise a receiver to perform equalization. The receiver comprises an equalizer. The equalizer may determine locations of a principal tap, a platform noise tap, and a pre-cursor tap in a feedforward path of an equalizer. Also, the equalizer may determine locations of a post-cursor tap, a cross-term tap, and a portable tap in a feedback path of the equalizer. The receiver may align the portable tap in the feedback path with the principal tap in the feedforward path. The platform noise tap may cancel the effect of platform noise on a principal located at the principal tap, thus enabling the computer system to operate effectively in severe platform noise environment. Also, the computer system may operate in statics and portable environment in which platform noise and AGWN may be present.12-30-2010
20110019715ASYMMETRICAL RECEIVERS FOR WIRELESS COMMUNICATION - System(s) and method(s) are provided to configure receivers in a mobile device to mitigate receiver overload and fully or nearly-fully utilize available spectrum for communication. Configuration is dictated at least in part by at least one of radio link quality or available receiver specifications, and it can be effected by the mobile device or a base station that serves the mobile device. Receiver configuration includes various spectrally asymmetric receivers that tune respective disparate portions of the available spectrum to maximize utilization thereof in the spectral regions prone to overload conditions. In severe overload conditions, a single receiver can be configured to operate in a frequency band spectrally adjacent to a sub-band that leads to overload conditions when employed for telecommunication. To improve performance, the single receiver configuration can be supplemented with at least one of transmit diversity operation, asymmetric multicarrier spreading, or downlink power boost of asymmetrical multicarrier spreading.01-27-2011
20110044376METHOD OF TRANSMITTING DATA TO A RECEIVER - A method of transmitting data to a receiver, wherein the data is transmitted using a plurality of sub-carriers, is provided. The method provided includes determining, for each sub-carrier and for each of a plurality of combinations of the sub-carrier and an antenna of a plurality of antennas to be used for transmitting the data, a transmission characteristic of a transmission of the sub-carrier using the antenna; and selecting, for each sub-carrier, an antenna of the plurality of antennas to be used for the transmission of the sub-carrier based on the transmission characteristic of the transmission of the sub-carrier between the antenna and the receiver.02-24-2011
20110211615COMMUNICATION SYSTEM AND ITS METHOD - Communication performance is to be improved in a communication system in which a plurality of wireless communication lines share space. A transmitting device 09-01-2011
20090016410Generating A Time Deterministic, Spectrally Noncoherent Signal - According to one embodiment, a system for generating a signal includes a monocycle generator, one or more temporal modulators, and a pulse shaper. The monocycle generator generates monocycles that form a signal comprising pulses, where a pulse corresponds to one or more monocycles. The temporal modulators provide instructions the monocycle generator to create a specific spectral response in the signal. A pulse shaper individually modulates at least one monocycle of the monocycles corresponding to a pulse to shape the pulse.01-15-2009
20100226412WIRELESS DEVICE AND METHOD - A wireless device performs background scanning of one or more radio channels in a wireless network by sending a signal to one or more other devices connected to the wireless network that the device is entering a pre-defined hibernation mode. The background scanning is then performed whilst the other devices on the network consider the device to be in hibernation mode.09-09-2010
20090022207Method for Generating Communication Signal Sequences Having Desirable Correlation Properties and System for Using Same - A method for generating code sequences having good correlation properties comprising steps of selecting a code length comprising a number of chips, selecting a ruler which defines the position of non-zero values within the chips, and overlaying the non-zero values with an amplitude pattern.01-22-2009
20090323767RADIO FREQUENCY DISTRIBUTION WITH SPREADING - A system for distributing a radio frequency (RF) signal using a data cable system includes a method and apparatus with components that receive the RF signal, determine the passband of the data cable system, spread the RF signal within the passband as a spread signal, insert the spread signal into the cable system, extract the spread signal from the data cable system as an extracted signal, convert the extracted signal to a transmission frequency as a converted signal, and transmit the converted signal.12-31-2009
20110150038SYSTEM AND METHOD FOR UWB TRANSMISSION PREDISTORTION AND RF WIRE-BOND INTERFACE TECHNIQUE RELATED APPLICATION - A method and a system, the system includes: an analog base-band pre-distorter arranged to receive in-phase (I) baseband signals and Quadrature (Q) baseband signals, and to amplify the I baseband signals and the Q baseband signals by a gain function to provide amplified I baseband signals and amplified Q baseband signals; wherein the gain function is responsive to a sum of (a) a square of amplitudes of the I baseband signals and, (b) a square of amplitudes of the B baseband signals; a frequency converter arranged to convert the amplified I and Q baseband signals to radio frequency (RF) signals; an RF amplifier that is arranged to amplify the RF signals to provide amplified RF signals and to output differential RF signals that represent the amplified RF signals through first and second differential output ports of the RF amplifier; a balun comprising a first and second balanced input ports and a single unbalanced output port; and multiple wire-bonds coupled between the balun and the first and second differential output ports of the RF amplifier; wherein at least one wire-bond serve as potential shunt inductor.06-23-2011
20100054305SYSTEM INCLUDING CAPACITIVELY COUPLED ELECTRODES AND CIRCUITS IN A NETWORK - A system including a first electrode, a second electrode, a first circuit and a second circuit. The second electrode is capacitively coupled to the first electrode. The first circuit is configured to receive data via a network and transmit a signal via the first electrode based on the data. The second circuit is configured to receive data via the network and receive a current that corresponds to the signal via the second electrode based on the data.03-04-2010
20100054306SIGNAL TRANSMITTING METHOD AND DEVICE AND INFORMATION DETECTING DEVICE - A signal transmitting device detects information on respective frequencies of a plurality of subcarriers configuring an interference signal and information on respective voltage values of the subcarrier from the received interference signal, and modulates data according to the ultra-wideband scheme through subcarriers of part of predetermined bandwidths based on frequency information and voltage value information to generate ultra-wideband signals. Accordingly, signal interference with a heterogeneous communication device can be reduced by detecting an interference signal when an absolute value of the interference signal is small or noise power of the interference signal is large.03-04-2010
20100135359RADIO COMMUNICATION DEVICE AND CONSTELLATION CONTROL METHOD - Provided is a radio communication device which can make ACK reception quality and NACK reception quality to be equal to each other. The device includes: a scrambling unit (06-03-2010
20100135358Low power, high resolution timing generator for ultra-wide bandwidth communication systems - A control generator is provided, comprising: a summer configured to add a ramping phase adjustment signal and a basic phase adjustment signal to generate a combined phase adjustment signal based on the combined phase adjustment signal; a look-up table configured to generate first through N06-03-2010
20090028217Ultra-wideband (UWB) frequency synthesizer system and method - An ultra-wideband (UWB) frequency synthesizer is provided for use in UWB communication. The UWB frequency synthesizer may include a first section and a second section. The first section may be configured to generate a first plurality of frequencies. The second section may be coupled to the first section and configured to generate a second plurality of frequencies respectively corresponding to individual channels of UWB bandwidth based upon the first plurality of frequencies. Further, the first section is configured to include a voltage-controlled oscillator (VCO) providing a base frequency fvco corresponding to the UWB bandwidth, and to generate the first plurality of frequencies based on a single phase-locked loop (PLL) and a reference frequency provided to the single PLL based on the base frequency fvco.01-29-2009
20090028216METHOD AND APPARATUS FOR GENERATING A RADIO FREQUENCY PULSE - The invention is a method and circuit for generating a pulsed periodic signal comprising a sub-harmonic mixer and a control circuit adapted to cause the output signal of the sub-harmonic mixer to be pulsed.01-29-2009
20110249702METHOD AND DEVICE FOR ESTIMATING PARAMETERS OF A SYSTEM FOR SPREADING THE SPECTRUM OF A CLOCK SIGNAL - A method to estimate parameters of a system to spread a spectrum of a first periodic signal according to a modulation period. An embodiment comprises sampling the first signal using a second periodic signal, determining based on the sampling result each occurrence where the first and second signals are synchronous, incrementing a first counter at each sampling, the first counter being reset at each said occurrence, storing at each said occurrence the last value of the first counter before the resetting, providing a third periodic signal at a first level when said last value is greater than a threshold and at a second level when said last value is smaller than the threshold, and determining the modulation period based on the period of the third signal.10-13-2011
20100124252APPARATUS AND METHOD FOR COMMUNICATION - A communication apparatus generates a digital detection signal including a plurality of time symbols by digital-converting a detection signal corresponding to a received signal, estimates an average power value of the detection signal by calculating average power of the digital detection signal based on the digital detection signal, and performs UWB communication through a predetermined first channel when a predetermined reference power value is greater than the average power value.05-20-2010
20110069739BANDPASS FILTER AND RADIO COMMUNICATION MODULE AND RADIO COMMUNICATION DEVICE USING THE SAME - Provided are a bandpass filter and a radio communication module and a radio communication device using the same. The bandpass filter includes: a first and a second grounding electrode arranged on the upper and the lower surface of a layered body; single resonance electrodes and composite resonance electrodes arranged to orthogonally intersect the single resonance electrodes; a first input coupling electrode opposing to the single resonance electrode of the input stage and a second input coupling electrode connected thereto and opposing to the composite resonance electrode of the input stage; a first output coupling electrode opposing to the single resonance electrode of the output stage and a second output coupling electrode connected thereto and opposing to the composite resonance electrode of the output stage.03-24-2011
20110069736METHOD AND APPARATUS FOR CANCELING PILOT INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.03-24-2011
20110069737TRANSMISSION OF SIGNALING IN AN OFDM-BASED SYSTEM - Techniques for efficiently transmitting various types of signaling on the forward and reverse links in an OFDM-based system are described. Instead of specifically allocating subbands to individual signaling channels, signaling data for a signaling channel on a given link is sent as “underlay” to other transmissions that may be sent on the same link. Each wireless terminal is assigned a different PN code. The signaling data for each terminal is spectrally spread over all or a portion of the system bandwidth using the assigned PN code. For the reverse link, a wireless terminal may transmit signaling on all N usable subbands and may transmit traffic data on L subbands assigned for data transmission, which may be a subset of the N usable subbands. For the forward link, a base station may transmit signaling and traffic data for all terminals on the N usable subbands.03-24-2011
20120201274Ultra-wideband dual band magnitude summer apparatus and method - This invention relates to capturing and processing the full bandwidth of an Ultra-Wideband (UWB) signal. An incoming UWB signal is processed in two different analog signal bands in parallel and their magnitudes summed to facilitate a Field programmable gate array (FPGA) processing of the entire UWB bandwidth to minimize digital implementation loss and promote a higher range.08-09-2012
20110150039DEVICE FOR DATA TRANSFER, COMPUTED TOMOGRAPHY APPARATUS AND METHOD FOR DATA TRANSFER - In a device and a method for data transfer between a rotatable part and stationary part of a gantry of a computed tomography apparatus a broadband transmission link is used for data between the rotatable part and the stationary part of the gantry, via which both measurement data and operating data of the computed tomography apparatus are transferred. An arrangement also is provided for narrowband transmission of data of the computed tomography apparatus via the broadband transmission link. The data of the computed tomography apparatus are transmitted using a frequency spread method via the broadband transmission link.06-23-2011
20100303127Vehicle compartment wireless communications apparatus - It is determined whether each of several subcarriers has an adequate propagation characteristic in a first horizontally polarized wave antenna. Of the several subcarriers, a subcarrier, which is determined to have an adequate propagation characteristic in the first horizontally polarized wave antenna, is assigned with transmission data. A transmission signal containing the transmission data is thereby transmitted from the first horizontally polarized wave antenna. In addition, of the several subcarriers, a subcarrier, which is determined not to have an adequate propagation characteristic in the first horizontally polarized wave antenna, is also assigned with transmission data in either a second horizontally polarized wave antenna or a vertically polarized, wave antenna. A transmission signal containing the transmission data is thus transmitted from the second horizontally polarized wave antenna or the vertically polarized wave antenna.12-02-2010
20100260231Blind Detection of the Transport Format (TF) of a Signal - The transport format (TF) of a signal may be blindly detected from a reduced set of TF hypotheses. In an example embodiment, a method for the blind detection of a TF of a signal includes filtering a set of transport format hypotheses to identify a reduced set of TF hypotheses using one or more filtering schemes. From the reduced set of TF hypotheses, a TF that is associated with an interfering signal is detected. The TF includes a modulation and a spreading factor for the interfering signal. It may also include a number of channelization codes. In an example implementation, when an interfering signal is to be canceled, symbols carried by the signal are detected using the detected TF. Example filtering schemes include filtering based on system design/operation, filtering based on known configuration information, filtering based on an expected level of interference contribution, and so forth.10-14-2010
20100254430METHOD FOR DIRECT CHAOTIC COMMUNICATIONS WITH PREDETERMINED SPECTRAL MASK - Spread spectrum transmission of information is performed using chaotic signals. Direct chaotic communication systems in which information is input to chaotic signal generated directly in information transmission frequency band, are achieved by forming broadband information carrier necessary for transmission and using a chaotic dynamic system whose structure is synthesized in advance in accordance with predetermined characteristics of broadband information carrier to cause chaotic dynamic system to provide operation of forming the broadband information carrier in form of a chaotic information carrier having prescribed spectral characteristics. Modulating the chaotic information carrier is carried out by forming chaotic radio or optic chaotic pulses from chaotic information carrier, with predetermined time intervals between pulses in accordance with the transmitted information signal, and the reception and demodulation at the receiving side is carried out using a dynamic system matched, in behavior, with chaotic dynamic system of transmitting side.10-07-2010
20080317098Low Power Radio Device With Reduced Interference - A low power radio device, operable in a first radio system, comprising: a detector for detecting the polarization of an antenna of a further radio device, operating in a further radio system, different to the first radio system; and a transmitter for controlling the polarization of a transmitted radio signal in dependence on the detected polarization. The polarization of the transmitted signal may be controlled to be substantially orthogonal to the polarization of the antenna of the further radio device.12-25-2008
20090323769SEGMENT-WISE CHANNEL EQUALIZATION BASED DATA ESTIMATION - Data is estimated of a plurality of received spread spectrum signals by a wireless communication apparatus. The plurality of received communications are received in a shared spectrum. The received communications are sampled to produce a received vector of sequential samples. The received vector is processed to produce a plurality of segments. Each segment is processed separately to estimate data of the received communications.12-31-2009
20110150040APPARATUS OF 60 GHZ BAND MODEM - An ultra wideband (UWB) communication modem includes an interface configured to transceive data in connection with a host device, a baseband processor configured to process, in a parallel manner, a baseband signal being transceived between the interface and a parallel/serial converter, the parallel/serial converter configured to combine a parallel signal into a serial signal and output the serial signal, and separate a serial signal into a parallel signal and output the parallel signal, a radio frequency (RF) processor configured to reduce a frequency of a received UWB signal and transmit the frequency-reduced signal to the parallel/serial converter, and increase a frequency of the serial signal received from the parallel/serial converter and transmit the frequency-increased signal to a directional antenna, and the directional antenna configured to transceive a wireless signal by forming a directional beam and control a direction of the directional beam.06-23-2011
20090180518Ultrawideband Radio Transmitting Apparatus, Ultrawideband Radio Receiving Apparatus, And Ultrawideband Radio Transmitting-Receiving Apparatus - A digital data that includes at least two bits is input to a chirp modulation unit. On the basis of either one of these two bits, a frequency variable range is selected as either a frequency variable range between a frequency f07-16-2009
20110255569METHOD FOR SENDING PULSES IN A TRANSMISSION CHANNEL - A method and apparatus are provided for sending pulses from a sender device to a receiver device in a transmission channel. The pulses represent information symbols, with each of these pulses being associated with a time slot in a symbol time. The method includes a training step that is carried out before sending payload information and that includes sending a training sequence made up of two parts. A first part of the training sequence includes at least one pulse of energy that is greater than the energy of a pulse carrying payload information. There are a large number of time slots between the sending of the pulse and the sending of the next pulse. A second part of the training sequence includes a set of pulses known in advance and similar to the pulses used for carrying payload information, the energy of each of these pulses being equivalent to the energy of a pulse carrying payload information.10-20-2011
20080205486Ultra wide band pulse generator provided with an integrated function for digital filtering emulation, and transmission method - An embodiment of the invention relates to a method for transmission by ultra-wide-band pulses of digital data formed with a flow of information elements, this method comprising at least one operation including sequentially encoding the information elements by modulating an oscillating signal In order to avoid the use of a bandpass filter, the oscillating signal is modulated in amplitude depending on the identity or dissimilarity of each information element relative to the preceding information element.08-28-2008
20110164657OBJECT LOCATION AND REPORTING SYSTEM FOR HARSH RF ENVIRONMENTS - A system verifies torquing of pressure fittings in an aircraft wheel well. A strain gauge and an ultra-wide band (UWB) pulse signal generator are placed on a wrench used to torque the fittings. The strain senses the torque applied by the wrench, and the pulse signal generator generates UWB pulse signals indicating the location of the fitting and the torque applied to the fitting. The pulse signals are received by UWB radios within the wheel well, which generate location measurements based on the received pulse signals. A processor automatically calculates the location of the fitting being torqued based on the location measurements, and a display produces a 3-dimensional image of the fittings and their torque status.07-07-2011
20110164658METHOD FOR SPREADING THE SPECTRUM OF A NARROWBAND SIGNAL - A method for spreading a spectrum of a narrowband signal, e.g. a monochromatic optical signal or a radiofrequency carrier. The method uses a phase modulation using a modulation signal that includes a plurality of sinusoidal components, the plurality including a component at a fundamental frequency and at least one component at a frequency that is a harmonic of the fundamental frequency, the sinusoidal components being synchronous and affected with phases respectively equal to consecutive multiples of π/2.07-07-2011
20090110030HIGH BANDWIDTH DATA TRANSPORT SYSTEM - A device for sending and receiving ultra wideband communications over a guided medium includes a line interface configured for electrical communication to the guided medium and adapted for interfacing with the guided medium, an ultra wideband impulse transmitter electrically connected to the line interface for transmitting amplitude modulated ultra wideband impulses over the guided medium, and an ultra wideband receiver electrically connected to the line interface for receiving amplitude modulated ultra wideband impulses over the guided medium.04-30-2009
20100329308 METHOD, APPARATUS AND COMPUTER READABLE STORAGE MEDIUM - Embodiments of the invention relate to a method, apparatus and computer readable storage medium wherein the method comprises; padding a data block of a data structure to enable encoding of the data block; encoding the data block; reducing the size of the encoded data block; and spreading the data block.12-30-2010
20110038397SPREAD-SPECTRUM GENERATOR - A spread-spectrum generator is provided. The spread-spectrum generator includes a delay module and a control module. The delay module is controlled by a first control signal to delay an input signal by a delay time, and thereby generate a delay signal. The control module is coupled to the delay module for detecting a first edge of the delay signal, and thereby generating the first control signal. Accordingly, the spread-spectrum generator can spread the frequency of the input signal by delaying the input signal by various delay time, and the spread-spectrum generator can also reduce electromagnetic interference (EMI).02-17-2011
20110261858Radio Base Station and User Equipment and Methods Therein - Embodiments herein include a method in a user equipment (UE) for transmitting uplink control information in time slots of a subframe over a radio channel to a radio base station. The uplink control information is comprised in a block of bits.10-27-2011
20110261860ANTENNA SELECTION AND TRAINING USING A SPATIAL SPREADING MATRIX FOR USE IN A WIRELESS MIMO COMMUNICATION SYSTEM - A wireless communication system and method uses a spatial spreading matrix to distribute the encoded spatial data streams to a number of transmit chains and further uses the spatial spreading matrix for antenna selection computation in a transmitter. The spatial spreading matrix is designed such that a receiver is able to know and utilize the spatial spreading matrix for computing transmission antenna selection, receiver antenna selection and joint transmission/receiving antenna selection. The use of this spatial spreading matrix for antenna selection computation provides increased accuracy in antenna selection for transmission of spatial data streams, where the number of spatial data streams is less than the number of transmit or receive chains between the transmitter and receiver, and the number of transmit or receive chains is less than the corresponding transmission or receiving antennas.10-27-2011
20100183048COMMUNICATION SYSTEM AND ITS METHOD - In a communication system including a plurality of pairs of a transmitting device 07-22-2010
20110305260SYSTEM AND METHOD OF REFERENCE POSITION DETERMINATION - A method of reference position determination for a DGNSS base station. The base station comprises a memory, a logic controller and a GNSS receiver. Stored reference positions are stored in the memory as coordinate sets comprising components. The GNSS receiver determines a current estimate position of the base station as a coordinate set comprising components. The logic controller retrieves a stored reference position, converts the components of the stored reference position and the current estimate position to binary string format. The current estimate position is matched to the stored reference position by matching the binary string format components of the current estimate position with the binary string format components of the stored reference position. If the stored reference position is matched to the current estimate position, the base station is assigned the stored reference position as its reference position.12-15-2011
20080219322Methods and apparatus for emitter detection - A method is provided for coordinating detection of emitted signals by a receiver with transmission of signals by a transmitter, wherein the receiver and the transmitter are located on the same platform. The receiver scans a surrounding environment to detect emitted signals in multiple frequency ranges while the transmitter transmits signals in a predetermined frequency range. The receiver may employ dwells which may be defined as receiver configurations. A dwell, when executed, may be used to detect signals in a certain frequency range. If a frequency range of the dwell conflicts with the frequency range of transmitter signals, which may result in interference of transmitter signals with detection of emitted signals, execution of the dwell may be delayed. If the frequency range of the dwell is such that transmitter signals do not interfere with execution of the dwell, the dwell can be executed.09-11-2008
20110096810Data-Block Spread Spectrum Communications System - A spectrum spread communication method includes a step of generating a data block formed by a plurality of M bits of transmission data in the CDMA communication method, a step of modulating an orthogonal sinusoidal wave by the repeated series of the data block to generate a spread symbol, a step of transmitting the symbol, a step of performing reverse spread of the reception input by using the orthogonal sinusoidal wave, thereby completely isolating the multi-user component including the multi rate.04-28-2011
20110096811Method and an apparatus for adaptively learning a sparse impulse response of a continuous channel - A method for adaptively learning a sparse impulse response (04-28-2011
20090323768SPREAD SPECTRUM CLOCK SIGNAL GENERATOR - A spread spectrum clock signal generator for spreading an input clock signal into an output clock signal includes a clock signal delay chain for delaying the input clock signal into a delay clock signal group having a plurality of delay clock signals, a modulation controller for outputting a counter clock signal control signal, a clock signal selection circuit for selecting, from the delay clock signal group, a modulation clock signal group having a plurality of modulation clock signals, a programmable counter for generating a counting value according to a counter clock signal, and a clock signal output unit for combining the modulation clock signals into the output clock signal according to the counting value, and further generating the counter clock signal, outputted to the programmable counter, according to the counter clock signal control signal.12-31-2009
20110182325SPACE-TIME CODING/DECODING METHOD FOR A DUAL-ANTENNA PULSE UWB COMMUNICATION SYSTEM - This invention relates to a space-time coding method for a UWB transmission system comprising two radiation elements. This method codes a block of information symbols (S=(a07-28-2011
20100166038DEVICE AND METHOD OF FEEDING BACK CHANNEL INFORMATION - Provided is a channel information feedback method for a multiple input multiple output (MIMO) communication system. A terminal may provide feedback information generated by manipulating estimates of downlink channels using a plurality of spreading sequences. A base station may processes the feedback information provided from the terminal, and recognize channel information for each downlink channel.07-01-2010
20100166037UWB TRANSMISSION APPARATUS AND UWB TRANSMISSION METHOD - A UWB transmission apparatus that, in a system using a mixture of amplitude and phase modulation schemes, can support both of the amplitude and phase modulation schemes, while preventing the signal powers of amplitude-modulated signals from degrading. In this UWB transmission apparatus, if the modulation mode is of QPSK, a mapping part (07-01-2010
20100195699SYSTEM AND METHOD FOR TRANSMITTING AND RECEIVING ULTRA WIDE BAND PULSE OR PULSE SEQUENCE - The present invention provides a method for transmitting and receiving ultra wide band (UWB) signals. By this method, application systems such as wireless UWB communication, wireless UWB positioning and UWB target detecting radar can be achieved. In this method, an UWB device periodically generates pulse signals. In each pulse repetition period, an output signal can be a positive-polarity pulse (positive pulse), or a negative-polarity pulse (negative pulse), or an empty signal (empty signal) without any change. A method of UWB device controlling the output signal to shift between the positive pulse, negative pulse and empty signal is very simple and easy to implement. A transmitter can transmit any variable pulse sequence (the arranging order of the positive pulse, negative pulse and empty signal; the length of the sequence). One or more definite pulse sequences are used to constitute wireless information frame according to certain rules, and functions such as communications, positioning and target detection between one or more transmitters and one or more receivers can be realized. The prevent invention provides a method for generating UWB signals, as well as a low-cost and a high-performance UWB signal receiving method. According to the UWB signal generating and receiving method disclosed in the present invention, the system can very conveniently change (by software control) a central frequency and signal bandwidth of the UWB signals, and therefore can satisfy application requirements in different fields. A plurality of such transceivers can simultaneously work at the same waveband or different wavebands.08-05-2010
20110261859SYSTEMS AND METHODS FOR PCO BASED UWB IMPULSE RADIO WITH LOCALIZED SYNCHRONIZATION DETECTION AND RETENTION - The present invention provides a communications system, node and method of operation for forming a wireless network from independently operating nodes that have the ability to self-synchronize with each other, independently determine master and slave modes of operation to cooperate as a network, and independently vary those functions to adjust to changes in the network.10-27-2011
20110051779Spread spectrum clock generating circuit - A spread spectrum generating circuit comprises an external PLL and an internal PLL. The external PLL comprises a phase detector, a low-pass filter, a voltage-controlled oscillator and a frequency divider, each of them connecting successively. The frequency divider is connected to the phase detector in order to form an external loop. The internal PLL comprises the phase detector, the low-pass filter and the voltage-controlled oscillator of the external PLL, each of them connecting successively. An output terminal of the voltage-controlled oscillator connects with a counter, and the output terminal of the counter connects to an input of the oscillator in order to form an internal loop. The present invention is compatible with the conventional ones, and has lower design risk and higher circuit reliability; compared with the general circuit, it has drastically reduced the area and power consumption, which allows more flexible design and meets more demands.03-03-2011
20110188541HIGH BANDWIDTH DATA TRANSPORT SYSTEM - The present invention provides for a methods, system, and apparatus relating to data transmission. One method of the present invention includes representing data using at least one ultra wideband pulse, sending the at least one ultra wideband pulse over an electrically conductive guided media, and recovering the data from the at least one ultra wideband pulse. The present invention can be used in conjunction with telephony applications, cable TV applications, power line applications, fiber optic applications, and data bus applications.08-04-2011
20110188540RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS AND COMMUNICATION CONTROL METHOD - The present invention provides a radio communication system which includes a plurality of radio base station apparatuses that transmit reference signals orthogonal to each other among a plurality of transmitting antennas and a mobile terminal apparatus that performs channel estimation based on the reference signals transmitted from the plurality of radio base station apparatuses, sets priority among a plurality of neighboring radio base station apparatuses and introduces a bias in the number of reference signals that can be allocated to each radio base station apparatus according to the priority from the radio resources shared among the plurality of neighboring radio base station apparatuses.08-04-2011
20100020851TRANSMITTED REFERENCE SIGNALING SCHEME - A signaling scheme employs transmitted reference pulses having varying phase. The phase of the reference pulses may be varied in a random manner or in accordance with a data stream. In some aspects a transmitter modulates the phase of the reference pulses to encode an additional data stream in a transmitted reference signal. In some aspects these techniques are employed in a heterogeneous network including coherent and non-coherent receivers. In some aspects these techniques may be employed in an ultra-wide band system.01-28-2010
20100020850METHOD FOR ESTIMATING THE TIME OF ARRIVAL IN ULTRA WIDEBAND SYSTEMS - Method and device for estimating the time-of-arrival of a received signal y(t), said method comprising the step of: generating a plurality of frequency-domain samples from the received signal y(t); estimating a correlation matrix (Formula I) from said plurality of frequency-domain samples; from said correlation matrix (Formula I), calculating a signal energy distribution with respect to different propagation delays; finding a delay value (Formula II) at which said signal energy distribution exceeds a certain threshold P01-28-2010
20110216807SUB-BAND ADAPTIVE FIR-FILTERING - A method for designing a set of sub-band FIR filters, where each FIR filter has a number of filter coefficients and is connected to an adjustable delay line. The method includes dividing an input signal into a number of sub-band signals, where a spectrum of the input signal comprises spectra of the sub-band signals; providing a respective goal sub-band signal for each sub-band dependent on a goal signal; filtering and delaying each sub-band signal using a corresponding FIR filter and delay line to provide filtered signals; providing error signals for each sub-band dependent on the filtered signals and the corresponding goal signals; adapting the filter coefficients of each sub-band FIR filter such that the respective filtered signal approximately matches a corresponding goal sub-band signal; and changing a respective delay of the delay line for each sub-band to reduce or increase a first quality criterion.09-08-2011
20120147928RADIO COMMUNICATION APPARATUS - In UWB communication based on an MB-OFDM communication scheme, when a jamming interference is detected within a receiving frequency band, the frequency of a local signal LO is altered to a frequency that will cause the jamming to be converted to a frequency outside the pass band of an LPF.06-14-2012
20120307868METHOD, BASE STATION, AND TERMINAL FOR GENERATING REFERENCE SIGNAL - The present invention relates to a method for generating a reference signal, including: obtaining first control information, where the first control information indicates or includes cyclic shift related information which is used by a terminal belonging to a serving cell to send a reference signal; and sending the first control information to the terminal belonging to the serving cell, so that the terminal belonging to the serving cell generates the reference signal according to the cyclic shift related information which is indicated or included by the first control information and used by the terminal to send the reference signal, where a variation rule of a cyclic shift which the terminal belonging to the serving cell uses to generate the reference signal is the same as that of a cyclic shift which a terminal belonging to a coordinated cell uses to generate the reference signal.12-06-2012
20110019716CLOCK GENERATING CIRCUIT, TRANSCEIVER AND RELATED METHOD - A clock generating circuit includes: a phase detector for detecting a phase difference between an input clock and a reference clock to generate a control signal corresponding to the phase difference; a filter for filtering the control signal to generate a filtered control signal; a controllable oscillator for generating a plurality of output clocks according to the filtered control signal, wherein the plurality of output clocks correspond to an oscillating frequency and correspond to a plurality of different phases respectively; a phase selector for selecting an output clock as a feedback clock from the plurality of output clocks according to a phase select signal; and a feedback circuit for generating the input clock according to the feedback clock.01-27-2011
20110069738RECEPTION DEVICE - A reception device according to the present invention is provided with an expander for frequency-converting a reception signal by multiplying a station-transmitted signal output from an oscillator and having a frequency different from a center frequency of the reception signal and the reception signal and outputting an intermediate signal. The oscillator intermittently operates in synchronization with generation timings of short pulse waves included in the reception signal. Thus, the reception device according to the present invention can reduce power consumption more using a UWB communication system.03-24-2011
20090028218USB system with spread spectrum EMI reduction - A method for applying spread spectrum noise reduction techniques to USB specifically USB2.0 communications systems includes the step of generating a base (seed) frequency for the USB system, modulating the base (seed) frequency with a spread spectrum (SS) characteristic, and utilizing (as-is, not modified) the existing ASIC that multiplying the now modulated base (seed) frequency to generate the USB standard frequency signaling rate of 480 MHz with the SS characteristic within the USB standard specification for frequency deviation.01-29-2009
20120039363RADIO RECEPTION APPARATUS AND RADIO RECEPTION METHOD - A radio transmission apparatus performs communications with high transmission efficiency. In this apparatus, a modulator modulates data and outputs to a first spreader. A second modulator modulates data under a modulation scheme having a higher M-ary number than the first modulator and outputs the modulated data to a second spreader. The first spreader spreads the data and outputs the spread data to a frequency domain mapping section. The second spreader spreads the data and outputs the spread data to a time domain mapping section. A frequency domain mapping section maps chips with spread data on subcarriers in the frequency domain and outputs the data with chips mapped on subcarriers to an IFFT section. The time domain mapping section maps chips with spread data on subcarriers in the time domain and outputs the data with chips mapped on subcarriers to the IFFT section.02-16-2012
20100014558SYSTEM AND METHOD FOR COMMUNICATING DATA USING CONSTANT RADIUS ORTHOGONAL WALSH MODULATION - A radio device includes a transmitter having a modulator for generating M-PAM communications symbols containing communications data. A Fast Walsh Transform circuit orthogonally encodes and band-spreads the communications symbols using the Fast Walsh Transform. A frequency modulation circuit frequency modulates the communications symbols wherein a constant radius orthogonal Walsh modulated communications signal containing the communications data is generated.01-21-2010
20120099619METHOD FOR INTERFERENCE CONTROL BY AN ULTRA-WIDEBAND WIRELESS COMMUNICATION SYSTEM IN A MULTI-USER ENVIRONMENT AND A RECEIVER FOR PERFORMING THE SAME - An Ultra-Wideband (UWB) wireless communication system in a multi-user environment determines a threshold value to eliminate a signal pulse affected by a near-interference from among a plurality of signal pulses transmitted a number of times. A method for controlling an interference includes receiving the signal pulses, calculating a correlation value by applying a predetermined correlation mask to the signal pulses, determining a threshold value by referring to the number of times that the signal pulses are transmitted, a signal-to-interference-and-noise ratio, and information about a ratio of a near-interference to a far-interference, and eliminating signal pulses having a correlation value greater than the threshold value. The correlation values that are not greater than the threshold value are summed to detect a bit corresponding to each pulse signal.04-26-2012
20080212650COGNITIVE UWB SYSTEM AND COGNITIVE UWB DATA COMMUNICATION METHOD - A cognitive UWB system and a cognitive UWB data communication method. The system includes a cognitive UWB transmitter and a cognitive UWB receiver. The cognitive UWB transmitter includes a channel encoder for correcting error of data, a preamble inserter for inserting a preamble into the data, a mask information inserter for inserting mask information into the data, a cognitive UWB pulse generator for generating a pulse based on the mask information and the channel environment information, a pulse position modulator for modulating the pulse, and a radio frequency transmitter for wirelessly transmitting the data. The cognitive UWB receiver includes a radio frequency receiver for wirelessly receiving data, a synchronizer for synchronizing time of data, a spectrum detector for detecting the channel environment information, a mask information extractor for extracting the mask information, a cognitive UWB pulse generator for generating a pulse, a pulse position modulator for demodulating the pulse, and a channel decoder for correcting error of the demodulated data.09-04-2008
20110064115TRANSMISSION OF INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna.03-17-2011
20110158289RECEPTION SIGNAL INTEGRATING METHOD AND RECEIVER - A reception signal integrating method includes: calculating, in receiving a satellite signal, when a reception signal of the satellite signal is time-divided at an assumed period obtained by estimating code period time of a spread code of the satellite signal, a coefficient representing a period shift between a true period and the assumed period of the spread code using first portions and second portions having an assumed period different from that of the first portions in the reception signal; and integrating the reception signal using the coefficient.06-30-2011
20110158290RADIO COMMUNICATION DEVICE AND CONSTELLATION CONTROL METHOD - Provided is a radio communication device which can make Acknowledgement (ACK) reception quality and Negative Acknowledgement (NACK) reception quality to be equal to each other. The device includes: a scrambling unit (06-30-2011
20090285263ULTRA-WIDEBAND RECEIVER - A receiver for receiving a signal that is representative of a plurality of sub-carriers modulated in dependence on transmit data, the receiver being arranged to determine a plurality of candidate vectors in dependence on the received signal, each of the candidate vectors being indicative of a modulation applied to a respective one of the sub-carriers, the receiver being further arranged to determine that the received signal incorporates a predetermined level of interference in respect of one or more of the sub-carriers and adjust one or more of the candidate vectors in dependence on that determination and determine the transmit data in dependence on the one or more adjusted candidate vectors, the receiver being arranged to adjust the one or more candidate vectors so as to reduce an influence that the candidate vectors indicative of the one or more sub-carriers would otherwise have had on the determination of the transmit data.11-19-2009
20090034585DEMODULATION METHOD AND DEVICE, EQUALIZATION METHOD AND SYSTEM IN TRANSMITTING DIVERSITY MODE - A demodulation method and device, an equalization method and system in a transmitting diversity mode are provided. The demodulation method includes: demodulating two equalized equalization signals respectively through a transmitting diversity mode; and then performing a maximum ratio combination on the demodulated signals. According to embodiments of the present invention, the two equalized signals are respectively demodulated according to a transmitting diversity mode, and then a maximum ratio combination is performed on the two signals to get a demodulated signal, which improves the performance of the demodulated signal and the equalization system.02-05-2009
20120014411CONSTANT AMPLITUDE DECODING APPARATUS AND METHOD FOR MULTIPLEXED DIRECT-SEQUENCE SPREAD COMMUNICATION SYSTEM - A constant amplitude decoding apparatus and method for multiplexed direct-sequence spread spectrum communication system are provided. The constant amplitude decoding apparatus includes: a despreading and demultiplexing module receiving a data stream of a constant amplitude and despreading and demultiplexing the received data stream to restore it to a 2D signal; a decoding module first performing a vertical decoding on the 2D signal and then performing horizontal decoding thereon; a control module determining whether to repeatedly perform vertical decoding and horizontal decoding; and a bit stream information output module outputting the decoding results from the decoding module as a bit stream.01-19-2012
20120014412POSITIONING SYSTEM AND POSITIONING METHOD - A positioning system and a positioning method which suppress the occurrence of jitter to improve positioning accuracy. A base station (01-19-2012
20120057618SYSTEM AND METHOD FOR DETECTING VICTIM SIGNAL IN MB-OFDM UWB COMMUNICATION SYSTEM - To detect a victim signal in an ultra wideband communication system, fast Fourier transform of a received signal including a plurality of time symbols is performed to generate a signal including a plurality of frequency symbols, it is determined whether a first signal is present in a first region of the signal, and if a first signal is present, the first signal is detected as a first victim signal. Next, an error signal is generated based on the signal including the plurality of frequency symbols, it is determined whether a second signal is present in a second region of the error signal, and if a second signal is present, the second signal is detected as a second victim signal.03-08-2012
20100226413METHOD AND APPARATUS FOR INCREASING THE NUMBER OF ORTHOGONAL SIGNALS USING BLOCK SPREADING - Embodiments of the invention apply block spreading to transmitted signals to increase the number orthogonally multiplexed signals. The principle of the disclosed invention can be applied to reference signals, acknowledgement signals, and channel quality indication signals. In any given time interval, the set of transmitted signals is defined by two sequences: the baseline sequence, and the block spreading sequence. Different transmitters using the same baseline sequence can be identified by using different block spreading sequences.09-09-2010
20090135885NON-LINEAR FEEDBACK CONTROL LOOPS AS SPREAD SPECTRUM CLOCK GENERATOR - This patent disclosure presents circuits, systems and methods to spread a clock signal to produce a random spreading for the clock signal that offers the maximum possible power density reduction for the spurious radiations generated from the clock signal and its harmonics. These new inventions utilize a non-linear feedback control loop to assist in generation of the spread spectrum clock and result in electronic products that can pass the FCC requirements for spurious radiations generated by the clock signal and its harmonics without utilizing expensive shielding and other EMI suppression methods.05-28-2009
20110007777LOW POWER RADIO SYSTEM - A spread spectrum system may include a transmitter and a receiver. The transmitter is configured to transmit a signal having at least one channel, where the signal may include a reference signal, an information signal and a frequency offset between the reference signal and the information signal. The receiver may receive the transmitted signal from the transmitter and mix the received signal in order to retrieve the information signal from the received signal. This allows the receiver to operate at low power (e.g., 10 uW-100 uW).01-13-2011
20100215075Estimating the Ratio of Traffic Channel Power to Pilot Power in a MIMO Wireless Communication System - Methods and apparatus for processing a received multi-stream (MIMO) signal, and in particular for estimating a per-code traffic-channel-to-pilot power ratio for the MIMO signal are disclosed. An exemplary method includes the calculation of an average symbol amplitude or average symbol power level from a plurality of de-spread traffic channel symbols received in a first transmission slot and the estimation of a corresponding pilot symbol amplitude or pilot symbol power level, based on an estimated propagation channel response and at least one of a plurality of precoding vectors used to generate the MIMO signal. A per-code traffic-channel-to-pilot power ratio for the first transmission slot is computed by dividing the average symbol amplitude or average symbol power level by the corresponding pilot symbol amplitude or pilot symbol power level.08-26-2010
20110103427SYSTEM AND METHOD OF CONTROLLING MODULATION FREQUENCY OF SPREAD-SPECTRUM SIGNAL - An apparatus for generating a spread-spectrum signal based on an input signal whose frequency may vary substantially. The apparatus is particularly suited for controlling the frequency of the modulation in response to wide variations of the frequency of the input signal. This prevents the modulation frequency from deviating into an undesired frequency range which could cause adverse operational effects. The apparatus includes a detector adapted to generate a first signal related to the frequency of the input signal, a controller adapted to generate a second signal for controlling a frequency of a modulation signal based on the first signal, a modulation signal generator adapted to generate the modulation signal based on the second signal, and a spread-spectrum signal generator adapted to generate the spread-spectrum signal based on the modulation signal.05-05-2011
20100290504POSITION INFORMATION PROVIDING SYSTEM INDOOR TRANSMITTER AND METHOD FOR PROVIDING POSITION INFORMATION - It is intended to provide position information in a location where it is difficult for radio waves to penetrate. An indoor transmitter is capable of programmably changing a format of a transmitter signal. A process to be performed by a position information providing apparatus comprises the step (S11-18-2010
20100246634Acquisition of spreading factors (SFS) of multiple transmitted signals in code division multiple access system - A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated based on its signal strength and SF upon acquisition of the SF. This SF may be monitored such that the Interferer weight may be adjusted when the SF changes based on the detected changes. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal.09-30-2010
20100246636Detecting the Presence of Spread Spectrum Signals - The presence of spread spectrum signals in a given frequency range is detected in a receiver by receiving a signal; determining for a measurement frequency an indication signal; and using it as an indication of the presence of spread spectrum signals having a carrier frequency equal to said measurement frequency. An in-phase signal and a quadrature signal are provided by mixing the received signal with an oscillator signal having said measurement frequency; at least one of these signals is phase shifted; a sum signal and a difference signal are generated; and the sum signal is multiplied by the difference signal and low pass filtered. In this way a method and a circuit of detecting the presence of spread spectrum signals in a given frequency range are provided, which are simple and fast enough to be used in low-cost cognitive radios.09-30-2010
20100246637Wireless communication device, wireless communication system, and method for detecting receive timing of direct wave - A wireless communication device and method are capable of detecting a receive timing of a direct wave at higher precision without increasing transmit power. A signal receiver receives a signal having a center frequency changed in a predetermined rule at predetermined time intervals. A time-frequency transformer transforms the received signal from a time domain to a frequency domain. A filter removes frequency-domain signal components unused during reception, based on the predetermined rule, from the frequency-domain signal. A reverse modulator performs a reverse modulation process on the remaining signal components. A signal adder generates an added signal by performing accumulative addition on the signal components that underwent the reverse modulation process in the reverse modulator for a predetermined period. A direct wave arrival time determiner determines an arrival time of a direct wave according to an impulse response obtainable from an output of the frequency-time transformer.09-30-2010
20100246635Methods and apparatus for narrow band interference detection and suppression in ultra-wideband systems - An exemplary method is disclosed to accurately estimate the center frequency of a narrow-band interference (NBI). The exemplary method uses multi-stage autocorrelation-function (ACF) to estimate an NBI frequency. The exemplary method allows an accurate estimation of the center frequency of NBI in an Ultra-Wideband system. A narrow band interference (NBI) estimator based on such a method allows a low complexity hardware implementation. The exemplary method estimates the frequency in multiple stages. Each stage performs an ACF operation on the received signals. The first stage gives an initial estimation and the following stages refine the estimation. The results of all stages are combined to produce the final estimation. An apparatus based on such a multi-stage narrow band interference frequency detector is also disclosed to improve the accuracy by combining various filters with the detector.09-30-2010
20120163416PULSE GENERATOR OF UWB SYSTEM - A pulse generator of an ultra wideband (UWB) system includes: a plurality of delay cells for receiving pulses, delaying the received pulses for a predetermined time, and outputting the delayed pulses; and an edge combiner connected to output ends of the plurality of delay cells for receiving the delayed pulses from the plurality of delay cells, outputting fine pulses corresponding to the delayed time, and generating one impulse signal with the outputted fine pulses. The edge combiner includes a plurality of XOR gates for receiving a first delayed pulse and a second delayed pulse from an n06-28-2012
20120163415Adjacent Channel Rejection Of A CCK Blocker - An adjacent channel interference rejection mechanism is provided to detect and reject CCK-modulated signals from an adjacent channel in a wireless communication receiver. Replicas of the baseband signals are frequency-shifted and then analyzed through a series of correlations to compare the power of the correlation outputs. An adjacent channel interference of a CCK-modulated signal is determined and rejected based on the comparisons meeting a predetermined tolerance level.06-28-2012
20120134389PASSIVE WIRELESS CONNECTION - A wireless switch or sensor is provided that includes a radio frequency (RF) transponder including a narrowband receiver operable to generate power from a received narrowband RF signal and an ultra wideband (UWB) transmitter operable to transmit UWB pulses using the generated power.05-31-2012
20090060000Acquisition of spreading factors (SFS) of multiple transmitted signals in code division multiple access system - A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated based on its signal strength and SF upon acquisition of the SF. This SF may be monitored such that the Interferer weight may be adjusted when the SF changes based on the detected changes. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal.03-05-2009
20120250728Recovery and Synchronization for Spread Spectrum Modulated Clock - Embodiments allow for the use of the SS modulation technique (and thus for significant reduction of EMI due to clock transmission) in scenarios involving tight synchronization requirements between two devices. In particular, embodiments can be used in high-speed communication networks (e.g., high-speed Ethernet) where a clock signal embedded in the data stream at the transmitter and recovered from the data stream at the receiver is the only source for synchronization between the transmitter and the receiver (i.e., no other synchronization channel available). Embodiments are also especially useful in communication systems utilizing echo cancellers.10-04-2012
20100061424Spread Spectrum Controller with Bit Error Rate Feedback - A spread spectrum controller that adjusts frequency range subject to a bit error rate (BER). Measuring the bit error rate (BER) at different clock frequency ranges and comparing the BER to a BER threshold. Narrowing or widening the clock frequency range based on whether the BER is above or below the BER threshold to optimize a system for both performance and compliance.03-11-2010
20120177084Frequency Dependent I/Q Imbalance Compensation - A method and system for compensating for frequency dependent phase and amplitude imbalances is provided. A plurality of frequency sub-bands is extracted from a received wideband signal. Each of the plurality of frequency sub-bands is compensated to produce an associated plurality of compensated frequency sub-bands. The compensated sub-bands are summed in order to produce a compensated signal.07-12-2012
20100272150RECEIVING APPARATUS AND RECEIVING METHOD OF IMPULSE-RADIO UWB WIRELESS SYSTEM - A receiving apparatus of an ultra-wideband wireless system includes an analog-to-digital converter for sampling an analog signal into a digital signal, a serial-to-parallel converter for converting serial data input to the analog-to-digital converter into M:N parallel data, a matched filter bank unit for match-filtering the N parallel data, a cross-correlator bank unit for cross-correlating an output of the matched filter bank unit with a ternary code, a preamble boundary detecting unit for receiving an output signal of the cross-correlator bank unit to detect a starting boundary of a ternary code, a multi-path profile calculating unit for receiving an output signal of the cross-correlator bank unit to calculate multi-path phase and amplitude variation, a despreading unit for despreading an output of the matched-filter bank unit using a spreading code, and a data demodulating unit for receiving the despread value to determine a position and phase of a pulse. The receiving apparatus and the receiving method of the UWB wireless system are capable of achieving low power implementation by using a low system clock with a parallel structure, acquiring accurate signal and synchronization, and receiving a baseband signal without modifying the receiving apparatus according to channel change.10-28-2010
20100008399RADIO TRANSMITTER DEVICE - Transmitter device which includes at least: a) one delay line designed to output M signals which are delayed in relation to each other, where M is an integer greater than 1; b) a memory, designed to store at least M digital samples of a waveform, where each digital sample contains N bits, and to output each of the M digital samples successively on N output lines respectively under the control of one of the M delayed signals; and c) a digital-analog converter which includes N inputs linked to N output lines, designed to convert the M digital samples received as input from the N output lines of the memory and to successively output, on an output of the digital-analog converter, each of the M analog converted digital samples which together form an analog signal which is representative of the waveform.01-14-2010
20120189034UWB MULTI-BURST TRANSMIT DRIVER FOR AVERAGING RECEIVERS - A multi-burst transmitter for ultra-wideband (UWB) communication systems generates a sequence of precisely spaced RF bursts from a single trigger event. There are two oscillators in the transmitter circuit, a gated burst rate oscillator and a gated RF burst or RF power output oscillator. The burst rate oscillator produces a relatively low frequency, i.e., MHz, square wave output for a selected transmit cycle, and drives the RF burst oscillator, which produces RF bursts of much higher frequency, i.e., GHz, during the transmit cycle. The frequency of the burst rate oscillator sets the spacing of the RF burst packets. The first oscillator output passes through a bias driver to the second oscillator. The bias driver conditions, e.g., level shifts, the signal from the first oscillator for input into the second oscillator, and also controls the length of each RF burst. A trigger pulse actuates a timing circuit, formed of a flip-flop and associated reset time delay circuit, that controls the operation of the first oscillator, i.e., how long it oscillates (which defines the transmit cycle).07-26-2012
20120082186ULTRA-WIDEBAND SIGNAL AMPLIFIER - Amplifier for an ultra-wideband (UWB) signal receiver having a signal input (04-05-2012
20120082185Embedded Meta-Carrier with Spread Spectrum for Periodic-Burst Carriers via Overlaid Carriers - A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.04-05-2012
20120230369HIGH-SPEED SAMPLING AND LOW-PRECISION QUANTIFICATION PULSE ULTRA-WIDEBAND WIRELESS COMMUNICATION METHOD - For a demand of high speed, low cost and low power loss short distance wireless communication, a high-speed sampling and low-precision quantification pulse ultra-wideband wireless communication method is provided. A baseband narrow pulse sequence is generated at a transmission end using the digital technology by the method, and is transmitted after modulating amplifying and filtering and amplifying at a reception end, after the digital-signal processing of synchronizing, channel estimating, related detecting, and channel decoding, tec, is performed for the quantified data, the transmission information is retrieved. Comparing with the present carrier mechanism UWB wireless communication technology, the method does not need the complex radio frequency processing of orthogonal modulation/demodulation and frequency spectrum moving, etc, the quantification precision of analog-to-digital conversion is also decreased greatly, so the cost and power loss are greatly decreased; comparing with the present pulse mechanism UWB wireless communication technology, the method provided by the present invention greatly increase the data transmission rate, and increases the stability, reliability and integration.09-13-2012
20120230368Spread Spectrum Pilot Signals in an Electronic Duplexer - Interference-reducing circuits include a feed-forward circuit for subtracting all or part of a desired transmitter-signal component from a signal coupled from the power amplifier's output path. The error signal from this feed-forward circuit contains a replica of distortion in the power amplifier output. A cancellation loop adjusts the phase and/or amplitude of this error signal and combines this adjusted error signal with an interference-carrying signal, removing some of the undesired distortion. A spread-spectrum pilot signal is used in one or both loops, to provide a reference signal that can be monitored by an adjustment circuit, which measures the magnitude and/or phase of a spread-spectrum signal that is injected into the interference-carrying signal and, based on that measurement, adjusts the amplitude, phase, and/or delay of the cancellation signal that is added to the interference-carrying signal. This yields a reduced-interference signal in which undesired distortion is reduced.09-13-2012
20110122921LOW POWER, HIGH RESOLUTION TIMING GENERATOR FOR ULTRA-WIDE BANDWIDTH COMMUNICATION SYSTEMS - A data communication method is provided, comprising: processing high-speed digital data for communication to produce processed data; generating short impulse wavelets; constructing a digitally modulated ultra wideband signal from the short impulse wavelets in response to bits of the processed data, wherein the digitally modulated ultra wideband signal comprises a series of the short impulse wavelets, and the value of each bit of the processed data is digitally modulated onto the shape of at least one of the short impulse wavelets of the series, to produce a series of digitally shape modulated impulse wavelets; and transmitting the digitally modulated ultra wideband signal, including the series of digitally shape modulated impulse wavelets, via an antenna.05-26-2011
20110122920METHOD AND DEVICE FOR PROCESSING DATA AND COMMUNICATION SYSTEM COMPRISING SUCH DEVICE - A method and a device are provided for processing first data, wherein said first data are distributed, in particular temporally spread over and/or on top of second data. In addition, a communication system comprising such device is suggested.05-26-2011
20110122919SYNCHRONISING A RECEIVER TO A SIGNAL HAVING KNOWN STRUCTURE - Apparatus for locating a specific point in a received signal of cyclical nature, the apparatus comprising correlating means (05-26-2011
20080298432RANGING SYSTEM AND METHOD - A system for estimating range to an object comprising a system for estimating range to an object comprising a transmitter to transmit at least one UWB signal, a receiver to receive at least one UWB signal, a sampler to sample the received UWB signal depending on a plurality of clock and/or sample pulses having a first frequency, and a circuit and/or processor configured to generate a fractional signal having a second frequency that is lower that the first frequency and a phase that is dependant on the delay between when the UWB signal is actually received and when the received UWB signal is first sampled, and determine the range based on at least a first number of clock or sample pulses between transmitting and receiving the UWB signal and the phase of the fractional signal. Also a method of estimating range to an object.12-04-2008
20120269231ANTENNA SELECTION AND TRAINING USING A SPATIAL SPREADING MATRIX FOR USE IN A WIRELESS MIMO COMMUNICATION SYSTEM - Channel sounding information is received by a first communication device during an antenna selection training procedure. Antenna selection computations are performed, and the computations (i) assume that a second communication device uses a first N10-25-2012
20100232473RADIO COMMUNICATION DEVICE AND RESPONSE SIGNAL SPREADING METHOD - A radio communication device in which the waste of physical resources involved in the repetition transmission of a response signal can be minimized with no restriction on the scheduling of a base station imposed or with the restriction on the scheduling thereof minimized. In this device, a control unit (09-16-2010
20100232472UWB DELAY AND MULTIPLY RECEIVER - An ultra-wideband (UWB) delay and multiply receiver is formed of a receive antenna; a variable gain attenuator connected to the receive antenna; a signal splitter connected to the variable gain attenuator; a multiplier having one input connected to an undelayed signal from the signal splitter and another input connected to a delayed signal from the signal splitter, the delay between the splitter signals being equal to the spacing between pulses from a transmitter whose pulses are being received by the receive antenna; a peak detection circuit connected to the output of the multiplier and connected to the variable gain attenuator to control the variable gain attenuator to maintain a constant amplitude output from the multiplier; and a digital output circuit connected to the output of the multiplier.09-16-2010
20120320946LOW POWER, HIGH RESOLUTION TIMING GENERATOR FOR ULTRA-WIDE BANDWIDTH COMMUNICATION SYSTEMS - A data communication method is provided, comprising: processing high-speed digital data for communication to produce processed data; generating short impulse wavelets; constructing a digitally modulated ultra wideband signal from the short impulse wavelets in response to bits of the processed data, wherein the digitally modulated ultra wideband signal comprises a series of the short impulse wavelets, and the value of each bit of the processed data is digitally modulated onto the shape of at least one of the short impulse wavelets of the series, to produce a series of digitally shape modulated impulse wavelets; and transmitting the digitally modulated ultra wideband signal, including the series of digitally shape modulated impulse wavelets, via an antenna.12-20-2012
20100215076Redundant Signal Transmission - In a method and a device (08-26-2010
20100202493LOW POWER ULTRA WIDEBAND TRANSCEIVER - Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.08-12-2010
20130022082METHOD AND APPARATUS FOR GENERATING REFERENCE SIGNAL - The disclosure discloses a method for generating a reference signal. The method includes: a user equipment receiving a first signaling carrying reference signal solution information sent by a base station, wherein the reference signal solution information has at least one mapping relation with at least one piece of orthogonal code configuration information and at least one hopping mode, and the at least one mapping relation is stored in the base station and the user equipment; determining a corresponding piece of orthogonal code configuration information and a corresponding hopping mode according to the received reference signal solution information and the stored at least one mapping relation; and generating a reference signal according to the determined piece of orthogonal code configuration information and the determined hopping mode.01-24-2013
20130022079METHOD FOR INTEGRATING SIGNALS TRANSMITTED FROM A TRANSMITTER TO AT LEAST ONE ULTRA WIDE BAND (UWB) RECEIVER AS WELL AS DEVICE FOR THE IMPLEMENTATION OF THE METHOD - The invention relates to a method and a device for integrating signals transmitted from a transmitter (01-24-2013
20130022081ULTRA-WIDEBAND COMMUNICATION SYSTEM AND METHOD - The present invention provides systems and methods for communication between ultra-wideband (UWB) devices. In general, the UWB device may characterize the attenuation, and other characteristics of the communication environment. Using these characteristics the UWB device can adapt various communication parameters to improve the communication quality. The UWB device may use these characteristics to establish zones and sectors for communication with other UWB devices. Based on this zone and sector assignment the UWB device may select communication parameters for communication with other UWB devices. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.01-24-2013
20130022080INTEGRATED CIRCUIT FOR CONTROLLING A PROCESS - A radio transmission apparatus performs communications with high transmission efficiency. In this apparatus, a modulator modulates data and outputs to a first spreader. A second modulator modulates data under a modulation scheme having a higher M-ary number than the first modulator and outputs the modulated data to a second spreader. The first spreader spreads the data and outputs the spread data to a frequency domain mapping section. The second spreader spreads the data and outputs the spread data to a time domain mapping section. A frequency domain mapping section maps chips with spread data on subcarriers in the frequency domain and outputs the data with chips mapped on subcarriers to an IFFT section. The time domain mapping section maps chips with spread data on subcarriers in the time domain and outputs the data with chips mapped on subcarriers to the IFFT section.01-24-2013
20080232431Electronic key system and method - An in-vehicle LF transmitter transmits a synchronization signal to an in-vehicle RF receiver and transmits LF data (response request) including a synchronization signal to a portable device. The portable device performs RF data output and DSSS process and transmits RF data (response) subjected to spread process. The in-vehicle RF receiver receives the RF data and performs despread process. Both of the spread process of the portable device and the despread process of the in-vehicle RF receiver are performed by the use of a spread code the period of which is adjusted based on the synchronization signal transmitted from the in-vehicle LF transmitter.09-25-2008
20080232430Wireless transceiver and method for use therewith - A wireless transceiver includes a first integrated circuit and a second integrated circuit. The first integrated circuit includes a memory module that stores a plurality of operational instructions for implementing a plurality of protocol layers of a wireless protocol, a processing module that executes the plurality of operational instructions, and a first interface module. The second integrated circuit includes a second interface module that couples data to and from the first interface module, an RF transceiver that modulates a first baseband signal to produce a transmitted RF signal, and that demodulates a received RF signal to produce a second baseband signal, and a baseband module that generates the first baseband signal based on data received from the first interface module via the second interface module, and that generates data based on the second baseband signal to send to the first interface module via the second interface module.09-25-2008
20130142217SETTING A TRANSMISSION POWER LEVEL FOR A MOBILE UNIT - A spread signal is produced having an adjustable spread spectrum. A data signal is provided for transmission. The data signal is processed to have a first spread spectrum. The processed first spread spectrum data signal is filtered to have one out of a plurality of speed spectrums. The filtering capable of producing a signal having a spread spectrum of any of the plurality of spread spectrums. The filter one spread spectrum data signal is transmitted.06-06-2013
20110268157DATA ENCODING - The receiver portion of a UWB wireless device is altered by replacing analog-to-digital circuitry with a simple energy detection circuit. In embodiments, the coding methodology of a transmitter is altered to support the simplified receiver configuration. For example, instead of coding the data to be sent in the phase of the UWB signal, the data is encoded in a binary fashion in discrete frequency subbands of the UWB signal. Although this may reduce the usable bandwidth of the channel, it also decreases the complexity and power consumption of UWB devices. In one or more embodiments, a UWB device is able to select a transmission mode (BPSK or Energy Coding) based on its environment. Moreover, in one or more embodiments, receiving devices may switch between coding modes based on the capabilities of a remote transmitter and/or a peer receiver.11-03-2011
20110268156Method for Pulse-Based Ultra-Broadband Communication between at least One Transmitting Node and at Least One Receiving Node - An ultra-broadband signal having a plurality of pulses is transmitted from one or more transmitting nodes to one or more receiving nodes. In the ultra-broadband signal, data are transmitted by pulses having a first pulse rate in a first data transmission and by pulses having a second pulse rate in at least one second data transmission, with each second pulse rate higher than the first pulse rate. The pulses having the second pulse rate are transmitted in intervals, during which no pulses having the first pulse rate are transmitted. This has the advantage that by utilizing time gaps between pulses of the first data transmission, the data of a second data transmission can be transmitted at a higher pulse rate. The transmitting and receiving nodes need not be coordinated explicitly or coordinated from the outside.11-03-2011
20110222585HIGH-FREQUENCY COUPLER AND COMMUNICATION DEVICE - A high-frequency coupler includes a ground, a coupling electrode which faces the ground and is supported so as to be separated by a negligible height with respect to the wavelength of a high-frequency signal, and a resonating unit for increasing a current flowing into the coupling electrode via a transmission path, in which the coupling electrode has bent portions in places where charges with a first polarity are accumulated so that charges with a second polarity are gathered in a front face when the high-frequency signal is input to the coupling electrode and a standing wave occurs, and an infinitesimal dipole is formed, and the high-frequency signal is transmitted toward a high-frequency coupler of a communication partner side arranged to face each other so that the angle θ formed in the direction of the infinitesimal dipole is substantially 0 degrees.09-15-2011
20100014559SYSTEM AND METHOD FOR COMMUNICATING DATA USING CONSTANT ENVELOPE ORTHOGONAL WALSH MODULATION WITH CHANNELIZATION - A radio device includes a transmitter having a modulator for generating M-PAM communications symbols containing communications data. A Fast Walsh Transform circuit orthogonally encodes and band-spreads a communications symbol using the Fast Walsh Transform. A frequency modulation circuit frequency modulates the communications symbols wherein a constant envelope orthogonal Walsh modulated communications signal is generated having a plurality of orthogonal waveforms each forming a separate Walsh communications channel.01-21-2010
20100074301UNIFIED MIMO TRANSMISSION AND RECEPTION - A “unified” MIMO system that supports multiple operating modes for efficient data transmission is described. Each operating mode is associated with different spatial processing at a transmitting entity. For example, four operating modes may be defined for (1) full-CSI or partial-CSI transmission and (2) with or without steering transmit diversity (STD). An appropriate operating mode may be selected for use based on various factors (e.g., availability of a good channel estimate). With steering transmit diversity, data is spatially spread and transmitted on multiple spatial channels, and a single rate may then be used for all spatial channels used for data transmission. A receiving entity may utilize a minimum mean square error (MMSE) technique for all operating modes. The receiving entity may derive a spatial filter matrix and perform receiver spatial processing in the same manner for all operating modes, albeit with different effective channel response matrices.03-25-2010
20110292970Method and System for a Scalable Radio Architecture - Systems and methods for a scalable architecture for radio device and systems are disclosed. This architecture employs a scalable bandwidth to deliver higher data rates and transmission ranges to devices that need them, while still delivering lower power solutions for devices which utilize a smaller bandwidth. These systems and methods may divide the available frequency spectrum into a set of fundamental sub-bands. Different devices may use various multiples of these sub-bands depending on their needs. Devices employing this architecture are also capable of interoperation with one another regardless of the bandwidth they utilize. A device may scan through each sub-band within which the device intends to operate, searching for a common beacon transmitted by other devices utilizing the sub-band. If a beacon is found the device can choose to interoperate with the other device or, alternatively, continue scanning the sub-bands until an unused sub-band is found.12-01-2011
20110310929SYSTEM AND METHOD FOR MONITORING REMOTE DEVICES WITH A DUAL-MODE WIRELESS COMMUNICATION PROTOCOL - The present invention is generally directed to systems and device for monitoring remote device with a wireless, dual-mode communication protocol. As such, a representative embodiment is a system for monitoring and controlling remote devices. The system includes a first and a second remote device; and a first and a second wireless transceiver integrated with the respective remote devices. The wireless transceivers are configured to communicate with at least one of a spread-spectrum communication protocol and a fixed-frequency communication protocol.12-22-2011
20120002702SYSTEMS AND METHODS FOR INDOOR POSITIONING - A positioning system comprises a plurality of controllers, each controller comprising a wideband receiver and a narrow band transmitter, the each controller configured to receive a wideband positioning frame using the wideband receiver from one or more devices and to transmit acknowledgement frames using the narrow band transmitter that include timing and control data for use by the devices to establish timing for transmission of the positioning frame; and at least one device comprising a wideband transmitter and a narrow band receiver, the device configured to transmit a positioning frame to the plurality of controllers using the wideband transmitter and to receive an acknowledgement frame from one or more controllers using the narrow band receiver, extract timing and control information from the frame, and adjust the timing and synchronization of the wideband transmitter using the timing and control information.01-05-2012
20120002701Method and System for Transmission of Identification via Metadata for Repeating Relays using Spread-Spectrum Technology - A communication method for transmitting meta-data through a meta-carrier signal comprising encoding meta-data using an encoder, the meta-data comprising information that identifies a repeating relay to which a spread meta-carrier signal is to be transmitted, encoded using an encoder, modulating, using a modulator and spreading, using a spreader, the encoded meta-data such that the spread meta-carrier signal results, and transmitting, by a transmitting device, the spread meta-carrier signal to the repeating relay wherein the repeating relay does not process or modify the spread meta-carrier signal, the spread meta-carrier signal being transmitted over at least a portion of a bandwidth of the repeating relay.01-05-2012
20130195145LOW POWER ULTRA WIDEBAND TRANSCEIVERS - Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.08-01-2013
20130195146INTEGRATED CIRCUIT FOR CONTROLLING RADIO COMMUNICATION PROCESS - Provided is a radio communication device which can make Acknowledgement (ACK) reception quality and Negative Acknowledgement (NACK) reception quality to be equal to each other. The device includes: a scrambling unit (08-01-2013
20120087393REFERENCE SYMBOL STRUCTURE FOR DFT SPREAD OFDM SYSTEM - Provided is a data transmission apparatus to transmit a reference orthogonal frequency division multiplexing (OFDM) symbol generated by frequency division multiplexing a reference symbol and a data symbol, and a data reception apparatus to estimate a channel using the reference OFDM symbol. Since the reference symbol and the data symbol are frequency division multiplexed, a Peak to Average Power Ratio (PAPR) may not increase greatly, and the transmission apparatus may transmit the reference OFDM symbol to the data reception apparatus more frequently. Accordingly, the data reception apparatus may estimate a channel accurately.04-12-2012
20120087392TRANSMISSION APPARATUS - The degree of multiplexing of a code division multiplexed signal transmitted by subcarriers is selected on a subcarrier-by-subcarrier basis. As a result, inter-code interference on the propagation path and degradation on the propagation path are lower for a code division multiplexed signal allocated to subcarriers with a low degree of signal multiplexing (G04-12-2012
20120093196ALL DIGITAL IMPLEMENTATION OF CLOCK SPECTRUM SPREADING (DITHER) FOR LOW POWER/DIE AREA - A digital circuit configured to spread a clock train spectrum includes a clock configured to generate the clock train, and a variable divider configured to divide the frequency of the clock train by a temporally-varying-divider value to modulate the clock train and generate a dithered clock train. The circuit further includes a first accumulator configured to accumulate the dithered clock train to generate a frequency modulation waveform, and a second accumulator configured accumulate the frequency modulated waveform to generate a phase modulation signal. The circuit further includes a phase-value calculator configured to calculate the temporally-varying divider value based on the phase modulation signal; and a closed-loop control circuit configured to track and filter the modulation of the dithered clock train to generate a second clock train that is the spread spectrum of the first mentioned clock train.04-19-2012
20120093195ULTRA-WIDEBAND TRANSMITTER UNIT - The invention relates to an ultra-wideband transmitter unit for a hand-held machine tool, particularly for a sensor device. Said ultra-wideband transmitter unit is provided for transmitting a transmission signal having a line spectrum. According to the invention, the ultra-wideband transmitter unit comprises an adjusting unit (04-19-2012

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