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| Number | Title | Issue Date |
| 8184750 | Techniques for increasing decoding reliability in an adaptive minimum mean squared error with successive interference cancellation (MMSE/SIC) decoder A technique for increasing decoding reliability in an adaptive minimum mean squared error with successive interference cancellation (MMSE/SIC) decoder in a channel-coded multiple-input multiple-output (MIMO) communication system. A code block selector evaluates reli... | 05/22/2012 |
| 8175196 | Channel equalizer and method of processing broadcast signal in receiving system A channel equalizer includes an overlap unit, an estimator, a calculator, a compensator, and a save unit. The overlap unit overlaps a group of data packets in a broadcast signal. The group data packets include a head, a body, and a tail, and a known data sequence is... | 05/08/2012 |
| 8170155 | Method and apparatus for channel quality measurements A method and apparatus are provided for measuring channel quality over which has been transmitted a sequence of symbols produced by encoding and constellation mapping a source data element sequence. The method includes receiving a sequence of received symbols over t... | 05/01/2012 |
| 8160181 | Nonlinear detectors for channels with signal-dependent noise A non-linear detector for detecting signals with signal-dependent noise is disclosed. The detector may choose a data sequence that maximizes the conditional probability of detecting the channel data. Since the channel may be time-varying and the precise channel char... | 04/17/2012 |
| 8160183 | Receiver spatial processing for eigenmode transmission in a MIMO system For eigenmode transmission with minimum mean square error (MMSE) receiver spatial processing, a transmitter performs spatial processing on NS data symbol streams with steering vectors to transmit the streams on NS spatial channels of a MIMO channel. The steering vec... | 04/17/2012 |
| 8160182 | Symbol detector and sphere decoding method A symbol detector with a sphere decoding method implemented therein. A baseband signal is received to determine a maximum likelihood solution using the sphere decoding algorithm. A QR decomposer performs a QR decomposition process on a channel response matrix to gen... | 04/17/2012 |
| 8155247 | Message decoding with a priori information and soft combining A method and arrangement for improving channel decoding performance in a radio receiver. Data bits from previously decoded messages are analyzed to provide a priori information to a channel decoder which is decoding a currently received message of the same type. The... | 04/10/2012 |
| 8155248 | Equalizing structure and equalizing method An equalizing structure and method for a wireless communication system receiving device, in which two or more transmit signals transmitted in parallel from one or more transmitters are received in received signal vectors representing two or more received data stream... | 04/10/2012 |
| 8155249 | Apparatus of maximum likelihood signal detection An apparatus for maximum likelihood signal detection comprises a reference data unit, a branch metric unit, an add-compare-select unit, a path metric unit and a path memory, and is used for detecting maximum likelihood signal. The reference information unit, the bra... | 04/10/2012 |
| 8155246 | Methods, apparatus, and systems for determining 1T path equivalency information in an nT implementation of a viterbi decoder Methods, apparatus, and systems for generating bit-wise path equivalency information corresponding to 1T decision nodes in a soft output Viterbi algorithm (“SOVA”) decoder operating with an nT clock signal. An add, compare, select circuit (ACS) of the SOVA gener... | 04/10/2012 |
| 8135095 | Enhanced VSB viterbi decoder An enhanced VSB receiver includes a tuner which tunes an RF signal and converts it into an IF signal, an IF mixer which converts the IF signal into a baseband signal, and a demodulator which demodulates the baseband signal into a VSB signal. The enhanced VSB receive... | 03/13/2012 |
| 8130877 | Apparatus and method for detecting signal in multi-antenna system A method and an apparatus for detecting a signal in a multi-antenna system using a spatial multiplexing are provided. The apparatus includes at least one antenna for receiving a signal, a channel estimator for estimating a channel using the received signal, a detect... | 03/06/2012 |
| 8121224 | Systems and methods for filter based media defect detection Various embodiments of the present invention provide systems and methods for media defect detection. For example, a data receiving system is disclosed that includes a data signal provided from a medium that may include a defective portion. An absolute value circuit ... | 02/21/2012 |
| 8121226 | Method of evaluating a readout signal, and optical disc apparatus A method and optical disc apparatus for evaluating a quality of a read signal adapted to the PRML method by evaluating a binary code decoded from the read signal obtained by a head, in which an error bit sequence having one bit edge shift from the binary code is gen... | 02/21/2012 |
| 8121225 | Estimating the angle of arrival of a signal received by an array of commutated antenna elements The angle of arrival is estimated for a received signal received by an array of commutated antenna elements, wherein there is a temporal boundary at the instant of commutation between antenna elements. Samples of the signal received by the elements of the array are ... | 02/21/2012 |
| 8121227 | Reception device It is possible to demodulate a plurality of modulated signals transmitted from a plurality of antennas by using a comparatively small-size circuit with a preferable error ratio characteristic. Partial bit judgment units (509, 512) demodulates partial bits of ... | 02/21/2012 |
| 8116411 | Method to detect data transmitted from multiple antennas and system thereof A method to detect data transmitted from multiple antennas, said method comprising steps of: selecting a starting data block and calling it as previous data block; defining a set of indices of bits to be checked for possible flip in the previous data block as a chec... | 02/14/2012 |
| 8116410 | Communication signal decoding and soft demapping methods and systems Symbol detection and soft dempapping methods and systems are provided. Individual subset symbol detection according to an embodiment of the invention involves identifying a search subset of a transmission symbol set for a transmission symbol. For each other transmis... | 02/14/2012 |
| 8107562 | Combining soft decisions in a weather band radio According to one aspect of the present invention, an apparatus is provided to enable weather band radio signals to be received and processed using a digital signal processor (DSP). The DSP can include functionality to implement both frequency modulation (FM) demodul... | 01/31/2012 |
| 8107563 | Receiving apparatus and method for MIMO system Provided are a receiving apparatus for a multiple input multiple output (MIMO) system and a method thereof. The receiving apparatus includes a QR decomposing unit for calculating a single (Q) matrix vector and an upper triangle (R) matrix vector for a receiving sign... | 01/31/2012 |
| 8098774 | Methods and apparatus for providing a ML decoding pipeline for QPSK MIMO OFDM receivers Methods and apparatus are provided for performing LLR value computations in a pipeline. Portions of a metric used to compute LLR values are computed in one pipeline part. The portions correspond to all permutations of some received signal streams. The portions are c... | 01/17/2012 |
| 8098773 | Communication method and apparatus A communication system (30) includes a transmitter (32) which generates transmit phase points (54) defined to be the vector sum of two or more QPSK signals (76, 78). Forward error correction encoding (48) is performed independently... | 01/17/2012 |
| 8098775 | Data processing apparatus, data processing method and program A data processing apparatus includes: a branch-metric computation section configured to compute a branch metric; a state-metric computation section configured to compute a state metric; a detection section configured to detect a minimum state metric; a storage secti... | 01/17/2012 |
| 8090059 | Multi-viterbi receive channel decoder A detector includes Viterbi detectors. A first Viterbi detector generates a preliminary decision signal. A second Viterbi detector generates a final decision signal based on an input data signal and the preliminary decision signal. The second Viterbi detector is arr... | 01/03/2012 |
| 8090060 | Demodulation technique for GFSK and DPSK A technique for low-complexity high-performance coherent demodulation of GFSK signals involves utilizing a novel phase and frequency tracking mechanism coupled with a trellis search technique to track signal memory in the demodulation process. A method according to ... | 01/03/2012 |
| 8085883 | Method and apparatus for delayed recursion decoder A high-speed maximum likelihood sequence estimation method and device. The method includes identifying candidate paths through a state trellis based on a group of observed data, where each candidate path corresponds to a best path through a trellis beginning at one ... | 12/27/2011 |
| 8081719 | Method and system for improving reception in wired and wireless receivers through redundancy and iterative processing A method and system for improving reception in wired and wireless systems through redundancy and iterative processing are provided. A multilayer decoding process may comprise a burst process and a frame process. Results from a first burst process may be utilized to ... | 12/20/2011 |
| 8077811 | Receiving apparatus For each of a plurality of control channels, a likelihood indicated by a state metric of each state at the last point which is obtained at the time of Viterbi decoding is obtained. This Viterbi decoding is not cut off and performed to convolutionally coded data of t... | 12/13/2011 |
| 8077813 | Apparatus for decoding convolutional codes and associated method A decoding device may include a sequential convolutional code decoder, and a parallel convolutional code decoder. The decoding device may further include a controller for selectively processing a convolutionally encoded input signal via at least one of the sequentia... | 12/13/2011 |
| 8077809 | Link adaptation based on generic CINR measurement according to log-likelihood ratio distribution Techniques are provided to compute the carrier to interference-plus-noise ratio (CINR) in a wireless communication system using log-likelihood ratio (LLR) data generated from a received transmission. The LLR data are collected as they are sent from a detector to a f... | 12/13/2011 |
| 8077810 | Apparatus for high data throughput reception in a WLAN An apparatus for high data throughput reception in a WLAN includes a receiving module, first and second determining modules, a generating module, and a producing module. The receiving module receives a symbol vector representing M streams of symbols transmitted via ... | 12/13/2011 |
| 8077812 | Reduced-complexity multiple-input, multiple-output detection A wireless receiver detects signals generated with a multiple-input, multiple-output (MIMO) transmitter. The receiver applies maximum-likelihood detection (MLD) for soft-output signal detection, where an MLD exhaustive search across all candidate vectors is performe... | 12/13/2011 |
| 8073083 | Sliding block traceback decoding of block codes Sliding block traceback decoding of block codes. Block by block basis decoding is performed in which a single block, and its corresponding overlap portion, are processed during a given time. The traceback saves a record of decision (e.g., among possible trellis bran... | 12/06/2011 |
| 8068566 | Unified multi-mode receiver detector In general, in one aspect, the disclosure describes a unified simplified maximum likelihood detector to be utilized with multiple input multiple output (MIMO) receivers to estimate transmitted signals. The unified detector includes a common framework capable of bein... | 11/29/2011 |
| 8064548 | Adaptive MaxLogMAP-type receiver structures A method and apparatus is disclosed herein for adaptive MaclogMAP-type receiver structures. In one embodiment, a device comprises a receiver to receive information-bearing signals from the transmitter wirelessly transmitted using OFDM and bit interleaved coded modul... | 11/22/2011 |
| 8064549 | Joint demodulation using a Viterbi equalizer having an adaptive total number of states Systems and methods for performing joint demodulation using a Viterbi equalizer having an adaptive total number of states are disclosed. Generally, a method includes joint demodulating a desired signal and none or more interfering signals with a Viterbi equalizer ha... | 11/22/2011 |
| 8059764 | Systems and methods for low-complexity max-log MIMO detection Embodiments provide novel systems and methods for multiple-input multiple-output (MIMO) Max-Log detection. These systems and methods enable near-optimal performance with low complexity for a two-input two-output channel. Some embodiments comprise using a Max-Log det... | 11/15/2011 |
| 8059763 | Approximate soft-information computation in multi-level modulation signaling schemes Apparatus and methods are provided for calculating soft information in a multi-level modulation scheme using one or more nearest neighbors. The nearest neighbors correspond to signal points in a signal constellation set nearest to the value of a received signal. For... | 11/15/2011 |
| 8050363 | Turbo decoder and method for turbo decoding a double-binary circular recursive systematic convolutional encoded signal A Turbo decoder and method for decoding a double-binary circular recursive systematic convolutional (DBCRSC) encoded signal with unknown initial and final states executes iterations of forward and backward recursion on a payload block of the DBCRSC encoded signal an... | 11/01/2011 |
| 8045651 | Method and system for redundancy-based decoding in 8-PSK GSM systems Aspects of a method and system for redundancy-based decoding in 8-PSK GSM systems are provided. A burst process may utilize a gradient search equalization operation to process a received 8-PSK modulated symbol sequence. A frame process may generate a redundancy-base... | 10/25/2011 |
