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US20140185657 SYSTEMS AND METHODS FOR IMPLEMENTING SOFT-DECISION REED-SOLOMON DECODING TO IMPROVE CABLE MODEM AND CABLE GATEWAY PERFORMANCE  
A system and method are provided for implementing a soft Reed-Solomon (RS) decoding scheme, technique or algorithm to improve physical layer performance in cable modems and cable gateways. At...
US20120257692 RECEIVER SYSTEM AND METHOD OF OPERATION THEREOF  
A method of operation of a communication system includes: utilizing an estimation module estimating a log-likelihood ratio for a transmission; and utilizing a slicing module, coupled to the...
US20120027126 APPARATUS AND METHOD FOR CONSTELLATION REARRANGEMENT IN BROADBAND WIRELESS ACCESS SYSTEM  
An apparatus and a method for operating a transmitter supporting constellation rearrangement for 256-Quadrature Amplitude Modulation (QAM) in a broadband wireless access system are provided. The...
US20140003546 ADAPTIVE SLICER AND CONSTELLATIONS FOR QAM COMMUNICATIONS  
A method for a QAM receiver to decide a value of a received symbol of an N-point QAM constellation transmission including extracting coordinate values for the received symbol, and using a decision...
US20140211887 APPARATUS AND METHOD FOR SUPPORTING TIME-QUADRATURE AMPLITUDE MODULATION IN A WIRELESS COMMUNICATION SYSTEM  
A method for supporting Time-Quadrature Amplitude Modulation (TQAM) in a wireless communication system includes generating a transmission symbol identified by a combination of a QAM symbol and a...
US20150049844 Method And Apparatus For Improved QAM Constellations  
A method and transmitter and receiver for determining and transmitting or receiving a non-uniform QAM signal comprises selecting a signal to noise ratio for a channel and forward error corrector...
US20130136210 Metric Corrections for Demodulators Using Serial Localization with Indecision  
Demodulation methods and apparatus for a multi-stage SLI demodulator are disclosed. Residual signals from each demodulation stage are modeled as finite sets of unresolved signals and a new metric...
US20140140443 INJECTION-LOCKED RF RECEIVER HAVING TRIFILAR TRANSFORMER SPLITTER  
The present invention relates to an injection-locked RF receiver having trifilar transformer splitter. The injection-locked RF receiver includes a trifilar transformer splitter, an...
US20110051851 DEMODULATION USING SERIAL LOCALIZATION WITH INDECISION  
A receiver includes a constellation processing module and a plurality of demodulation stages. The constellation processing module groups points of a constellation associated with a transmitted...
US20110051852 JOINT DEMODULATION AND INTERFERENCE SUPPRESSION USING SERIAL LOCALIZATION WITH INDECISION  
A receiver includes a constellation processing module and a multi-stage demodulator having a plurality of non-final demodulation stages and a final demodulation stage. The constellation processing...
US20140270000 Computation of Reliability Values  
There are disclosed systems and methods for computing a reliability value for a bit of a received symbol value y associated with a constellation. In one embodiment, the method comprises computing...
US20150124907 Hardware-Efficient Signal-Component Separator For Outphasing Power Amplifiers  
Described herein is a fixed-point piece-wise linear (FP PWL) approximation technique for computations of nonlinear functions. The technique results in circuit designs having relatively few and...
US20120051462 INTEGRATED LOW-IF TERRESTRIAL AUDIO BROADCAST RECEIVER AND ASSOCIATED METHOD  
An integrated low-IF (low intermediate frequency) terrestrial broadcast receiver and associated method are disclosed that provide an advantageous and cost-efficient solution. The integrated...
US20130107989 Process for Performing Log-Likelihood-Ratio Clipping in a Soft-Decision Near-ML Detector, and Detector for Doing the Same  
A process for computing Log-Likelihood-ratios (LLR) in a detector of a wireless communication receiver, said LLR being used by a channel decoder. The process comprises the steps of:—receiving a...
US20100158150 MAX-LOG STACK DECODER  
A method for demodulating signals in a multi-input multi-output (MIMO) receiver includes obtaining a transformed vector by a coordinate transformation of a received observation vector using a...
US20070009063 Method and device for mapping/demapping a tributary signal into/from a synchronous frame  
It is disclosed a mapper for mapping a tributary from a first frame into a second frame. The mapper comprises: a first register for generating a first counter which is adapted to be increased by a...
US20090185640 DEMODULATION CIRCUIT, DIGITAL MICROWAVE SYSTEM AND DEMODULATION METHOD  
A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second...
US20120082268 METHOD FOR DIGITAL WIRELESS COMMUNICATIONS  
In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a...
US20140348267 LOW LATENCY OFDM SYSTEM  
A low latency transmitter and receiver for an OFDM system are disclosed. The low latency transmitter includes an FFT module and a baseband modulator. The FFT module computes IDFT of PSK...
US20130343489 DEMAPPER FOR ROTATED QAM CONSTELLATIONS  
A method includes receiving a symbol modulated with multiple bits according to a signal constellation including multiple constellation points. A soft metric is computed for a given bit in the...
US20110116809 PHASE RECOVERY DEVICE, PHASE COVERY METHOD AND RECEIVER FOR 16 QAM DATA MODULATION  
The present invention relates to a phase recovery device, phase recovery method and receiver for 16 QAM data modulation. The phase recovery device comprises: a fourth power calculator for...
US20080095273 Fast Fourier Transformation (Fft) With Adaption Of The Sampling Rate In Digital Radio Mondiale (Drm) Receivers  
A method of processing received radio signals in a receiver operating according to the DRM standard, in which the signals are converted to the receiver's baseband frequency, sampled and then...
US20100278284 METHOD AND SYSTEM FOR SYMBOL DETECTION USING SUB-CONSTELLATIONS  
Systems and methods for symbol detection using sub-constellations are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to...
US20130010849 WIRELESS TRANSMISSION SYSTEM AND WIRELESS TRANSMITTER, WIRELESS RECEIVER, WIRELESS TRANSMISSION METHOD WIRELESS RECEPTION METHOD AND WIRELESS COMMUNICATION METHOD USED WITH SAME  
A wireless transmission system includes a wireless HDMI transmitter and a wireless HDMI receiver. The wireless HDMI transmitter includes a carrier oscillator provided for each channel of an HDMI...
US20090245392 METHOD AND SYSTEM FOR CONCEALING ERRORS  
A method for concealing errors includes that the transmitting end splits the received compressed video data into slice structures, allocates the adjacent slice structures to non-adjacent OFDM...
US20120076243 METHOD FOR LIMITING INTERFERENCE RECEIVED BY A PLURALITY OF DESTINATIONS  
The present invention concerns a method for limiting interference received by a plurality of destinations, the interference being generated by plural flows of complex modulation symbols...
US20140056341 SYSTEMS/METHODS OF ADAPTIVELY VARYING A BANDWIDTH AND/OR FREQUENCY CONTENT OF COMMUNICATIONS  
A bandwidth that is allocated to a transmitted waveform need not be contiguous in frequency space and a frequency content of the transmitted waveform may vary, as needed, even on a signaling...
US20090141830 RECEIVER AND METHOD FOR RECEIVING WIRELESS SIGNALS  
A receiver and method for receiving wireless signal are characterized in that a multi-branch correcting and switching module (402) is added, which is used for amplitude and phase correction of...
US20100014612 QAM DEMODULATION  
A method of demodulating a signal on which is modulated, using a quadrature amplitude modulation scheme, a plurality of information symbols, the method including: determining at least one QAM...
US20100008289 Method to Minimize Interference into Legacy SDARS Reception by Varying Overlay Modulation as a Function of Satellite Position  
In exemplary embodiments of the present invention, a degree of hierarchical modulation can be varied as a function of satellite position, which can be related to time of day, and where such...
US20130156131 METHOD AND APPARATUS FOR CORRECTING SIGNAL DEPENDENT DUTY CYCLE ERRORS IN AMPLITUDE SHIFT KEYING RECEIVERS  
An apparatus for demodulating an Amplitude Shift Keying (ASK) encoded signal is provided. The apparatus comprises a peak detector, a first comparator, a threshold generator, a delay circuit, and a...
US20120155574 RECEIVER AND METHOD FOR PROCESSING RADIO SIGNALS USING SOFT PILOT SYMBOLS  
A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted...
US20120106611 PHASE LOCKING LOOP  
A phase-locking loop (PLL) for use with orthogonal frequency division multiplexed signals. In one embodiment, a wireless receiver includes a PLL is configured to reduce phase and frequency...
US20090022245 Low latency analog QAM coherent demodulation algorithm  
A digital demodulation method for a quadrature amplitude modulated signal uses a phase locked loop to generate a local carrier signal. The phase locked loop uses a feedback signal derived from one...
US20150098514 Techniques for Generating Bit Log-Likelihood Ratios in Communication Systems Using Differential Modulation  
A technique for generating a bit log-likelihood ratio (LLR) in a communication system includes generating a demodulated signal based on a received symbol and a reference symbol. An input for a bit...
US20110188613 Compact pulse shaping for QM-MSK and PAM/QAM reception  
Compact pulse shape partial response (CPS PR) signaling is developed for trellis based signals like QM-MSK, and for PAM/QAM type signals to improve the performance to bandwidth tradeoff. Compact...
US20110113462 FAILOVER WITH REDUNDANT MULTICASTS FOR SWITCHED DIGITAL VIDEO  
A method and system for delivering content is provided. In one example, responsive to a request by a client device identifying a video program, the system is configured to determine different...
US20090052576 DATA TRANSMISSIONS IN A MOBILE COMMUNICATION SYSTEM EMPLOYING DIVERSITY AND CONSTELLATION REARRANGEMENT OF A 16 QAM SCHEME  
The invention relates to methods for transmitting and receiving a data bit stream in a communication system using 16-QAM constellations. Further, an apparatus for performing the methods is...
US20090252206 DIGITAL TRANSCEIVER  
Digital Transceiver (DTRX) usable in a radio communications systems for transmitting and receiving digital base-band signals, wherein the DTRX (300) comprises: at least one digital up-converter...
US20080075200 Detecting circuit, modulation scheme identifying circuit, integrated circuit, tuning device, and common multi-scheme receiving device  
A plurality of detectors are included which have different detection frequencies. The detectors detect the signal level of an IF signal at the respective detection frequencies. The IF signal is...
US20130182797 AMPLITUDE SHIFT KEYING DEMODULATOR AND METHOD FOR DEMODULATING AN ASK SIGNAL  
An ASK demodulator comprises a rectification circuit which receives and rectifies an ASK signal to generate a rectified current; an active load circuit is coupled to the rectification circuit and...
US20100232546 Relay Link Control Channel Design  
A method for wireless communication is provided. The method comprises transmitting a relay downlink control information (R-DCI) block in a plurality of resource blocks.
US20120128101 METHOD AND APPARATUS FOR ROBUST AND HIGH EFFICIENCY FEC FRAME HEADER RECOVERY  
Methods and apparatus for FEC frame header detection are provided, suitable for use in a DVB-C2 receiver. A first method comprises demodulating with a quadrature phase shift keying (QPSK)...
US20140269992 METHOD AND APPARATUS FOR ENCODING AND DECODING FOR FREQUENCY AND QUADRATURE-AMPLITUDE MODULATION IN WIRELESS COMMUNICATION SYSTEM  
An apparatus and a method for operating a transmission end in a wireless communication system that supports Frequency and Quadrature-Amplitude Modulation (FQAM) are provided. The method includes...
US20090180576 Amplitude modulation decoder  
Embodiments of the present disclosure provide improved techniques for decoding amplitude modulated messages, including those encoded using quadrature amplitude modulation (QAM). For example, a...
US20100208846 RADIO RECEIVING APPARATUS AND RADIO RECEIVING METHOD  
A radio receiving apparatus and a radio receiving method wherein synchronization is established at a high speed with high reliability. An IR receiver (100) includes a synchronization establishing...
US20120027129 DEMODULATION CIRCUIT, DIGITAL MICROWAVE SYSTEM AND DEMODULATION METHOD  
A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second...
US20100086081 MODULATION DEVICE AND DEMODULATION DEVICE  
Provided is a modulation device which generates a phase modulation signal and an amplitude modulation signal and can correct an I/Q orthogonal shift and reduce degradation of the ON/OFF ratio. In...
US20090213964 RADIO DETECTION DEVICE AND METHOD  
A radio detection device includes two or more reception antennas, for detecting a detecting object by a mono-pulse method; the radio detection device including: a variable gain unit for discretely...
US20090110121 Programmable Signal Slicer  
Disclosed are various embodiments of a programmable slicer in a digital signal processing system and/or software radio system. In one embodiment, a plurality of demodulation schemes and a...
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