26th week of 2009 patent applcation highlights part 33 |
Patent application number | Title | Published |
20090161690 | Method and System for Channel Estimation in a Single Channel (SC) Multiple-Input Multiple-Output (MIMO) System Comprising Two-Transmit (2-TX) and Multiple-Receive (M-RX) Antennas for WCDMA/HSDPA) - In a wireless system, a method and system for channel estimation in a single channel MIMO system comprising two-transmit and multiple-receive antennas for WCDMA/HSDPA are provided. A first receive antenna and at least one additional receive antenna may receive a plurality of SC communication signals transmitted from a first and an additional transmit antennas. Estimates of the propagation channels between transmit and receive antennas may be performed concurrently and may be determined from a baseband combined channel estimate. The integration time may be based on channel estimation accuracy and wireless modem performance. The signals received in the additional receive antennas may be multiplied by a rotation waveform to achieve channel orthogonality. The rotation waveform's amplitude and phase components may be modified based on the channel estimates. Rotation of the received signals in the additional receive antennas may be continuous or periodic. | 2009-06-25 |
20090161691 | METHOD FOR DETERMINING MULTITURN MODULO MASTER AXIS DATA - The present invention relates to a method for transmitting multiturn modulo control axis data which includes at least one control axis position value (600°-604°; 245°-248°) and an associated control axis modulo value (720°; 360°) in one communication system which includes at least two participants, at least one real-time data transmission channel (CH1) being provided for the cyclic transmission of data between the participants; the at least one control axis position value (600°-604°; 245°-248°) is transmitted together with the associated control axis modulo value (720°; 360°) in one data telegram (22; 33). | 2009-06-25 |
20090161692 | HIGH PERFORMANCE ETHERNET NETWORKING UTILIZING EXISTING FIBRE CHANNEL FABRIC HBA TECHNOLOGY - This is directed to providing Fibre Channel over Ethernet communication. For example a Fibre Channel over Ethernet (FCoE) enabled device (such as a computer) may include a Fibre Channel over Ethernet Adapter (FCoEA). The FCoEA may include an HBA module. The HBA module may be configured to communicate over the Fibre Channel protocol. The FCoE enabled device may process and encapsulate the HBA module's communication in order to send them over an Ethernet network instead. The FCoE enabled device may process communications directed to various Fibre Channel fabric services by utilizing existing Ethernet services, such as an iSNS server. Thus, the FCoE enabled device can emulate a Fibre Channel network for the HBA module using the Ethernet network and one or more Existing Ethernet services/servers. | 2009-06-25 |
20090161693 | METHOD AND SYSTEM FOR PROGRAMMABLE BANDWIDTH ALLOCATION - The disclosed systems and methods relate to allocating bandwidth to a plurality of ports that access a shared resource. An exemplary system may comprise a multiplexer, a table, and a scheduling circuit. The table may define when a port has access to the shared resource. The table entries may be based on the number of ports with access to the shared resource and the required bandwidth in each of the ports. The scheduling circuit controls the multiplexer according to the table, and the ports may gain access to the shared resource one port at a time. | 2009-06-25 |
20090161694 | PACKET PROCESSING USING A MULTI-PORT MEMORY - A packet processing method for exchanging packet data through a plurality of layers is disclosed, that comprises the steps of storing the entire packet to a packet memory; and storing part of each packet of the packet data used in processes of a layer 2 processing portion and a layer 3 processing portion of the plurality of layers to a multi-port shared memory, the layer 2 processing portion and the layer 3 processing portion accessing the same memory space of the multi-port shared memory. In addition, a pipeline processing system is used so that when the layer 2 processing portion and the layer 3 processing portion access the shared memory, they do not interfere with each other. | 2009-06-25 |
20090161695 | Method of Processing a Signal and Apparatus for Processing a Signal - A method and apparatus for signal processing which enable data compression and recovery with high transmission efficiency are disclosed. Data coding and entropy coding are performed with correlation and grouping is used to increase coding efficiency. A method for signal processing according to this invention, the method includes decapsulating the signal received over an Internet protocol network, obtaining a pilot reference value corresponding to a plurality of data and a pilot difference value corresponding the pilot reference value from the decapsulated signal and obtaining the data using the pilot reference value and the pilot difference value. | 2009-06-25 |
20090161696 | METHOD, APPARATUS AND SYSTEM FOR COMPLEX FLOW CLASSIFICATION OF FRAGMENTED PACKETS - The disclosure discloses a method and system for complex flow classification of fragmented packets. The method includes determining whether a received fragment is an initial fragment, if the received fragment is an initial fragment, storing the initial fragment information and processing it, otherwise, looking for the matched initial fragment information, and performing the same action processing as the initial fragment. The application of the techniques provided in embodiments of the disclosure effectively solve the problem of complex flow classification of the fragmented packets based on the transport layer, thereby processing the initial fragment and its non-initial fragments with the same actions. | 2009-06-25 |
20090161697 | Method and System for Interleaving Video and Data for Transmission over a Network at a Selected Bit Rate - A StatMux system and method are provided for efficiently allocating time slots on the transmission channel between bit streams representing video and bit streams representing data. By providing such a system and method, when a decreased number of data bits need to be transmitted, a decreased number of time slots may be allocated for transmitting the data bits and an increased number of time slots may be allocated for transmitting video bits. When a decreased number of video bits needs to be transmitted, a decreased number of time slots may be allocated for transmitting video bits and an increased number of time slots may be allocated for transmitting data bits. | 2009-06-25 |
20090161698 | METHOD AND APPARATUS FOR DATA PROCESSING - A data processing apparatus, having an overhead branching unit configured to branch a signal data into an overhead and signal data; a control unit configured to retain the overhead; a time slot interchange unit configured to perform time slot interchange on the signal data; and an overhead insertion unit configured to insert the signal data and the overhead output from the time slot interchange unit and outputting as signal data. | 2009-06-25 |
20090161699 | Laser emitting material, method for making the same and use thereof - A solid-state laser emitting material for use in conjunction with a light source includes a polymer matrix functioning as host materials, containing laser dye of rhodamine 590 or rhodamine 610 as gain materials and nano-submicron particles as scatters therein. The lowest lasing threshold of the laser emitting material is approximately 5 mJ/cm | 2009-06-25 |
20090161700 | FIBER LASER - A fiber laser includes: a solid laser fiber doped with a rare earth element; a first grating fiber provided at one end portion of both ends along an optical axis direction of the solid laser fiber; and a first reflective element provided at the other end portion of the solid laser fiber. The first and second reflective elements constitute a resonator structure for the solid laser fiber; the first grating fiber Bragg-reflects only two polarizations of a first polarization having a first wavelength, and a second polarization having a second wavelength different from the first wavelength and being mutually orthogonal with the first polarization in a polarization direction; and at least one reflection wavelength of light which is reflected at the first reflective element and either one wavelength of the two polarizations which are Bragg-reflected at the first grating fiber coincide with each other. | 2009-06-25 |
20090161701 | LASER LIGHT SOURCE DEVICE AND IMAGE DISPLAY APPARATUS - There has been a problem that pumping light leaks from a part having a coating at the joint of a double-clad fiber added with a rare earth and a general single-mode fiber, and heat is generated partly from the fiber by this energy thus causing deterioration of the fiber. Deterioration of a fiber due to residual excitation light can be prevented by preventing residual excitation light in a double-clad fiber from exiting to a single-mode fiber, and the reliability is enhanced. Output of oscillation light can be increased because output of excitation light is not limited. Furthermore, a laser display having a high color reproducibility can be achieved by employing a light source combining a fiber laser light source and a wavelength conversion module. | 2009-06-25 |
20090161702 | Optically pumped disk-type solid state laser oscillator and optically pumped disk-type solid state laser system - An optically pumped disk type solid state laser oscillator includes: a cylindrical shape thin film laser gain medium having a through-hole; a ring mirror whose surface is opposing to a side surface of the thin film laser gain medium; a conical mirror arranged in the through-hole and reflects a light from the ring mirror to a direction perpendicular to the thin film laser gain medium where an output mirror is arranged. The ring mirror, the conical mirror and the output mirror compose a resonator for oscillating a laser beam to be outputted from the output mirror. | 2009-06-25 |
20090161703 | SUM-FREQUENCY-MIXING Pr:YLF LASER APPARATUS WITH DEEP-UV OUTPUT - A method for generating ultraviolet radiation includes sum-frequency mixing in one optically nonlinear crystal fundamental-wavelength radiation generated by a Pr:YLF gain-element with radiation having a second-harmonic wavelength of fundamental-wavelength radiation generated by a Pr:YLF gain-element. The second-harmonic wavelength is generated in another optically nonlinear crystal. The fundamental-wavelength radiation being mixed and the fundamental wavelength radiation from which the second-harmonic radiation is generated may have the same wavelength or different wavelengths. | 2009-06-25 |
20090161704 | INTRACAVITY UPCONVERSION LASER - The present invention relates to an upconversion laser system comprising at least a semiconductor laser having a gain structure ( | 2009-06-25 |
20090161705 | Laser projection utilizing beam misalignment - A laser projection system is provided comprising a laser source, projection optics, scanning optics, and a scanning controller. The laser source comprises at least two punctual sources P | 2009-06-25 |
20090161706 | OPTICAL LEVEL CONTROL DEVICE, METHOD FOR CONTROLLING SAME, AND LASER APPLICATION DEVICE - The optical level control device independently controls the intensities of two beams having different wavelengths that are emitted from a laser oscillator, and the optical level control device comprises a wavelength-dependent wavelength plate and a polarization beam splitter. The wavelength-dependent wavelength plate functions as a half-wave plate with respect to the first light wave and as a full-wave plate with respect to the second light wave. Only the rotation angle of the polarization beam splitter about the optical axis is adjusted to set the intensity of the second light wave transmitted rectilinearly through the polarization beam splitter. The polarization beam splitter is then fixed at the adjusted angle, and the rotation angle of the wavelength plate about the optical axis is adjusted to set the intensity of the first light wave. | 2009-06-25 |
20090161707 | Method and Apparatus for Laser Diode Compensation - The luminance of a laser diode is a function of laser diode drive current. The luminance is also a function of other factors, such as age and temperature. A laser projection device includes laser diodes to generate light in response to a commanded luminance, and also includes photodiodes to provide a measured luminance. The commanded luminance and measured luminance are compared, and drive currents for the laser diodes are adjusted to compensate for changes in laser diode characteristics. | 2009-06-25 |
20090161708 | Optical Communication Light Source Unit and Wavelength Monitoring Control Method - In the present invention, the extremely complicated setting and control and an extremely expensive optical component (wavelength locker) are not required, and optical output wavelength and optical output power can simply be set and controlled at a moderate price. At least one value for determining a dependence of the optical output wavelength on drive current and device temperature and at least one value for determining a dependence of the optical output power on drive current and device temperature in a light emitting device constituting first means | 2009-06-25 |
20090161709 | MULTICHIP PACKAGE, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME - Disclosed herein is a multichip package comprising an optoelectronics assembly; a socket that houses the optoelectronics assembly; the socket being in electrical communication with the optoelectronics assembly; a plate having a first surface and a second surface; the first surface being opposedly disposed to the second surface; a portion of the first surface contacting a portion of the socket to provide thermal contact between the socket and the plate; a serpentine channel being disposed between the plate and the socket to provide a passage for a communication cable that is in operative communication with the optoelectronics assembly; and a heat exchanger in thermal contact with the plate; the heat exchanger being operative to cool the multichip package. | 2009-06-25 |
20090161710 | Laser array circuit - A laser array circuit decreases the size of a circuit pattern. A laser-diode (LD) driving switching element with a low on resistance is used in common with and switches conduction and non-conduction of a large current to each of a plurality of charge capacitors and charge switching elements that accumulate charge in the charge capacitors in respective drive circuits. An LD array and the LD driving switching element are closely located on a light-emitting board. By laying out the LD array and charge capacitors considering only the positional relationship therebetween, the size of a circuit pattern including LDs and the charge capacitors can be decreased. | 2009-06-25 |
20090161711 | Nitride semiconductor laser diode - A nitride semiconductor laser diode has a quantum well layer consisting of a mixed crystal of Al | 2009-06-25 |
20090161712 | SEMICONDUCTOR DEVICE, METHOD OF MANUFACTURING THE SAME, AND PRODUCTION EQUIPMENT OF THE SAME | 2009-06-25 |
20090161713 | SURFACE EMITTING OPTICAL DEVICES - A visible wavelength vertical cavity surface emitting laser suitable for single mode operation has an oxide aperture ( | 2009-06-25 |
20090161714 | OPTIMIZING VCSEL MIRRORS FOR IMPROVING TEMPERATURE RESPONSE - Improved slope efficiency in a VCSEL can be accomplished by selecting particular mirror layer compositions and/or mirror layer configurations that minimize increased reflectivity in the top mirror and/or maximize increased reflectivity of the bottom mirror with increasing temperature. Improved reflectivity of the bottom mirror compared to the top mirror over a desired operating temperature range can be facilitated by (i) selecting mirror pairs for the bottom and/or top mirror that gives the bottom mirror pairs a greater increase in contrast ratio with increasing temperature compared to the top-mirror pairs, and/or (ii) including fewer mirror pairs in the bottom mirror than the number of mirror pairs that would give optimal reflectivity. | 2009-06-25 |
20090161715 | LASER DEVICE - The laser device has a gain medium, first and second clads sandwiching the gain medium in the thickness direction, and a cavity structure for resonating the electromagnetic wave generated in the gain medium. The gain medium includes a plurality of active regions for generating an electromagnetic wave and at lease one connecting region sandwiched among the active regions. The first and second clads are each formed of a negative permittivity medium having a permittivity the real part of which is negative relative to the electromagnetic wave. A potential-adjusting portion is arranged between the connecting region and the first clad and between the connecting region and the second clad for adjusting the electric potential of the connecting region. | 2009-06-25 |
20090161716 | Laser diode - A laser diode capable of effectively inhibiting effects of feedback light is provided. A laser diode includes a substrate, and a laminated structure including a first conductive semiconductor layer, an active layer having a light emitting region, and a second conductive semiconductor layer having a projecting part on the surface thereof, on the substrate, wherein a feedback light inhibition part is provided on a main-emitting-side end face, and effects of feedback light in the vicinity of lateral boundaries of the light emitting region are inhibited by the feedback light inhibition part. | 2009-06-25 |
20090161717 | BRAGG REFLECTOR GRATING - A Bragg reflector grating comprises a plurality of chirped grating sections ( | 2009-06-25 |
20090161718 | TWO-BEAM SEMICONDUCTOR LASER DEVICE - A two-beam semiconductor laser device | 2009-06-25 |
20090161719 | LINEAR ELECTRON SOURCE, EVAPORATOR USING LINEAR ELECTRON SOURCE, AND APPLICATIONS OF ELECTRON SOURCES - An evaporation apparatus for evaporating a material to be deposited is described. The evaporation apparatus includes at least one evaporation crucible having a body with an area for receiving the material to be deposited at one side; a linear electron source being positioned adjacent to the evaporation crucible for impingement of an electron beam on another side. The linear electron source includes a housing acting as a first electrode, the housing having side walls; slit opening in the housing for trespassing of a electron beam, the slit opening defining a length direction of the source; a second electrode being arranged within the housing and having a first side facing the slit opening; and at least one gas supply for providing a gas into the housing, wherein the first electrode is the anode and the second electrode is the cathode. | 2009-06-25 |
20090161720 | PASSIVE THERMAL IMAGE GLASS BREAKAGE DETECTOR - A system and method for detecting glass breakage using thermal imaging is provided. The system includes an infrared image detector for acquiring an infrared image of a monitored area, and a signal processor for processing the acquired images to determine removal of a glass door or window based on a comparison of the thermal signature of the acquired image against the thermal signature of a reference image. Specifically, signal processor subtracts the reference image data from the acquired image data, which results in a substantially uniform image when the acquired image matches the reference image. On the other hand, the image resulting from the subtraction exhibits significant non-uniformity when the acquired image does not match the reference image, as would be the case if the pane of glass of a door or window were broken, removed or opened. | 2009-06-25 |
20090161721 | METHOD FOR TESTING A HEAT PIPE AND CORRESPONDING TEST DEVICE - The operational reliability of a heat pipe | 2009-06-25 |
20090161722 | AUTOMATIC SHUTDOWN OR THROTTLING OF A BIST STATE MACHINE USING THERMAL FEEDBACK - A Built-In-Self-Test (BIST) state machine providing BIST testing operations associated with a thermal sensor device(s) located in proximity to the circuit(s) to which BIST testing operations are applied, and a design structure including the BIST state machine embodied in a machine readable medium are provided. The thermal sensor device compares the current temperature value sensed to a predetermined temperature threshold and determines whether the predetermined threshold is exceeded. A BIST control element suspends the BIST testing operation in response to meeting or exceeding said predetermined temperature threshold, and initiates resumption of BIST testing operations when the current temperature value normalizes or is reduced. A BIST testing methodology implements steps for mitigating the exceeded temperature threshold condition in response to determining that the predetermined temperature threshold is met or exceeded. These steps include one of: ignoring the BIST results of the suspect circuit(s), or by causing the BIST state machine to enter a wait state and adjusting operating parameters of the suspect circuits while in the wait state. | 2009-06-25 |
20090161723 | PERFORMANCE TESTING APPARATUS FOR HEAT PIPES - A performance testing apparatus for a heat pipe includes a heating set, a cooling set, and a supporting set supporting the heating set and the cooling set thereon. Position and orientation of the heating and cooling sets on the supporting set are adjustable. The heating set includes a first immovable portion and a first movable portion cooperatively defining a first channel therebetween for receiving an evaporating section of the heat pipe. A temperature sensor is exposed to the first channel for detecting temperature of the evaporating section. A cooling set includes a second immovable portion and a second movable portion cooperatively defining a second channel therebetween for receiving a condensing section of the heat pipe. A temperature sensor is exposed to the second channel for detecting temperature of the condensing section of the heat pipe. | 2009-06-25 |
20090161724 | Determining the Temperature of Silicon at High Temperatures - The temperature of an object such as a semiconductor wafer that includes silicon can be determined based on the variation of the optical absorption coefficient of silicon with temperature. Temperatures above about 850° C., can be found by measuring phenomena that are affected by the magnitude of the optical absorption coefficient, especially at wavelengths >˜1 μm. Phenomena could include measuring light reflected, transmitted, emitted, absorbed, or scattered by the wafer and deriving the absorption coefficient from the measurements and then deriving temperature from the absorption coefficient. Temperature could be determined from a model relating phenomena directly to temperature, the model constructed based on absorption behaviour and techniques discussed herein. The resulting temperature could be used to calibrate or control a rapid thermal processing chamber or other apparatus. | 2009-06-25 |
20090161725 | Process-invariant low-quiescent temperature detection circuit - In one embodiment, an integrated circuit is provided for detecting when a temperature reaches a specified value. The circuit includes a differential circuit block having first and second transistors. A control terminal of the first transistor is coupled to a first voltage source, and a control terminal of the second transistor is coupled to a second voltage source. The second transistor has an area larger than the first transistor. The differential circuit block compares a first current flowing into the first transistor and a second current flowing into the second transistor. The differential circuit block outputs a signal to indicate that the specified temperature has been reached when the first current equals the second current according to specified values of the first voltage source, the second voltage source, and the ratio of the areas of the first and second transistors. A single-ended circuit block amplifies the output signal of the differential circuit block to a predetermined amplitude. | 2009-06-25 |
20090161726 | Temperature detection system - A temperature detection system includes a power semiconductor device, a chip temperature detection device for detecting a temperature of the power semiconductor device, loss-related characteristic value acquiring means for acquiring a loss-related characteristic value that is a characteristic to decide a loss of the power semiconductor device, difference value calculating means for calculating, from the loss-related characteristic value, a difference value between the temperature of the power semiconductor device and a temperature detected by the chip temperature detection device, a corrected temperature signal generating part for generating a corrected temperature signal by adding the temperature detected by the chip temperature detection device and the difference value, and an output part for outputting the corrected temperature signal to the outside. | 2009-06-25 |
20090161727 | Method and Apparatus for a Temperature Sensor for Measuring Peak Temperatures - A method and apparatus for an irreversible temperature sensor for measuring a peak exposure temperature. The apparatus is fabricated by printing an admixture of conductive nanoparticles on a dielectric substrate to form a film. The film has an electrical resistance that is inversely proportional to the exposure temperature. The electrical resistance also irreversibly decreases as the exposure temperature of the film increases. A portion of the film is exposed to a pulse of electromagnetic energy sufficient to render it substantially more electrically conductive than the portion that was not exposed. In use, the peak exposure temperature is determined by measuring the electrical resistance of the non-altered portion of the film and the electrical resistance of the portion that was exposed to the pulse of electromagnetic energy, and subtracting the electrical resistance of the altered portion from the electrical resistance of the portion that was not altered, to provide a difference value. The peak exposure temperature is then be calculated as a function of the difference value. | 2009-06-25 |
20090161728 | SYSTEM AND METHOD FOR INTEGRATING MULTIPLE RADIOS OF DIFFERENT PROTOCOLS - A method, apparatus, and electronic device for regulating communication are disclosed. A first radio | 2009-06-25 |
20090161729 | Wideband frequency hopping spread spectrum transceivers and related methods - Systems and methods are disclosed that provide ultra-wideband frequency hopping spread spectrum (UWB-FHSS) solutions for transceiver architectures. These UWB-FHSS transceiver architectures can transmit and accurately digitize frequency hops over an extremely wide bandwidth while using a relatively slow analog-to-digital converter (ADC) without suffering from unacceptable performance degradation. For example, ADCs can be used having sample rates lower than standard Nyquist criteria would require for the bandwidth of the spread spectrum utilized. | 2009-06-25 |
20090161730 | Wideband frequency hopping spread spectrum transmitters and related methods - Systems and methods are disclosed that provide ultra-wideband frequency hopping spread spectrum (UWB-FHSS) solutions for transmit and receive architectures. These UWB-FHSS transmit and receive architectures can transmit signals over an extremely wide bandwidth while using a relatively slow analog-to-digital converter (ADC) without suffering from unacceptable performance degradation. For example, ADCs can be used having sample rates lower than standard Nyquist criteria would require for the bandwidth of the spread spectrum utilized. | 2009-06-25 |
20090161731 | Wideband frequency hopping spread spectrum receivers and related methods - Systems and methods are disclosed that provide ultra-wideband frequency hopping spread spectrum (UWB-FHSS) solutions for receive architectures. These UWB-FHSS receive architectures can receive signals transmitted over an extremely wide bandwidth while using a relatively slow analog-to-digital converter (ADC) without suffering from unacceptable performance degradation. For example, ADCs can be used having sample rates lower than standard Nyquist criteria would require for the bandwidth of the spread spectrum utilized. | 2009-06-25 |
20090161732 | METHOD AND APPARATUS FOR MULTIPLE ACCESS OVER A COMMUNICATION CHANNEL - A communication technique based on direct sequence spread spectrum signaling employs, for all users sharing an access channel, a single spreading code that has a duration sufficiently longer than the symbol length that the likelihood of confusion between users is minimized if not eliminated. The length of the spreading code is sufficiently long that contention events can occur only when two bursts occur at the receiver within one chip time of one another. | 2009-06-25 |
20090161733 | RADIO COMMUNICATION SYSTEM, TRANSMITTER, RECEIVER AND RADIO COMMUNICATING METHOD - A radio communication system having a radio transmitter and a radio receiver and adopting multiple carrier modulation and code spreading modulation methods is disclosed. The radio communication system comprises a selecting unit provided in the radio transmitter or the radio receiver, for selecting an interleaving mode out of plural interleaving modes depending on radio propagation path conditions; a symbol configuration unit provided in the radio transmitter; and a symbol reconfiguration unit provided in the radio receiver. The symbol configuration unit configures information symbols to be transmitted by the radio transmitter in both time and frequency directions in a pattern according to the interleaving mode selected by the selecting unit, and the symbol reconfiguration unit reconfigures information symbols received by the radio receiver in both time and frequency directions in an inverse pattern of the pattern. | 2009-06-25 |
20090161734 | METHOD AND SYSTEM FOR INFORMATION TRANSMISSION - The invention relates to the information transmission between a data-transmitting apparatus and a read- and/or write module, in particular for the use of access control. According to the invention, data to be transmitted is represented as a digital signal by the data-transmitting apparatus, and this signal is converted into an ultra-broadband signal by way of the spread spectrum method, and capacitively and/or resistively transferred via the body of the user to the write- and/or read module. | 2009-06-25 |
20090161735 | Direct sequence spread spectrum device and method for communication therewith - The communication device according to the present invention is a direct sequence spread spectrum device that performs a communication by using multiple different spread codes for multiple symbols. The direct sequence spread spectrum device according to the present invention includes: a correlation unit that calculates a correlation between each of the multiple different spread codes and a received signal spread by each of the multiple different spread codes, and that outputs a correlation degree for each of the spread codes; and a determination unit that demodulates the received signal to a symbol based on a value of the correlation degree for each of the spread codes. | 2009-06-25 |
20090161736 | SYSTEM AND METHOD FOR FAST CODE PHASE AND CARRIER FREQUENCY ACQUISITION IN GPS RECEIVER - A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths. | 2009-06-25 |
20090161737 | METHOD AND APPARATUS FOR PROCESSING A COMMUNICATION SIGNAL - An access terminal for processing a communication signal includes a receiver. The receiver is configured to determine a bias point for the communication signal based on a quality measurement of the communication signal, the quality measurement having a carrier-to-interference (C/I) estimate associated therewith. The receiver is further configured to determine a C/I cap for the communication signal using the C/I estimate, the C/I cap being configured to cap a signal to interference-plus-noise ratio (SINR) of the communication signal. In addition, the receiver is configured to process the communication signal using the determined bias point and the determined C/I cap. A method is also provided for processing a communication signal. | 2009-06-25 |
20090161738 | Transceiver system with reduced latency uncertainty - A transceiver system with reduced latency uncertainty is described. In one implementation, the transceiver system has a word aligner latency uncertainty of zero. In another implementation, the transceiver system has a receiver-to-transmitter transfer latency uncertainty of zero. In yet another implementation, the transceiver system has a word aligner latency uncertainty of zero and a receiver-to-transmitter transfer latency uncertainty of zero. In one specific implementation, the receiver-to-transmitter transfer latency uncertainty is eliminated by using the transmitter parallel clock as a feedback signal in the transmitter phase locked loop (PLL). In one implementation, this is achieved by optionally making the transmitter divider, which generates the transmitter parallel clock, part of the feedback path of the transmitter PLL. In one implementation, the word aligner latency uncertainty is eliminated by using a bit slipper to slip bits in such a way so that the total delay due to the word alignment and bit slipping is constant for all phases of the recovered clock. This allows for having a fixed and known latency between the receipt and transmission of bits for all phases of parallelization by the deserializer. In one specific implementation, the total delay due to the bit shifting by the word aligner and the bit slipping by the bit slipper is zero since the bit slipper slips bits so as to compensate for the bit shifting that was performed by the word aligner. | 2009-06-25 |
20090161739 | RF TRANSCEIVER HAVING ADAPTIVE MODULATION - A modulation control module for use in an RF transceiver, the modulation control module includes a processing module and memory. The memory is operably coupled to the processing module, wherein the memory stores operational instructions that causes the processing module to: receive a multiple path channel estimation; and determining, for each transmit path of a multiple input multiple output (MIMO) wireless communication, a modulation control signal based on a corresponding portion of the multiple path channel estimation. | 2009-06-25 |
20090161740 | TRANSCEIVER WITH SWITCH CIRCUIT FOR ROUTING DATA FROM RECEIVER TO TRANSMITTER - A transceiver includes a receiver unit including a clock and data recovery unit. The transceiver includes a transmitter unit and a digital core coupled to the receiver unit and the transmitter unit. A switch circuit is positioned after the clock and data recovery unit, and is configured to route data from the receiver unit to the transmitter unit in a test mode of the transceiver. | 2009-06-25 |
20090161741 | Methods and Apparatus to Combine Data from Multiple Sources to Characterize Communication Systems - A data collector combiner, a network management system, a DSL Optimizer (DSLO), or any combination thereof collects data, parameter(s), characteristic(s), information, or any combination thereof from two or more data sources. The data collector probabilistically combines at least the first and second data to estimate at least one DSL characterizing parameter. | 2009-06-25 |
20090161742 | Receiver Bit Rate Processing - This patent application relates generally to wireless communications systems, and, more particularly, mobile station receiver architecture. | 2009-06-25 |
20090161743 | INTEGRATED COMPACT EYE PATTERN ANALYZER FOR NEXT GENERATION NETWORKS - A portable hand-held battery powered eye pattern analyzer is provided that can analyze signal quality of a high speed digital communication network. The system is 10 times smaller in volume and 4 times lighter than the bench-top equivalent instruments. The system includes a housing containing a display, keypad, power supply, battery pack, and RF sampler board along with connections for electrical inputs, optical inputs, clock signal inputs, and clock recovery signal inputs. The sampler circuit board can support connections, such as a USB plug for attachment to a personal computer. The RF sampler board contains the following elements: (1) A dual sampler for two-channel electrical inputs. (2) An Optical-to-Electrical O/E conversion module. (3) A clock recovery unit (CRU) module to recover the clock from the electrical or optical pulse pattern signal. (4) A trigger circuit that accepts an input clock and uses that clock to trigger the sampling of the data signal. (5) A PRBS generator that could be used as stimulus for testing high speed devices, and (6) A controller such as an FPGA that processes the sampled signals and provides statistical analysis along with eye patterns to a display as controlled using the keyboard. | 2009-06-25 |
20090161744 | METHOD FOR ESTIMATING AND MONITORING TIMING ERRORS IN PACKET DATA NETWORKS - A system and method is provided for estimating the T1 timing error and clock recovery errors by processing timing information from the associated pseudowire packet stream(s) from which the Ti is derived. The timing errors are presented as MTIE measurements which are used to present alarms for a Network Operation Control centre and are used to accurately alarm error conditions where the regenerated or derived T1 signal does not meet MTIE or clock accuracy errors. This alarm is intended to detect conditions of excessive packet jitter, wander or phase transients which may exist in the data network over which the pseudowire stream is transported. In another aspect, the errors are used to control the regeneration of the T1 clock information. | 2009-06-25 |
20090161745 | Parameter Estimation for Modulated Signals - A system includes a receiver for receiving a modulated signal. The receiver includes a gain estimator for converting complex data representative of constellation points of the modulated signal into scalar data representation. The gain estimator is configured to fold a first portion of the scalar data representation onto a second portion of the scalar data representation. The gain estimator is further configured to estimate a constellation gain value from the folded first portion and the second portion of the scalar data representation. | 2009-06-25 |
20090161746 | RECEIVER ADJUSTMENT BETWEEN PILOT BURSTS - A receiver may train its equalizer using consecutive pilot bursts, divide the traffic between the consecutive pilot bursts into multiple sub-segments, and interpolate the trained equalizer coefficients to obtain the coefficients for equalizing one or more of the sub-segments. The receiver may also determine signal to interference and noise ratio (SINR) values based on each of the consecutive pilot bursts, and interpolate the SINR for decoding one or more of the sub-segments. The receiver may be an access terminal receiver operating in a code division multiple access (CDMA) cellular system. | 2009-06-25 |
20090161747 | NOISE PREDICTION-BASED SIGNAL DETECTION AND CROSS-TALK MITIGATION - In an exemplary embodiment, noise prediction-based data detection is described with respect to a SERDES (serializer/deserializer) backplane primary channel subject to inter-symbol interference (ISI) noise and added cross-talk noise from other channels. Noise prediction-based data detection combines an added error component from inter-symbol interference (ISI) noise and an added error component from cross-talk noise into an overall noise prediction error term and cancels effects of residual ISI and cross-talk for various components of the exemplary embodiment. | 2009-06-25 |
20090161748 | MMSE-DFE EQUALIZATION WITH ANTENNA DIVERSITY FOR MOBILE DTV - A decision feedback equalizer has a feedback filter and K feed forward filter branches. Each of the K feed forward filter branches receives an input signal from a corresponding one of a plurality of channels associated with a corresponding one of a plurality of antennas, where K>1. Each of the K feed forward filter branches provides an output. An instantaneous SNR level Y | 2009-06-25 |
20090161749 | METHOD AND APPARATUS FOR IFDMA RECEIVER ARCHITECTURE - A method and receiver for processing a composite signal ( | 2009-06-25 |
20090161750 | MULTIPLEXING VIDEO USING A DSP - A method of operating a video processing system is disclosed. A plurality of video streams that were produced by a plurality of video Analog to Digital Converters (ADCs) are received into a Digital Signal Processor (DSP). The plurality of video streams are multiplexed in the DSP into an unencoded multiplexed video stream. The unencoded multiplexed video stream is transferred from the DSP to a video encoder. | 2009-06-25 |
20090161751 | VIDEO COMPRESSION AND TRANSMISSION SYSTEM WITH TRANSMITTER SIDE MEMORY RESTRICTION - A video compression and transmission system that uses a novel rate-distortion algorithm is disclosed. The video compression and transmission scheme is a modification of the JPEG 2000-based video transmission systems for constant bit-rate channels. | 2009-06-25 |
20090161752 | METHOD AND SYSTEM OF PROVIDING SWITCH BROADCAST TELEVISION - A method and system of providing switched broadcasting of content to a number of consumers. The content may be transmitted in pieces over broadcast and switched transmission tiers. The broadcast tier being characterized by the continuous transmission of content and the switched tier being characterized by on demand or request based transmission of content. | 2009-06-25 |
20090161753 | VIRTUALLY LOSSLESS VIDEO DATA COMPRESSION - An apparatus and method of performing YUV (or YCrCb) video compression prior to storage within a memory and decompression upon retrieval of the blocks from memory. Compression is performed utilizing a quantizer to compress video data to a desired overall compression ratio R, even though the luma and chroma contributions to compression can differ for each subblock, each preferably selected in response to texture estimation. Selections are made for each subblock to perform either linear or non-linear quantization during compression. Compression is performed without utilizing data from blocks outside of the block being compressed, wherein video blocks can be retrieved and decompressed in any desired order. In one implementation, an encoder non-sequentially selects blocks from memory which are then decompressed and encoded. The compression may be beneficially utilized in a number of different video transmission and storage applications without departing from the invention. | 2009-06-25 |
20090161754 | Enhancement of decompressed video - A method and apparatus for enhancing video quality by adaptively removing distortions and ringing effects embedded in decompressed video signals. The apparatus can operate in conjunction with decoder devices installed in set-top boxes, satellite receivers, TV broadcast channel servers, digital still cameras, DVD players and recorders, large screen TV sets, media players, and the like. | 2009-06-25 |
20090161755 | DEVICE ADAPTIVE VIDEO TRANSMISSION SYSTEM FOR USE WITH LAYERED VIDEO CODING AND METHODS FOR USE THEREWITH - A video transmission system includes a transceiver module that receives a device parameter from a remote device and that transmits a video signal to the remote device, wherein the video signal is transmitted as at least one separate video layer stream chosen from, an independent video layer stream and at least one dependent video layer streams that require the independent video layer for decoding. A control module chooses the at least one separate video layer stream based on the device parameter. | 2009-06-25 |
20090161756 | Method and apparatus for motion adaptive pre-filtering - A video filter includes a motion detector to detect motion between frames of a video for each pixel, a shape adaptive spatial filter and a weighted temporal filter. The spatial filter and the temporal filter are smoothly mixed together based on the amount of motion detected by the motion detector for each pixel. When the motion detected by the motion detector is low, the video filter tends to do more temporal filtering. When the motion detected by the motion detector is high, the video filter tends to do more spatial filtering. | 2009-06-25 |
20090161757 | Method and Apparatus for Selecting a Coding Mode for a Block - A method and apparatus for processing an input image are disclosed. For example, the method receives a block of pixels from the input image, and selects a coding mode for the block of pixels based on at least one coding mode of at least one neighbor block of the block of pixels. The method determines whether the coding mode will result in all zero coefficients for the block of pixels, and selects the coding mode for the block of pixels if the coding mode will result in all zero coefficients for the block of pixels. | 2009-06-25 |
20090161758 | CODE AMOUNT CONTROL METHOD, CODE AMOUNT CONTROL DEVICE, AND CAMERA SYSTEM - The code amount in first video data is counted. The difference between the counted code amount and a predetermined code amount is summed. A target code amount for second video data to be encoded after the first video data is corrected based on the accumulated sum. An evaluation function for the second video data is selected based on the calculation of the motion vector of the second video data. The process calculates a first value based on a first quantization parameter for the first video data, the selected evaluation function and the counted code amount, and a second value based on a second quantization parameter for the second video data, the selected evaluation function and the corrected target code amount, and determines the second quantization parameter so that a difference between the first value and the second value is less than or equal to a predetermined amount. | 2009-06-25 |
20090161759 | METHOD AND APPARATUS FOR VIDEO CODING ON PIXEL-WISE PREDICTION - Provided is a video encoding and decoding method and apparatus using pixel-based prediction. A pixel-based video encoding apparatus includes a block prediction unit, a residual image generation unit, a pixel prediction unit, and an entropy-coding unit. The block prediction unit performs temporal or spatial prediction between a reference image and a current image in order to generate a prediction block corresponding to a current block to be encoded. The residual image generation unit generates a residual image block composed of a residual signal corresponding to a difference between pixels of the prediction block and pixels of the current block. The pixel prediction unit determines whether to apply differential pulse coded modulation (DPCM) to each of pixels of the residual image block based on a rate distortion optimization (RDO) value calculated for the case where DPCM is applied to each of the pixels of the residual image block and a RDO value calculated for the case where DPCM is not applied to each of the pixels of the residual image block. The entropy-coding unit performs entropy-coding on the residual image block. | 2009-06-25 |
20090161760 | VIDEO PROCESSING SYSTEM WITH LAYERED VIDEO CODING AND METHODS FOR USE THEREWITH - A video processing system includes a video encoder that encodes a video stream into a independent video layer stream and a first dependent video layer stream based on a motion vector data or grayscale and color data. | 2009-06-25 |
20090161761 | MOTION REFINEMENT ENGINE WITH FLEXIBLE DIRECTION PROCESSING AND METHODS FOR USE THEREWITH - A motion refinement engine can be used in a video encoder for encoding a video input signal that includes a sequence of images that are segmented into a plurality of macroblocks. The motion refinement engine includes a motion search module, that generates at least one motion search motion vector for a macroblock of the plurality of macroblocks based on a first plurality of directions. A motion refinement module generates at least one refined motion vector for the macroblock of the plurality of macroblocks, based on a second plurality of directions, wherein the second plurality of directions differ from the first plurality of directions. In a further embodiment, motion search, motion refinement, and motion compensation are selectively performed in a single pass. | 2009-06-25 |
20090161762 | METHOD OF SCALABLE VIDEO CODING FOR VARYING SPATIAL SCALABILITY OF BITSTREAM IN REAL TIME AND A CODEC USING THE SAME - Methods of coding a bitstream in which the frames are encoded for enabling a spatial resolution is changed in real time, extracting the bitstream by adding a signaling message indicating that the spatial resolution is changed, and decoding the bitstream in which the spatial resolution is changed in real time after actively detects whether the spatial resolution is changed without additional information, and a codec using the methods are provided. Therefore, if the network has the restricted environment that the resolution is changed in real time while a video encoding and decoding or if there is a need to output the video whose the spatial resolution is partly changed in the decoder, the present invention provides methods to actively cope with the spatial resolution change of the video so as to efficiently watch the video. | 2009-06-25 |
20090161763 | MOTION ESTIMATION WITH AN ADAPTIVE SEARCH RANGE - A method and apparatus for estimating motion of a pixel block in a first frame, the method including searching a first area in a second frame to identify a first matching block that corresponds to the pixel block, the first matching block including a first error value that is a minimum of at least one error criteria between the pixel block and the first matching block, calculating a first motion vector associated with the first matching block. The method further including searching a second area in the second frame to identify a second matching block that corresponds to the pixel block, the second matching block including a second error value that is a minimum of the at least one error criteria between the pixel block and the second matching block, calculating a second motion vector associated with the second matching block and selecting a final motion vector between the first and second motion vectors based on the first and second error value. | 2009-06-25 |
20090161764 | VIDEO ENCODER WITH RING BUFFERING OF RUN-LEVEL PAIRS AND METHODS FOR USE THEREWITH - A run-level coding module can be used in a video encoder that generates a processed video signal from a video input signal. The run-level coding module includes a run-level coder that generates a first plurality of run-level pairs from a first stream of quantized data. A first ring buffer buffers a first number of the first plurality of run-level pairs. The processed video signal is generated based on the buffered first number of run-level pairs. | 2009-06-25 |
20090161765 | Enabling Trick Plays during VBR Playback of a CBR Transmitted Media File - A method and system for enabling trick plays during a variable bit rate (VBR) playback of a media file transmitted to a user media device as a constant bit rate (CBR) flow includes determining a plurality of access points within the media file. The media file is configured to be played back from each of the plurality of access points. A minimum buffer value is calculated for each of the plurality of access points. The minimum buffer value identifies a minimum amount of the media file to transmit to the user media device before beginning playback of the media file from each of the plurality of access points to substantially ensure that the media file is configured to be played back from each of the plurality of access points continuously and uninterruptedly at a variable bit rate. | 2009-06-25 |
20090161766 | System and Method for Processing Video Content Having Redundant Pixel Values - A system and method for processing of video content containing redundant pixels using the picture recombination technique, with one of the main application in video transcoding process. The picture recombination process employs a quality ranking criterion to adaptively select the best region from the co-located regions of redundant pictures as the region for output. An approximation for quality ranking between a decoded picture region and an original picture region has been developed to guide the selection for recombination because the original picture is not available to the transcoder. The quality ranking formula is further modified as a simple linear function depending on the quantization scale, the bit count, and complexity measure of the region. | 2009-06-25 |
20090161767 | Device and Method for Merging Codecs - A unified codec device and a method thereof are disclosed. The unified codec device in accordance with an embodiment of the present invention comprises a decoding control unit, which sets a connection relation of functional units by interpreting connection information from an inputted universal bitstream or data, and a functional group, which consists of a plurality of functional units and in which functional units corresponding to a sequential start control of the decoding control unit are sequentially activated to process a bitstream or the data, using the control parameter, to output the inputted bitstream as image data. Using the functional unit recombination technique in accordance with the present invention, the bitstreams based on various decoding standards can be encoded/decoded without restriction. | 2009-06-25 |
20090161768 | METHOD AND APPARATUS FOR VIDEO DECODING, IN THE PRESENCE OF NOISE - A method and apparatus for decoding video data that is encoded by bit rate control to keep a bandwidth of a bit stream in a predetermined range are provided. The encoded video data is decoded, picture quality estimation information is estimated, the estimation including information about a bit stream size of a decoded video frame, the number of fragmented macro blocks included in the video frame, and the number of skip-mode macro blocks included in the video frame, the picture quality of the video data is determined based on a correlation between picture quality estimation information and SNR, and the video data is output by applying a picture quality improving algorithm to the video data, if the determined picture quality is lower than a predetermined level. | 2009-06-25 |
20090161769 | SEAMLESS DIGITAL CHANNEL CHANGING - Seamless channel changing in a digital-television-based entertainment network can be implemented, for example, by providing an intra frame to a client device upon a change to a new channel even when the broadcast video data is previously compressed. In an exemplary implementation, a method includes: receiving a stream of broadcast video data that is encoded; continuously decoding the stream of broadcast video data into successive decoded images; and transmitting, responsive to a channel change message received from a client device, an intra frame that has been encoded from a decoded image of the successive decoded images. Other exemplary implementations are described herein. | 2009-06-25 |
20090161770 | CODING ADAPTIVE DEBLOCKING FILTER AND METHOD FOR USE THEREWITH - A deblocking filter module can be used in a video processing device that processes a video input signal in accordance with a plurality of coding parameters. The deblocking filter module includes an adaptive deblocking filter that receives a plurality of samples and produces a plurality of filtered samples in response thereto, the adaptive deblocking filter having at least one filter parameter that is controllable in response to a filter control signal. A filter control module generates the filter control signal based on the plurality of coding parameters. | 2009-06-25 |
20090161771 | Fft carrier frequency offset estimation for ofdm signal - There is being disclosed an OFDM signal receiver for detecting carrier frequency offset. When FFT transform of the signal is processed in the receiver, an estimator applies the spectrum shape of the FFT transform for estimating the carrier frequency offset. | 2009-06-25 |
20090161772 | Downlink channel transmission device and method thereof - A transmission device able to improve signal quality in a downlink channel is disclosed. The transmission device is for transmitting a control channel, a pilot channel, and a data channel, and includes a unit for transmitting the data channel by using a multi-beam or a variable directional beam, and a unit for transmitting a known signal as the pilot channel by using the multi-beam or the variable directional beam. The multi-beam includes plural fixed directional beams having respective fixed directions different from each other, and the variable directional beam is of a direction changing along with a position of a mobile terminal. | 2009-06-25 |
20090161773 | Channel Estimation Of Orthogonal Frequency Division Multiplexed Systems - Methods and apparatus, including computer program products, are provided for channel estimation. In one aspect, there is provided a receiver including a demodulator for decoding a signal including at least one of a transmission parameter signaling (TPS) carrier and a data carrier. The receiver further includes a channel estimator, coupled to the demodulator, for determining a channel estimate for the TPS carrier. Moreover, the receiver includes an interpolator, coupled to the channel estimator, for determining, based on the determined channel estimate for the TPS carrier, another channel estimate for the data carrier. Related systems, methods, and articles of manufacture are also disclosed. | 2009-06-25 |
20090161774 | Apparatus and Method for Dynamic Frequency Selection in ofdm Networks - A wireless endpoint is a Wireless Regional Area Network (WRAN) endpoint, such as a base station (BS) or customer premise equipment (CPE). The WRAN endpoint can transmit an orthogonal frequency division multiplexed (OFDM) signal comprising 2048 subcarriers in a channel. The 2048 subcarriers are divided into 16 subcarrier sets, or subchannels, each subcarrier set comprising 128 subcarriers. However, upon detection of an incumbent narrowband signal in the channel, the WRAN endpoint forms the OFDM signal for transmission in such a way that the WRAN endpoint excludes use of those one, or more, of the subcarrier sets that would interfere with the incumbent narrowband signal. | 2009-06-25 |
20090161775 | METHOD AND APPARATUS OF ASSIGNING IN WIRELESS COMMUNICATION SYSTEMS - A method and apparatus of assigning selected interlace mode, the method comprising generating SelectedInterlaceAssignment message comprising SelectedInterlaceAssignment message comprising an 8 bit Message ID field, a 12 bit PilotPN field, a 1 bit SelectedInterlacesEnabled field, a 4 bit NumAssignedInterlaces field, and a 3 bit InterlaceID field, wherein, the PilotPN field is set to a PilotPN of the sector that sends SelectedInterlace Assignment message, the NumAssignedInterlaces field is set to the number of assigned interlaces, the InterlaceID field is set to an interlace assigned to the access terminal for SelectedInterlace operation and transmitting the generated SelectedInterlaceAssignment message over an OFDM communication link. | 2009-06-25 |
20090161776 | SYSTEM AND METHOD FOR FREQUENCY DIVERSITY - A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved. | 2009-06-25 |
20090161777 | Overlay Modulation Technique for COFDM Signals Based on Amplitude Offsets - Systems and methods are presented for transmitting additional data over preexisting differential COFDM signals by changing the amplitude of the legacy data symbols. In exemplary embodiments of the present invention, additional data capacity can be achieved for a COFDM signal which is completely backwards compatible with existing legacy satellite broadcast communications systems. In exemplary embodiments of the present invention, additional information can be overlaid on a legacy COFDM signal by applying an amplitude offset to the legacy symbols. In exemplary embodiments of the present invention, special receiver processing can be implemented to extract this additional information, which can include performing channel equalization across frequency bins to isolate the amplitude modulated overlay signal. For example, at each FFT symbol time, average power across neighboring active data bins can be used to determine the localized power at the corresponding FFT bins, and a channel inversion can then, for example, be performed on the data bins to restore, as best as possible, the original transmitted symbol amplitude. | 2009-06-25 |
20090161778 | Transmitter and Carrier Leak Detection Method - It is intended to compensate for a carrier leak for any carrier arrangement. There are provided a carrier leak compensating means | 2009-06-25 |
20090161779 | METHOD FOR INTER-CARRIER INTERFERENCE CANCELLATION AND EQUALIZATION METHOD, APPARATUS, AND OFDM RECEIVER USING THE METHOD - An inter-carrier interference ICI cancellation method of a k | 2009-06-25 |
20090161780 | OPTIMUM BER ADJUSTMENT FOR ADAPTIVE MULTI-CARRIER MODULATION - The present invention relates to the fields of adaptive multi-carrier data transmission schemes. The present invention especially relates to a method of adapting transmission parameters of a group of subcarriers, a software program product and a communication device. The method of adapting transmission parameters of a group of subcarriers comprises steps of: determining a channel quality value for each subcarrier; establishing an order of assignment groups, each assignment group comprising one or more subcarriers, based on the channel quality values; assigning, in the order of the assignment groups, a transmission parameter to every assignment group, whereby assigning a transmission parameter to an assignment group comprises assigning the transmission parameter to all subcarriers of the assignment group; and calculating a link performance value based on previously assigned one or more transmission parameters; whereby the step of assigning a transmission parameter to every assignment group is based on the calculated link performance value. | 2009-06-25 |
20090161781 | Characterizing channel response using data tone decision feedback - Characterizing channel response using data tone decision feedback. In addition, to pilot tones which may be existent within an orthogonal frequency division multiplexing (OFDM) signal, one or more date tones within that same signal may be employed to assist with channel estimation (alternatively, detection). Once a data tone qualifies as a pseudo-pilot tone, it may be used with the pilot tones for channel estimation. A qualifier considers slicer error associated with hard decisions for a data tone to determine if it is a candidate for assistance within channel estimation. A frame within an OFDM signal may, in one situation, include no pilot tones at all, and a previously calculated channel estimate may be used to process that frame. In addition, fewer pilot tones than needed to perform accurate channel estimation (based on the channel delay spread) may be employed by using one or more pseudo-pilot tones (e.g., qualified data tones). | 2009-06-25 |
20090161782 | Characterizing channel response based on composite gain determination - Characterizing channel response based on composite gain determination. Based on tracked amplitude modulation (e.g., which may be hum modulation), compensation for amplitude modulation is applied across all orthogonal signal components of a non-time based orthogonal coded signal. Some examples of such non-time based orthogonal coded signals include an orthogonal frequency division multiplexing (OFDM) signal, a synchronous code division multiple access (S-CDMA) signal, or a code division multiple access (CDMA) signal, etc. The compensation may be applied to the signal across multiple frames, on a frame by frame basis, or intra-frame (i.e., changing and compensating differently within a frame). This compensation for amplitude modulation may be applied in conjunction with adaptive equalization in which different filter taps are applied to each respective orthogonal signal component of the signal. Also, automatic gain control (AGC) may be performed (e.g., before digital sampling) of a received signal in conjunction with the amplitude modulation compensation. | 2009-06-25 |
20090161783 | PER STREAM RATE CONTROL (PSRC) FOR IMPROVING SYSEM EFFICIENCY IN OFDM-MIMO COMMUNICATION SYSTEMS - A method and apparatus for separating a user-data stream into a plurality of sub-streams. The apparatus determines channel conditions for each of a plurality of sub-carriers. Next, a plurality of sub-carriers are modulated and encoded with the sub-stream data according to the selected modulation schemes and coding rates. The modulated sub-carriers are each allocated to one or more transmit antennas for transmission. The adaptive modulation and coding function, the sub-carrier allocation function, and the power control function are jointly controlled to optimize throughput, signal quality, and system efficiency. | 2009-06-25 |
20090161784 | TRANSMIT POWER ALLOCATION FOR ADAPTIVE MULTI-CARRIER MULTIPLEXING MIMO SYSTEMS - The present invention relates to transmit power allocation in multi-carrier, multiplexing MIMO communication systems. The present invention especially relates to a MIMO communication device, a method of assigning transmit power to two or more communication channels and a software program product. A multiple-input-multiple-output, MIMO, communication device according to the present invention comprises | 2009-06-25 |
20090161785 | ASK MODULATOR - An ASK modulator for reducing the difference in the On/Off ratio due to the difference in the envelope frequency components without deteriorating an adjacent wave leakage power is disclosed. The ASK modulator includes a Manchester encoder that generates Manchester-encoded signals by applying Manchester encoding to an input signal sequence, a waveform shaping unit that generates band-limited encoded signals from the Manchester-encoded signals, and detects and limits minimum values of waveforms of the band-limited encoded signals to generates shaped signals, and a modulating unit that modulates carrier waves based on the shaped signals. | 2009-06-25 |
20090161786 | DIGITAL RADIO COMMUNICATIONS METHOD USING MULTI-LEVEL MODULATION SCHEME AND TRANSMITTER AND RECEIVER - A transmitter for use in digital radio communications systems includes: a bit corrector controls bit arrangement in such a manner that a code having high significance, out of multiple codes obtained by coding, is allocated with high priority to a bit having a tendency that the likelihood enlarges at the time of symbol decision on a receiver; a multi-level modulator allocates the code to the multiple bits in accordance with a predetermined symbol arrangement; and a symbol arrangement controller controls the symbol arrangement from equal distance arrangement to another arrangement in accordance with a ratio of the codes different in significance. To control symbol arrangement increases the effect of bit correction and improves an error rate on the receiver. | 2009-06-25 |
20090161787 | ONE-WAY BUFFERED COMMUNICATOR - A system and method of one-way buffered communication for reporting emergency or alarm situation where there is little or no time to wait for a telephone connection to be established. The buffered communication apparatus including apparatus for storing sound input and apparatus for establishing a connection between the communication apparatus and a predetermined party. Once the communication apparatus is activated, both sound storage and call establishment is started and the stored data is transmitted once the connection is established. | 2009-06-25 |
20090161788 | Method for Receiving Frames of a Digital Stream - A receiving method for a digital stream, the stream including frames having each a body composed of a variable number c of symbols and preceded by a header including d symbols, a field composed of a fixed number e of symbols unknown to the receiver and defining the number c. A locking phase of the receiving method includes receiving a series of e symbols of the stream;
| 2009-06-25 |
20090161789 | RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD - Disclosed are a radio sending device and a radio sending method for improving a throughput while keeping a receiving quality. In this radio sending device, an MCS switching control unit ( | 2009-06-25 |