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7397411 Method, apparatus, system, and program for code conversion transmission and code conversion reception of audio data  
A system and a method of suppressing outstanding degradation of decoded audio quality due to a transmission error of audio coded data are provided without feedback information from a receiver,...
7395492 Method and apparatus for detecting a packet error in a wireless communications system with minimum overhead using tail bits in turbo code  
The need for separate CRC bits is eliminated by taking advantage of what has been determined to be an embedded error detection capability of the tail bits generated by the constituent encoders of a...
7392463 Data reproducing apparatus avoiding selection of incorrect path  
An apparatus for reproducing data includes a branch metric computation unit and a plurality of parallel computation units. Each parallel computation unit includes path metric computation units that...
7388924 Method and apparatus for equalization and decoding in a wireless communications system including plural receiver antennae  
A baseband processor comprising a demodulator that generates channel state information and a maximum ratio combining (MRC) symbol from a received symbol, wherein the received symbol includes...
7386068 Decoder and receiver  
According to an aspect of the present invention, there is provided a decoder for decoding a demodulated signal that has been subjected to a CDM demodulation, the decoder comprising a Viterbi...
7386063 Voting block for identifying WLAN signal modulation type  
A WLAN device operating in an 802.11g mode can receive signals of different modulations. A technique is provided that quickly and accurately identifies signals of different modulation types when...
7383489 Method and apparatus for detecting viterbi decoder errors due to quasi-catastrophic sequences  
A Viterbi decoder that identifies errors in a full decision output comprises a full decision generator that generates the full decision output. An error detector detects errors in the full decision...
7383488 Method and apparatus for detecting Viterbi decoder errors due to quasi-catastrophic sequences  
A Viterbi decoder that identifies errors in an early decision output comprises an early decision generator that generates the early decision output. An error detector detects errors in the early...
7382831 Viterbi decoder utilizing compressed survival metrics for reduced memory size requirements  
A Viterbi decoder is configured for subtracting each survivor metric for each corresponding encoder state by a prescribed subtraction operator based on a prescribed event. The subtraction of each...
7380199 Method and apparatus for precomputation and pipelined selection of branch metrics in a reduced-state Viterbi detector  
A method and apparatus are disclosed for improving the maximum data rate of reduced-state Viterbi detectors with local feedback. The maximum data rate that may be achieved by the disclosed...
7376882 Adaptable channel compensation for reliable communication over fading communication links  
A method for reducing fading channel signal data loss for serial data rates up to approximately 10 gigabits per second includes sequentially distributing serial data to multiple encoders....
7376196 Receiving apparatus in communication system  
In a receiving apparatus in a multicarrier communication system for transmitting data independently via a plurality of subchannels, (1) a soft-decision target value lnD 0 is calculated, this being...
7376195 Digital communication systems having decreased memory  
Methods and apparatus that do not require a memory between the combiner and decision boundary estimator in a digital communications receiver and that enjoy unaltered performance are described. The...
7372922 RSSE optimization using hardware acceleration  
A Reduced State Sequence Equalizer (RSSE) is implemented using a butterfly hardware accelerator ( 58 ) in the form of a butterfly to increase the efficiency of computing branch metrics ( 24 ) and...
7372921 Apparatus and method for channel encoding/decoding in a communication system  
An apparatus and method for channel encoding/decoding are provided which vary an iterative decoding number according to service type, data class and channel condition. A message information...
7370266 Digital signal decoding device and digital signal decoding method  
A digital signal decoding device according to an aspect of the present invention is a digital signal decoding device for generating a binary code sequence by maximum likelihood estimation from a...
7370265 Bandwidth efficient coded modulation scheme based on MLC (multi-level code) signals having multiple maps  
Bandwidth efficient coded modulation scheme based on MLC (Multi-Level Code) signals having multiple maps. The use of multiple maps is adapted to various types of coded signals including multi-level...
7369615 Soft demodulation method and apparatus  
A soft demodulation method and apparatus including calculating partial sums for a unit of each predetermined number of bits of a codeword received from a channel; calculating a value of each entry...
7366246 Method to maximize receiver performance in a multi-stream system  
A receiver includes a channel decoder select circuit, a plurality of communication channels, at least one maximum ratio combiner circuit, and a forward error correction circuit. The plurality of...
7360147 Second stage SOVA detector  
A second stage SOVA detector comprises a dynamic state reordering block with inputs that receive absolute state domain data from a first stage SOVA detector. The second stage SOVA detector provides...
7359464 Trellis decoder and method of decoding  
A trellis traceback apparatus and method are disclosed. In one aspect, the apparatus may include a branch indication memory, memory address logic, a selector, and a shift register. The memory may...
7359446 Methods and devices for decoding signals containing noise and distortion  
“Reliability-related” values are assigned to received signal samples containing noise and distortion. The samples are then sent to a Viterbi decoder in order to regenerate originally...
7356097 Apparatus and method for detecting binary data  
A method and apparatus detecting binary data, the apparatus includes an analog-to-digital (AD) converter converting the input analog signal into a digital signal; at least one binarization unit...
7349495 Soft bits normalization apparatus, method, and system  
A receiver estimates a channel parameter from a received signal. The channel parameter may a DC signal level, a carrier to interference ratio, a noise spectrum, or the like. The receiver performs...
7349478 Ultra-wideband communication apparatus and methods  
Apparatus and methods of ultra-wideband (UWB) communication are provided. In one embodiment, an ultra-wideband transmitter includes a processor configured to generate data for transmission in the...
7349467 Data demodulation apparatus and method  
The invention provides a data decoding apparatus and method by which the data rate can be discriminated at a high speed using a Viterbi decoding process. Receive data are successively Viterbi...
7346836 E2PR4 viterbi detector and method for adding a branch metric to the path metric of the surviving path while selecting the surviving path  
An E 2 PR4 Viterbi detector receives a signal that represents a sequence of values, the sequence having a potential state. The detector includes a recovery circuit that recovers the sequence from...
7346117 Turbo decoder  
A turbo decoder is disclosed that receives a demodulated input signal before a hard decision, including blocks each of multiple data units, and outputs a decoded signal block by block. The turbo...
7340003 Multi-mode iterative detector  
A storage system for storing data on a storage medium includes an encoder, a linear block encoder, a write circuit, a read circuit, a channel decoder, and a soft linear block code decoder. In a...
7340002 Pragmatic trellis code modulation decoder and a method thereof  
A pragmatic trellis code modulation decoder including a demodulator for receiving a modulated signal and computing coordination values of symbols of the modulated signal on an I-axis and Q-axis in...
7339500 Encoding method and decoding method  
The present invention allows two different block codes to be encoded by one-type of encoding section. A first-point-fixed encoding section divides m-bit data into a first-half code and a...
7336735 Viterbi decoder  
Viterbi decoder for decoding a received sequence of data symbols which are coded using a predetermined coding instruction is provided. The Viterbi decoder includes a branch metric calculation...
7336715 Method for coded modulation taking account of the error sensitivity of the user data and encrypting said data after coding  
A method of coded modulation of digital data is described, the digital data being divided into parallel signal streams, and the useful bits then being channel coded at different code rates...
7333572 Viterbi equalization using a table memory for provision of reconstructed signal values for the calculation of transition metrics  
In a method for equalization of a data signal based on the Viterbi algorithm, trellis contributions are first of all calculated for reconstructed signal values from transition metrics, and are...
7333419 Method to improve performance and reduce complexity of turbo decoder  
One aspect of the invention relates to a method and embodiment for decoding a sequence of frames in a communication system having a predetermined decoding time constraint per frame. The first frame...
7327796 SOVA turbo decoder with decreased normalisation complexity  
To obtain best performance from a turbo decoder using a SOVA algorithm a normalization unit is used. By using normalization, the complexity of the decoder is increased. To decrease the complexity...
7327714 Apparatus and method for detecting a time division multiplexing frame in a mobile communication system  
An apparatus and a method are provided for improving reception reliability for control channels by detecting time division multiple (TDM) frames transmitted through the control channels in a TDM...
7324472 Transmission method  
A transmission method is provided whereby data of different classes are transmitted and different reliability positions exist, with the bits of the different classes being mapped to respective...
7321632 Method and apparatus for multi-algorithm detection  
Embodiments of the present invention provide a method, apparatus and system for detecting a transmitted signal according to a detection algorithm selected from two or more detection algorithms...
7319726 Soft-output decoding method and apparatus for controlled intersymbol interference channels  
A method of reducing complexity in a Viterbi decoding algorithm used in intersymbol interference channels is provided. The method includes the steps of identifying a survivor path for an input...
7317762 Third generation FDD modem interleaver  
A method and apparatus are disclosed for deinterleaving expanded interleaved data blocks, particularly for use in a wireless telecommunications system such as provided by the Third Generation...
7317761 Multi-carrier communication system and receiver thereof  
The present invention is a multi-carrier communication system for transmitting/receiving signals via at least four sub-channels, comprising: a transmitter for transmitting data independently via...
7313191 Receiver device of communication system  
Two correlation signals which are obtained by computing correlations between two reference signals and a reception signal are inputted to a level- 0 cell, the reference signals being generated on...
7308640 Low-latency architectures for high-throughput Viterbi decoders  
Digital circuits and methods for designing digital circuits are presented. More particularly, the present invention relates to error correction circuits and methods in communications and other...
7305055 Search-efficient MIMO trellis decoder  
A decoder generates distance and label metrics associated with each label of a coset transmitted in a multi-input multi-output communication system having M t transmit antennas and M r receive...
7302008 Apparatus and method for efficiently distributing energy over a packet data channel in a mobile communication system for high rate packet transmission  
An apparatus and method for efficiently distributing energy to a packet data channel. A turbo encoder generates a sequence of systematic symbols and a sequence of parity symbols by encoding an...
7298798 Method and system for decoding block codes  
A method and system are disclosed for decoding block codes using a single decoder and trellis diagram. The signal can include at least one block code, and the block code can be modulated using at...
7295622 System and method for information decoding using batched processing of independent parameters  
System and method for decoding received information using batched processing of independent parameters. A preferred embodiment comprises a decoder (for example, decoder 210 ) with a memory (for...
7293225 Method and arrangement for decoding using a trellis  
A method and arrangement for performing Viterbi decoding by means of a trellis is provided. According to one embodiment, the arrangement comprises one or more ACS units. Connections between the...
7292658 Method and device for efficient decoding of symbols transmitted in a MIMO telecommunication system  
A method for decoding at least one signal transmitted by means of at least one antenna and received by means of at least one antenna, which method includes a symbol decoding step for producing at...
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