Class / Patent application number | Description | Number of patent applications / Date published |
375228000 | With indicator | 66 |
20080212664 | APPARATUS AND METHODS FOR DISPLAYING SIGNAL CHARACTERISTICS - A receiver | 09-04-2008 |
20080212665 | System for monitoring the quality of a communications channel with mirror receivers - A system is presented that monitors the quality of a communications channel with mirror receivers. A first receiver and a second receiver, coupled in parallel with the first receiver, receive a data signal transmitted over the communications channel. The second receiver generates an output signal. A signal integrity (SI) processor manipulates the output signal in order to determine the quality of the communications channel. The SI processor samples a phase-shifted version of the output signal, which has a phase shifted relative to a zero reference phase, and analyzes the phase-shifted version of the output signal for bit errors. In an embodiment, the SI processor manipulates the output signal to extract an eye diagram indicative of the quality of the communications channel. The SI processor non-intrusively determines the quality of the communications channel using the second receiver. | 09-04-2008 |
20080253437 | MONITORING RELIABILITY OF A DIGITAL SYSTEM - Method, system and article of manufacture are provided for continually monitoring reliability, or aging, of a digital system and for issuing a warning signal if digital system operation degrades to or past a specified threshold. The technique includes periodically determining a maximum frequency of operation of the digital system, and generating a warning signal indicative of a reliability degradation of the digital system if at least one of: (i) a measured or estimated maximum frequency of operation of the digital system is below a warning threshold frequency of operation of the digital system, wherein the warning threshold frequency is greater than or equal to a manufacturer specified minimum frequency of operation for the digital system; or (ii) a rate of change in the difference between measured maximum frequencies of operation of the digital system exceeds an acceptable rate of change threshold for the digital system. | 10-16-2008 |
20080267275 | CORDLESS PHONE DETECTION IN 2.4 GHZ FOR INTERFERENCE MITIGATION - A system and method for determining whether sampled spectrum data comes from a cordless phone is disclosed. The system includes a device to detect the sampled spectrum data and an algorithm to analyze the sampled spectrum data. The algorithm separates the narrowband components from the wideband components of the sampled spectrum data, then classifies the sampled spectrum data based on the bandwidth, frame length, and inter-frame time, as either being an analog or digital FM phone, a DSSS phone, a WDCT phone, or a non-cordless phone, such as a Bluetooth device. The algorithm may be used for interference mitigation. | 10-30-2008 |
20090028232 | Errors Visibility Enhancement Methods For Video Testing - A system and method of evaluating a decoder under test can include the steps of storing a first segment of a video sequence for creating a first test frame portion including a first image, storing a second segment of video sequence for creating a second test frame portion including a second image, combining the first and second test frame portions into a visualization segment, streaming the visualization segment to the decoder, displaying the resultant output stream from the decoder under test, and determining if a defect exists in the displayed decoded output stream. Determining if a defect exists can include: if the display of the displayed visualization segment shows a steady picture, then determining there is a defect in the decoded picture, and if the display of the visualization segment shows flickering or flashing detail, then determining that there is a defect in the decoded picture. | 01-29-2009 |
20090034599 | Method and apparatus for indicating the performance of a digital signal, based on a mapping of symbols extracted from the digital signal to one or more target symbol states - In one embodiment, a digital signal having a modulation format is demodulated, in real time, to extract symbols from the digital signal. The extracted symbols are then mapped to one or more target symbol states of the modulation format, in real time; and the performance of the digital signal is indicated based on the mapping of extracted symbols to the one or more target symbol states. Other embodiments are also disclosed. | 02-05-2009 |
20090046771 | RECEPTION QUALITY ESTIMATING APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND RECEPTION QUALITY ESTIMATING METHOD - A reception quality estimating apparatus, a wireless communication system and a reception quality estimating method wherein the communication qualities in a case where different communication schemes are used to have communication can be artificially estimated without switching the communication schemes to be used for the communication. A wireless communication apparatus ( | 02-19-2009 |
20090086804 | Automatic Gain Control Stress Measurement For Digital Carriers - The testing equipment of the present invention calculates a single “AGC stress” value, which provides an indication of the stability of the level of a digital carrier based on the change in gain required to stabilize the power of an incoming cable signal over time. Ideally the AGC stress value is rated on a scale, e.g. 1 to 10 or 0 to 5, and is fed into the DQI measurement system as a new data model. | 04-02-2009 |
20090097537 | Simplified algorithm for abnormal situation prevention in load following applications including plugged line diagnostics in a dynamic process - Systems and methods are provided for detecting abnormal conditions and preventing abnormal situations from occurring in controlled processes. Statistical signatures of a monitored variable are modeled as a function of the statistical signatures of a load variable. The statistical signatures of the monitored variable may be modeled according to an extensible regression model or a simplified load following algorithm. The systems and methods may be advantageously applied to detect plugged impulse lines in a differential pressure flow measuring device. | 04-16-2009 |
20090122852 | EYE VIOLATION AND EXCESS JITTER TRIGGER - An eye violation and excess jitter trigger for a digital signal uses a mask within a unit interval of the digital signal, such as a rectangular mask having corners defined by a high threshold, a low threshold, an early clock and a late clock, the early and late clocks being derived from a reference clock. The reference clock may be a recovered clock derived from the digital signal or from high and low threshold comparator outputs, or may be an external clock. For the excess jitter trigger, which is a special case of the eye violation trigger, the high and low thresholds are essentially equal. A status of the digital signal with respect to the mask is determined using the high and low thresholds and the early and late clocks, and a violation signal is output when the status indicates that a portion of the digital signal crossed into the mask. The violation signal may then be used to trigger data acquisition or for other purposes. | 05-14-2009 |
20090129455 | APPARATUS FOR AND METHOD OF AUTOMATICALLY CONTROLLING SKEW BETWEEN TRANSMITTED DATA - Provided is an apparatus for and method of automatically controlling skew between transmitted data, which is caused when a common low-speed field-programmable gate array (FPGA) transmits signals having a transmission rate in the range of tens of Gbps to an optical transponder. The apparatus and method can transmit data with a transmission rate of several Gbps irrespective of the type of the FPGA. | 05-21-2009 |
20090154541 | TRANSMITTER, RECEIVER AND COMMUNICATION TERMINAL SYSTEM - The transmitter for conducting communication with a receiver using a pulse train includes: a transmission frame generation section for generating a transmission frame; a pulse transmission timing generation section for generating pulse transmission timing to have intervals initially set to be the same as intervals at which the receiver receives pulses; and a pulse generation section for generating pulses according to the transmission frame and the pulse transmission timing. | 06-18-2009 |
20090185608 | METHODS AND SYSTEMS FOR SURVEYING, ANALYZING AND PRESENTING POINT TO POINT MIMO CHANNELS USING INFORMATION EXCHANGED BETWEEN IEEE 802.11N COMPLIANT NODES AT THE MEDIA ACCESS CONTROL LAYER - Methods and apparatuses for monitoring MIMO channel transactions to determine MIMO channel characteristics. | 07-23-2009 |
20090190644 | METHOD AND APPARATUS FOR QUICKLY DIAGNOSING INTER-COMMUNICATION PROBLEM OF DIGITAL SUBSCRIBER LINE TRANSCEIVERS - A method for quickly diagnosing inter-communication problem of digital subscriber line transceivers, which records the interactive messages between central office xDSL terminal unit (xTU-C) and remote xDSL terminal unit (xTU-R), amends specific message of said interactive messages, executes interactive test utilizing amended message, and analyzes the result of said test to confirm the reason of inter-communication problem. The embodiments also provide an apparatus for quickly diagnosing inter-communication problem of digital subscriber line transceivers. The embodiments efficiently resolve the inter-communication problem between xTU-C and xTU-R which are different xDSL transceivers, provide convenience to telecommunication service provider and telecommunication device maintenance personnel, and save the cost. Device maintenance personnel can quickly, efficiently and accurately resolve inter-communication problem of xDSL devices, so as to simplify processing flow, reduce workload and difficulty, save substantive cost, and improve efficiency. | 07-30-2009 |
20090238256 | CQI FEEDBACK STRUCTURE - Embodiments of the present disclosure provide a reporting allocation unit, an indicator interpretation unit and methods of operating a reporting allocation unit and an indicator interpretation unit. In one embodiment, the reporting allocation unit includes an indicator configuration module configured to provide reporting interval and offset values of corresponding rank and channel quality indicators for user equipment. The reporting allocation unit also includes a sending module configured to transmit the reporting interval and offset values to the user equipment. | 09-24-2009 |
20090274204 | METHOD AND APPARATUS FOR PROVIDING CHANNEL QUALITY FEEDBACK IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM - In an OFDM communication system, a mobile station provides a radio access network (RAN) a channel quality metric second order statistic, in one embodiment a signal to noise plus interference power ratio (SINR) second order statistic and in particular an SINR standard deviation and/or variance, along with a mean channel quality metric, that is, a mean SINR. By providing both a mean channel quality metric and a channel quality metric second order statistic, the communication system permits the RAN to create a more accurate fading profile of an associated air interface, and in particular a downlink of the air interface, thereby facilitating an improved scheduling decision over the prior art and assuring that a packet has a higher probability to go through a downlink channel without too many retransmissions. | 11-05-2009 |
20090296797 | Data Description Method and Related Packet and Testing System for a Serial Transmission Interface - A data description method for a serial transmission interface includes generating a low-speed data and a high-speed data simultaneously, sampling the low-speed data to generate a first sampling result according to a first sampling rate within a specified duration, sampling the high-speed data to generate a second sampling result according to a second sampling rate within the specified duration, and combining the first sampling result and the second sampling result to describe contents of the low-speed data and the high-speed data within the specified duration. | 12-03-2009 |
20090304061 | BLIND CHANNEL QUALITY ESTIMATOR - An embodiment is a method and apparatus to estimate channel quality. An absolute processor computes absolute real and imaginary values of real and imaginary parts, respectively, of output of a demodulator. A phase count unit generates first and second phase counts representing deviations from zero phase noise using the absolute real and imaginary values. An amplitude count unit generates first and second amplitude counts representing attenuation of a received signal using the absolute real and imaginary values. An integrator integrates the first and second phase counts and first and second amplitude counts into a signal quality indicator that represents a measure of quality of channel with respect to noise and fading. | 12-10-2009 |
20090310664 | Surface rf emitter passive ranging accuracy confirmation algorithm - Kalman gain is used to calculate range accuracy for a passive angle-of-arrival determining systems, most notably for short-baseline interferometry, in which Kalman gain after arriving at a minimum proceeds to within a predetermined fraction or percent of zero gain, at which time the range estimate accuracy is known. | 12-17-2009 |
20100014572 | TEST DEVICE AND METHOD OF DETECTING AN IMBALANCE IN A POWER LEVEL OF A CHANNEL - The present invention provides a test device and a method enabling automatic detection of an imbalance in a power level of a channel. The test device includes a tuner, a power-level measurement system, and an evaluation unit. According to the method, a test channel is selected from a plurality of channels, by means of the tuner. A power level of the test channel and a total power level of the plurality of channels are measured, by means of the power-level measurement system. A ratio of the total power level of the plurality of channels to the power level of the test channel is then evaluated, by means of the evaluation unit, to detect an imbalance in a power level of the test channel. | 01-21-2010 |
20100067570 | Method and Device for Detecting Simultaneous Double Transmission of AM Signals - A device that detects the presence of several amplitude-modulated high-frequency signals in a sum signal with closely-adjacent carrier frequencies. The sum signal is phase-demodulated by a phase demodulator and Fourier-transformed by a Fourier-transformation device. On the basis of the Fourier transform, the presence of several carrier frequencies is determined by an evaluation device. | 03-18-2010 |
20100074316 | METHOD OF TRANSMITTING FEEDBACK INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting feedback information in a wireless communication system includes transmitting a channel quality indicator (CQI) for a first frequency band and transmitting a precoding matrix indicator (PMI) and a rank for a second frequency band that is wider than the first frequency band. Overhead incurred by transmission of feedback information such as CQI, PMI and a rank may be reduced. | 03-25-2010 |
20100111155 | Serial Decode Correlation And Navigation - An instrument screen display includes a unique marker that provides the correlation and navigation through the analog data. The marker tells the user which packet or symbol is being displayed in the analog trace. The selected line in the listing (listing row that is blue) and the blue line on the trace above indicate which packet is selected for the purpose of showing details and packet data in the other tabs in the listing window. In addition to correlation, navigation can occur from either display. This type of marker is an innovative approach to correlating and navigating the disparate data types displayed on a modern oscilloscope. | 05-06-2010 |
20100128770 | Measuring Delay in a Network Segment and/or through a Network Communications Device - Measuring delay in a network segment and/or through a network device is disclosed. A method includes a sender preparing a real-time transport protocol with a transmit timestamp based on the time received from a remote, well-known time server, and a receiver computing a one way delay based on a receive time obtained from a remote, well-known time server and the transmit timestamp. A method in a single system includes a sender preparing a real-time transport protocol with a transmit timestamp based on the system, and a receiver computing a one way delay based on a receive time obtained from the system and the transmit timestamp. The method may be performed on one or more network cards and in one or more network testing systems, and may be implemented by one or more computing devices. | 05-27-2010 |
20100150219 | SAMPLING DEVICE AND METHOD IN WIRELESS COMMUNICATION SYSTEM - The exemplary embodiment of present invention provides a sampling device and method in a wireless communication system that is capable of precisely measuring a distance by combining data blocks passing through at least two delay paths and performing sampling thereon. | 06-17-2010 |
20100195708 | SYSTEMS AND METHODS FOR CHARACTERIZING TRANSMISSION LINES USING BROADBAND SIGNALS IN A MULTI-CARRIER DSL ENVIRONMENT - Using DSL modems as data collectors, the modems processes the data to, for example, allow easier interpretation of the line characteristics. In particular, the modems postprocess the data including calibration, filter compensation, determination of the SNR medley from the bits and gains tables and rate conversion. The interpretation process uses the postprocessed data and determines loop characterization, interferer detection, a data reduction estimation and a data rate estimation. The outputs of these determinations least allow for the characterization of the line conditions between the two modems. | 08-05-2010 |
20100208786 | TRANSMISSION APPARATUS AND LINE QUALITY EVALUATING METHOD - A transmission apparatus includes a test signal control unit that copies a test signal of a pseudo-random bit sequence and controls insertion of the same test signal in each member of a plurality of members of a concatenation signal, a concatenation signal transmitting unit that transmits each member of the concatenation signal with the test signal inserted therein by the test signal control unit to other apparatus via a plurality of transmission paths, a concatenation signal receiving unit that receives from the other apparatus each member of a plurality of members of a concatenation signal, and an individual-line-quality calculating unit that, using a test signal inserted in the members of the concatenation signal received by the concatenation signal receiving unit, individually evaluates each member of the concatenation signal received by the concatenation signal receiving unit and calculates a line quality of each transmission path. | 08-19-2010 |
20100238990 | Methods for indentifying errant channel reporting devices - To address the need for new techniques that enable the identification of errant channel reporting devices, various embodiments are described. In some embodiments, a network node receives ( | 09-23-2010 |
20100266005 | RAILWAY POSITIONING SYSTEM - A railway positioning system provides an on-board speed measurement device ( | 10-21-2010 |
20100316106 | APPARATUS AND METHOD FOR DETERMINING AND REPRESENTING A SYNCHRONIZATION STATUS - A device and method for determining and displaying on a display element the status of at least one synchronization implemented in an electronic measuring instrument or a telecommunications device is provided. The device includes several functional units provided within the electronic measuring instrument or the telecommunications device, and each functional unit determines at least one parameter, the value of which corresponds to the status of the synchronization implemented in the respective functional unit. | 12-16-2010 |
20110002373 | APPARATUS FOR PERFORMING BEAM TRACKING PROCESS AND METHOD THEREOF - A method for performing beam tracking in a wireless communication network is provided. In the method, a transmitter station emits beam patterns including respective beam pattern indices to receiver stations and receives a feedback index indicating one of the beam patterns from each receiver station during a predetermined channel time after the emission of beam patterns is completed. A beam pattern feedback is processed using a simple code, thereby minimizing the amount of information and hardware required for beam search and tracking. In addition, in uni-directional beam tracking, it is possible to perform tracking on a number of beam links at once and a sub-channel that can be used for beam tracking and search is allocated to each station to allow a number of stations to simultaneously perform beam search, thereby reducing the amount of used channel time. | 01-06-2011 |
20110051793 | SYSTEM AND METHOD FOR EVALUATING PERFORMANCE OF A MIMO ANTENNA SYSTEM - A performance evaluation system for a multiple-input multiple-output (MIMO) antenna system receives simulation parameters from an input device, and simulates a MIMO antenna system accordingly. A method, also provided, further evaluates performance of the simulated MIMO antenna system when a series of radio frequency (RF) signals are transmitted through the MIMO antenna system, and displays a performance analysis result of the MIMO antenna system on a display device for evaluation of the performance of the simulated MIMO antenna system. | 03-03-2011 |
20110103452 | DIGITAL CUMULATIVE SPECTRUM ANALYSIS APPARATUS AND METHOD FOR DIRECTION FINDING AND LOCATION - A digital spectrum analysis apparatus and method for direction finding (DF) and location is provided. The digital spectrum analysis apparatus for single-channel direction finding includes: a digital processing unit configured to receive a signal, convert the received signal into a digital signal, reduce a sampling rate of the digital signal by using a digital down converter (DDC), and convert the digital signal into a baseband complex signal; a spectrum processing unit configured to map a bearing and a power level of the baseband complex signal into coordinate system, and allocate different colors to the power levels depending on the accumulation ratio of the power levels; and a display unit configured to display the power levels with colors in order to estimate the bearing of the signal. | 05-05-2011 |
20110122938 | COMMUNICATION DEVICE AND METHOD - A communication device including: mapping frequency domain signals including phase information onto, of a band of subcarriers for transmitting the frequency domain signals, a band in which a twiddle factor for shifting the band of the subcarriers to a specified band is an integer power of an imaginary unit; performing inverse fast fourier transform on the subcarriers on which the frequency domain signals are mapped, to transform the subcarriers into time domain signals; increasing the number of samples by up-sampling the time domain signals; and executing, when the twiddle factor is an integer power of the imaginary unit, interchange processing for interchanging a real number component and an imaginary number component of each of the samples up-sampled or sign-reversal processing for reversing a sign of the real number component or the imaginary number component to shift the band of the frequency-domain-mapped subcarriers to the specified band. | 05-26-2011 |
20110150068 | Filter for Identifying Signal Artifacts in Bandwidth-limited Instruments - An apparatus and method for determining if ringing in an output signal from a receiver that processes an input signal is the result of a bandwidth limitation in the receiver that processes an input signal rather than ringing in the input signal is disclosed. The apparatus includes the receiver and a ring suppression filter. The ring suppression filter receives the receiver output signal and generates a ring suppressed output signal therefrom. The receiver and the ring suppression filter provide a first aggregate system response such that the ring suppressed output signal does not include ringing introduced by the receiver. The first aggregate system response is linear in phase. | 06-23-2011 |
20110158306 | SIGNAL ANALYZER AND METHODS FOR DISPLAYING CONSTELLATIONS - Constellation display allows a user to evaluate the quality of a signal under test with the constellation display even if the signal is a digital modulation signal that has many possible ideal phases. A signal analyzer | 06-30-2011 |
20110188562 | Characteristic Response Extraction for Non-Linear Transmit Channels - Techniques for extracting the characteristic response of a non-linear channel are presented. In various implementations of the invention, a channel's characteristic response may be determined by identifying a first input sequence, determining the ones compliment of the first input sequence and then determining the response of the channel to these two input sequences. Subsequently, two input matrices and two response matrices may be generated based upon the two input sequences and their corresponding responses. Given these four matrices, a symmetrical response component may be determined by iteratively solving a system of equations formed from the columns of each matrix. Subsequently, given the symmetric component and these four matrices, an asymmetrical response component may be determined by again iteratively solving the system of equations for the columns of each matrix. | 08-04-2011 |
20110243211 | Method, apparatus, and system for enabling a deterministic interface - To address the need for efficient and reliable testing of integrated devices, system on chips, and computers, deterministic behavior for an interface is accomplished by fixing variation in latency associated with receiver and transmitter data stream. The interface may be a serial interface that is PCIe compliant and corrects latency variations in the receiver that consequently results in deterministic transmit data. Consequently, the data received and/or transmitted is predictable with respect to time and facilitates testing and validation of the devices and logic associated with the interface. | 10-06-2011 |
20110268170 | DATA SIGNAL QUALITY EVALUATION APPARATUS - When an operating unit is operated to designate an arbitrary width W and an arbitrary angle θ, a mask region limiting unit limits the effective range of a reference mask set for compliance measurement of the data signal to be evaluated by a reference mask setting unit to the range determined by the designated width and angle and displays the limited effective range on a display unit. | 11-03-2011 |
20120044982 | CQI AND RANK PREDICTION FOR LIST SPHERE DECODING AND ML MIMO RECEIVERS - Systems and methodologies are described that facilitate integrating a list-sphere decoding design in a multiple input-multiple output (MIMO wireless communication environment. According to various aspects, optimal rank selection and CQI computation for an optimal rank can be performed in conjunction with a non-linear receiver, such as a maximum life (ML) MMSE receiver, a non-linear receiver with a list-sphere decoder, and the like. Optimal rank selection can be performed using a maximum rank selection protocol, a channel capacity-based protocol, or any other suitable protocol that facilitates rank selection, and CQI information can be generated based in part on effective SNRs determined with regard to a selected optimal rank. | 02-23-2012 |
20120163442 | System and method for audio video pattern sequence diagnostic tool - There is provided a system and method for confirming correct encoder processing for a media file. There is provided a method comprising preparing a diagnostic clip, embedding the diagnostic clip in the media file to create a modified media file, encoding the modified media file according to a set of encoder settings to create an encoded media file embedded with an encoded diagnostic clip, displaying the encoded diagnostic clip to a user, and assessing the accuracy of the encoder settings based on a feedback received from the user. In this manner, users may quickly and accurately diagnose encoder settings after encoding the media file. Users may more easily identify which encodes caused which problems and avoid the costly overhead of backtracking in the production process. | 06-28-2012 |
20120243595 | METHOD AND SYSTEM FOR PROVIDING PHASE REFERENCE SIGNAL - A method and system of providing a phase reference signal includes generating a reference signal having a reference frequency, modulating the reference signal at a modulation frequency lower than the reference frequency to obtain a modulated drive signal, receiving the modulated drive signal at a phase reference, and generating the phase reference signal based on the modulated drive signal. The phase reference signal including multiple reference tones having corresponding tone frequencies clustered around multiples of the reference frequency. A spacing between adjacent tones of the multiple reference tones is the same as the modulation frequency or an integer multiple of the modulation frequency. | 09-27-2012 |
20120250752 | Grid Event Detection - Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for detecting grid events. In one aspect, a method includes receiving signal characteristic data that specify signal characteristic values for signals that are received over each of a plurality of communications channels of a power line communications network. A determination is made that the signal characteristic values for the signals that are received over at least one of the communications channels are outside of a baseline signal value range. An endpoint that communicates over the at least one communications channel is identified, and a determination is made that a set of the signal characteristic values for the identified endpoint matches one of a plurality a grid event signatures for the identified endpoint. Data that identify the endpoint and a particular grid event that is represented by the matched grid event signature are provided. | 10-04-2012 |
20120269252 | Minimal Reconfiguration Spectrum Stitching with Overlapped Bands - Embodiments of this invention include a test and measurement instrument and associated methods for acquiring and stitching wide overlapped non-uniform frequency bands so that a user specified band can be efficiently displayed and analyzed. The test and measurement instrument includes a user interface to receive the user specified frequency span. Acquisition circuitry acquires one or more predefined frequency bands having non-uniform overlapping frequency ranges. A frequency band processing section can decimate the acquired frequency bands, mask the acquired frequency bands, and stitch the masked frequency bands together. A display section displays the user specified frequency span using the stitched frequency bands. Due to the overlap configuration of the wide non-uniform bands, any user specified span between 50 kHz and 6 GHz, or thereabout, can be covered by two bands. | 10-25-2012 |
20120314749 | Non-Intrusive Device for Diagnosis, by Vectorial Comparison, of Operating Situation(s) in at Least One Communication Network - A device (D) is dedicated to the diagnosis of operating situations) in at least one communication network (RC) having a bus (BU) with N wire(s). This device (D) comprises i) P connection means (MC1-MC3), with P≧N, bypass-connected at least to the N wires of the bus (BU) so as to access the P voltages présent, ii) conversion means (MV1-MV3) devised so as to convert the P voltages into P first digital signais (SI (p,t)), iii) processing means (MT) devised so as to construct a measurement vector (V(t)) associated with a voltages measurement instant (t) and comprising K éléments chosen from among at least the P first digital signais (SI (p, t)), then to compare at least this measurement vector (V(t)) with at least I pairs, with I≧ | 12-13-2012 |
20130003815 | METHOD AND A DEVICE FOR PREVENTING SIGNAL-EDGE LOSSES - A method for marking a signal edge, which has been removed from at least one decimated binary signal after the decimation of an associated binary signal, within the decimated binary signal, establishes successive signal portions of the respective binary signal, in each case with a number of sampled values corresponding to a decimation factor of the decimation. It detects a signal edge removed through decimation from each signal portion if the number of signal edges determined in each signal portion of the respective binary signal is greater than one. Then, the sampled values of the respective decimated binary signal are determined through decimation of the sampled values of the associated binary signal with the decimation factor, and the removed signal edge at the sampling time of the decimated binary signal which corresponds to the signal portion of the associated binary signal with the signal edge removed through decimation is marked. | 01-03-2013 |
20130034141 | MONITORING QAM IMPAIRMENTS IN DIGITAL COMMUNICATIONS - A diagnostic data acquisition system for analyzing impairments in a QAM digital communication system is triggered by diagnostic data generated by a QAM demodulator when demodulating a QAM signal. Upon triggering, the data acquisition system can capture the diagnostic data used for triggering, and/or some other diagnostic data. The captured data may be stored for subsequent analysis to determine a probable cause of the impairment. | 02-07-2013 |
20130128941 | SYSTEMS AND METHODS FOR MEASURING A SIGNAL QUALITY BETWEEN AN ENTERTAINMENT DEVICE AND A REMOTE CONTROL - Methods and systems are provided for measuring a signal quality between an entertainment device and a remote control. The entertainment device, for example, may include, but is not limited to, a signal receiver, a memory configured to store a predetermined data sequence, and a controller coupled to the signal receiver and the memory. The controller may be configured to receive a data sequence from the signal receiver, compare the received data sequence to the predetermined data sequence, and generate signal quality data on the received data sequence based upon the comparison. | 05-23-2013 |
20130156084 | RECTIFIER, RECEIVED SIGNAL STRENGTH INDICATOR, AND RECEIVER - A received signal strength indicator is provided. The received signal strength indicator includes a plurality of differential amplifiers forming an amplifier chain for amplifying differential signals and a plurality of rectifiers for rectifying signals output from the plurality of differential amplifiers and the differential signals, and a low pass filter for combining the signals rectified by the plurality of rectifiers to output received signal strength. Each rectifier includes a class AB voltage-current converter for converting a differential voltage into a current, and two triode transistors. | 06-20-2013 |
20130182753 | METHOD AND APPARATUS FOR LOCATING FAULTS IN COMMUNICATIONS NETWORKS - The present invention relates to a device for the location of passive intermodulation faults in a coaxial cable network. The test apparatus ( | 07-18-2013 |
20130230088 | ANTENNA POINTING FOR MULTIPLE-INPUT-MULTIPLE-OUT (MIMO) DEVICES - Performance in multiple-input-multiple-output (MIMO) antenna systems may be enhanced by configuring beams in a direction that reduces coupling between the beams. A decoupling metric may be calculated based on signal strengths received through the beams when an antenna system is pointed in different directions. The decoupling metric may be used to select a particular direction for operation of the antenna system. The decoupling metric may be combined with the signal strengths from each beam to select a direction for the antenna. An interface provides information to a user during positioning of the antenna to allow the user to select a direction for placement of the antenna that reduces coupling between beams in the MIMO antenna system. | 09-05-2013 |
20130259110 | SYSTEM FOR SPECTRUM SENSING OF MULTI-CARRIER SIGNALS WITH EQUIDISTANT SUB-CARRIERS - A multi-carrier signal is typically comprised of many equidistant sub-carriers. This results in periodicity of spectrum within the bandwidth of such a multi-carrier signal. An unknown multi-carrier signal with equidistant sub-carriers can thus be sensed together with its sub-carrier spacing by finding a discernible local maximum in the cepstrum (Fourier transform of the log spectrum) of the multi-carrier signal. | 10-03-2013 |
20140064349 | DIGITAL CUMULATIVE SPECTRUM ANALYSIS APPARATUS AND METHOD FOR DIRECTION FINDING AND LOCATION - A digital spectrum analysis apparatus and method for direction finding (DF) and location is provided. The digital spectrum analysis apparatus includes: a multi-channel unit configured to convert signals inputted from antennas into digital signals, reduce a sampling rate of the digital signals by using a digital down converter (DDC), and convert the digital signals into baseband complex signals, and having a plurality of channels; a DF estimator configured to estimate the direction of the signal; a spectrum processing unit configured to map any one of a bearing and a power level of the baseband complex signal into coordinate system, and allocate different colors to one of the bearings and the power levels depending on the accumulation ratio of one of the bearing and the power level; and a display unit configured to display the power level and the bearing with colors. | 03-06-2014 |
20140219326 | METHOD AND DEVICE FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and a device for reporting channel state information. According to one embodiment of the present invention, a method for allowing a terminal to report channel state information (CSI) in a wireless communication system comprises the steps of: reporting a rank indicator (RI); dropping a report of a precoding matrix indicator (PMI) after the RI has been reported; and reporting a channel quality indicator (CQI) after the PMI report has been dropped. Here, a rank value corresponding to the RI may be a changed rank value compared to a rank value corresponding to the most recently reported RI before the RI report. Furthermore, the CQI can be determined on the basis of another precoding matrix, rather than a precoding matrix corresponding to the dropped PMI. | 08-07-2014 |
20140269877 | Systems, methods, and devices for electronic spectrum management - Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified. | 09-18-2014 |
20140314135 | VECTOR SIGNAL ANALYZER - Disclosed in the present invention is a vector signal analyzer, which relates to communication technology. The vector signal analyzer comprises: a radio frequency front end splitting module, for splitting the received signals to at least, two signals; an analog signal processing module, for performing radio frequency/micro wave processing and analog-digital conversion for each signal separately; a digital signal processing module, fir performing spectrum analyze and signal demodulation analyze separately for each digital signals, which are outputted from the analog signal processing module. With the present invention, the received signals are divided into at least two signals by the radio frequency front end splitting module, and radio frequency/micro wave processing and analog-digital conversion are performed for each signal separately, then spectrum analyze and signal demodulation analyze are performed by digital signal processing module separately for each signal, thereby spectrum measurement function and signal demodulation analyze function are realized simultaneity, and the synchronization of each of analyze results gets better, so that it is convenient to compare and analyze by operators. | 10-23-2014 |
20140321522 | Systems, methods, and devices for electronic spectrum management - Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified. | 10-30-2014 |
20140369395 | Error Detection Based on Superheterodyne Conversion and Direct Downconversion - In one embodiment, a radio receiver has a first downconverter, a second downconverter, first and second analog-to-digital converters, and an error detector. The first downconverter downconverts a received RF signal into a first baseband-frequency signal using a first downconversion technique, and the second downconverter downconverts the received signal into a second baseband-frequency signal using a second downconversion technique, different from the first downconversion technique. The first and second analog-to-digital converters convert the first and second baseband-frequency signals into first and second baseband digital signals, respectively. The error detection logic detects errors in at least one of the first and second baseband digital signals based on a comparison of the first baseband digital signal to the second baseband digital signal. | 12-18-2014 |
20140369396 | WIRED COMMUNICATION APPARATUS AND WIRED COMMUNICATION METHOD - Provided is a wired communication apparatus which communicates using a cable. The wired communication apparatus includes: a signal output unit and a bi-directional low-speed communication unit which transmit data to the cable; and a cable characteristic determining unit which measures the capacitance of the cable, and determines whether the cable is normal or abnormal according to the measured capacitance. | 12-18-2014 |
20150049796 | METHOD AND APPARATUS FOR GRAPHIC DISPLAY OF I/Q VALUES OF A BASEBAND SIGNAL - An approach for the graphic display of I/Q values of a baseband signal by means of a constellation diagram is provided. The approach comprises: selecting a subset of I/Q values from a set of I/Q values of a baseband signal, wherein the non-selected I/Q values of the set form a non-selected subset; calculating a frequency of occurrence of each I/Q value of the selected subset; assigning display information to each I/Q value of the selected subset, wherein the display information at least corresponds to the respective frequency of occurrence; and displaying, on a display device, the set of I/Q values of the baseband signal in a constellation diagram, based at least in part on the display information, wherein the I/Q values of the non-selected subset is displayed in a different manner from the I/Q values of the selected subset. | 02-19-2015 |
20150117506 | SELF-CHARACTERIZING, SELF CALIBRATING AND SELF-MEASURING IMPEDANCE TUNERS - An impedance tuner system, usable in a measurement system including at least one measurement system device, the tuner system comprising the impedance tuner having a signal transmission line, and an impedance-varying system coupled to the transmission line, and responsive to command signals to selectively vary the impedance presented by the impedance tuner. An impedance tuner controller is configured to generate the command signals, and wherein measurement device drivers and at least one of characterization, calibration and measurement algorithms are embedded into the tuner controller, the tuner controller configured to allow a user to control execution of said at least one of the characterization, calibration and measurement algorithms using the tuner controller. | 04-30-2015 |
20150304075 | Time-Domain Mechanism for Computing Error Vector Magnitude of OFDM Signals - A mechanism for determining an error vector magnitude EVM | 10-22-2015 |
20160028497 | PASSIVE INTERMODULATION TESTING USING PULSE STIMULUS - Disclosed is a passive intermodulation (PIM) test system having a pulsed signal generator configured to generate and apply a pulsed stimulus signal to a device under test. The PIM test system is further configured to measure a power of at least one PIM product generated by a PIM source in the device under test using the pulsed stimulus signal. Also disclosed in a method for Cevaluating PIM in a device under test, the method includes using a pulsed stimulus signal to measure a power of at least one PIM product generated by a PIM source in the device under test. | 01-28-2016 |
20160036492 | RADIO FREQUENCY LEAKAGE DETECTION IN A CABLE PLANT - Embodiments described provide detection of RF leaks in a coaxial cable of a cable plant. One embodiment comprises a mobile device that includes an antenna, a quadrature demodulator, and a controller. The antenna receives an RF signal from an RF leak in the coaxial cable. The quadrature demodulator demodulates the RF signal to generate IQ data. The controller determines changes in a phase angle of the RF signal based on the IQ data generated as the mobile device is in motion, and identifies that the mobile device is travelling toward the RF leak responsive to determining that the phase angle is advancing. The controller identifies that the mobile device is travelling away from the RF leak responsive to determining that the phase angle is retarding. | 02-04-2016 |
20160072549 | NON-CONTACT SENSING AND READING OF SIGNALS TRANSMITTED BY A CABLE - A method for sensing modulated signals in a process facility. The method includes providing a monitoring device that includes a non-contact electromagnetic sensor (EM sensor) configured to sense a modulated signal transmitted on a cable including a conductor coupled to a sensing device or apparatus in the process facility. The monitoring device further includes a non-transitory machine readable storage device and a processor. The non-transitory machine readable storage device stores a data decoding program including protocol information for identifying different communication protocols. The monitoring device is positioned in proximity to the cable for the EM sensor to detect the modulated signal. The data decoding program is implemented by the processor causing the processor to detect the modulated signal and condition the modulated signal to provide a conditioned modulated signal. The conditioned modulated signal is decoded to generate decoded signal data, and the decoded signal data is displayed. | 03-10-2016 |
20160099784 | FREQUENCY-CONVERTING SENSOR AND SYSTEM FOR PROVIDING A RADIO FREQUENCY SIGNAL PARAMETER - A frequency-converting sensor is provided for generating at least a radio frequency signal parameter, such as an electrical power value. The sensor comprises an analog receiving section configured to convert an input signal into corresponding I/Q components using a local oscillator frequency, an analog to digital converting unit configured to convert the corresponding analog I/Q values into digital I/Q values, and a digital processing unit. The digital processing unit comprises an adjustable filtering unit configured to select a sideband of the digital I/Q values, and a calculating unit configured to calculate the radio frequency signal parameter from the I/Q-values of the selected sideband. A system is further provided for analyzing radio frequency input signal parameters, wherein the system incorporates a device under test, which generates the radio frequency signal, the sensor and a display device. | 04-07-2016 |