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| Number | Title | Issue Date |
| 7096403 | Iterative concatenated code decoding circuit and encoding/decoding system using the same This invention provides an iterative concatenated code decoding circuit that allows a circuit size to be reduced and the error correction capability to be improved. A encoded data received through a transmission path from a first stage inner decoder is decoded, in w... | 08/22/2006 |
| 7096412 | Method for iterative and non-iterative data detection using reduced-state soft-input/soft-output algorithms for complexity reduction In a digital information processing system wherein a model of a finite state machine (FSM) receiving a plurality of FSM inputs and producing a plurality of FSM outputs is represented by a reduced-state trellis and wherein the FSM inputs are defined on a base closed ... | 08/22/2006 |
| 7093188 | Decoding method and apparatus Units of forward error correction (FEC) encoded bits each represent a one-bit data value and include correctness bits that together reflect a probability that the one-bit data value represented by the unit is correct. The units of FEC encoded bits are decoded by usi... | 08/15/2006 |
| 7093170 | Coding apparatus and decoding apparatus for transmission/storage of information An output coding apparatus includes a coder for coding an inputted bitstream to an error correction and/or detection code composed of information bits and check bits; and a bitstream assembling section for assembling an outputted bitstream by inserting a synchroniza... | 08/15/2006 |
| 7088792 | Device and method for efficient decoding with time reversed data A novel device which efficiently decodes data encoded with a cyclic code in communications systems where a convolutional code is applied after the cyclic code during encoding. Specifically, the device accepts data provided in time reversed order by a Viterbi decoder... | 08/08/2006 |
| 7088793 | Equalizer for complex modulations in very noisy environments An equalizer is used with complex modulation modems to reduce intersymbol interference. The equalizer includes an equalizer filter that receives an input data signal and adapts to compensate for the noisy communications channels to reduce intersymbol interference to... | 08/08/2006 |
| 7089483 | Two stage detector having viterbi detector matched to a channel and post processor matched to a channel code A two-stage sampling data detector for a partial response channel having a channel code encoder for encoding user information sequences into blocks of code words in accordance with a predetermined channel block code characterized by a list of most likely error-event... | 08/08/2006 |
| 7089482 | Data reproduction device A data reproduction device in conformity to Viterbi decoding includes an inverted-selected path generation part for receiving a selected path and an inverted candidate, selecting and modifying the selected path corresponding to the inverted candidate so as to produc... | 08/08/2006 |
| 7089481 | High speed arithmetic operations for use in turbo decoders Techniques for performing substantially concurrent add-compare-select-add operations and substantially concurrent compare-select-add operations for use in turbo decoders are provided. In one aspect of the invention, a technique for processing data in accordance with... | 08/08/2006 |
| 7085985 | Close two constituent trellis of a turbo encoder within the interleave block Close two constituent trellis of a turbo encoder within the interleave block. The state of a multi-state encoder is forced to a known/predetermined state at the end and beginning of each data frame. Packet based and/or frame based data transmissions benefit greatly ... | 08/01/2006 |
| 7085992 | Method and device for decoding a sequence of physical signals, reliability detection unit and viterbi decoding unit A method and device for decoding a sequence of physical signals. A Viterbi algorithm is carried out a first time for all physical signals, resulting in a maximum likelihood path, wherein there is one signal value for each physical signal and which has been determine... | 08/01/2006 |
| 7082565 | Method for matching the bit rate in a communication device, and a corresponding communication device In order to match the bit rate in a communication device, the bits of a bit stream are punctured or repeated, in which case for each bit an updated error value is calculated on the basis of a previously determined error value and an update parameter and a judgment i... | 07/25/2006 |
| 7082566 | Signal quality evaluation method, information recording/reproducing system, and recording compensation method Signal quality evaluation is performed using a predetermined reproduction signal, a first pattern corresponding to a signal waveform pattern of the reproduction signal, and a given pattern corresponding to the signal waveform pattern of the reproduction signal and b... | 07/25/2006 |
| 7080312 | Data transformation for explicit transmission of control information The present invention provides a system and method for explicitly transmitting a block attribute in the data of a block. In one embodiment, a current block of data is randomized in accordance with an ID value from the current block and from at least one temporally a... | 07/18/2006 |
| 7080313 | Signal evaluation apparatus and signal evaluation method There is provided a signal evaluation apparatus and signal evaluation method capable of consistently measuring an accurate bit error rate regardless of the distribution profile of the difference of likelihoods (difference metrics) of data sequences. In the signal ev... | 07/18/2006 |
| 7080311 | Convolutional coding and decoding method and system A method of transmitting convolutionally encoded data with separate, independent and looped encoding over at least one data portion. The data is distributed over one or more cycles, and a plurality of cycles can be grouped into packets for discontinuous transmission... | 07/18/2006 |
| 7076006 | Data reproducing method and device reproducing data according to a Viterbi decoding algorithm using an average value of a reproduction signal A data reproducing method reproduces data corresponding to a state-transition pass selected as being most likely according to a Viterbi decoding algorithm from a reproduction signal supplied from a recording medium. The data reproducing method comprises the steps of... | 07/11/2006 |
| 7076720 | Encoding apparatus and decoding apparatus An encoding apparatus includes a first encoding unit adapted to encode inputted data, an interleaving unit adapted to interleave the inputted data, and a second encoding unit adapted to encode an output of the interleaving unit. The encoding apparatus executes a fir... | 07/11/2006 |
| 7076721 | Data recording/readback method and data recording/readback device for the same The present invention discloses an information processing method including the following steps: (1) a first step receiving an encoded information data series as input; (2) a second step selecting a candidate decode... | 07/11/2006 |
| 7065701 | Method for iteratively decoding block turbo codes and recording medium for storing iterative decoding program of block turbo codes A method for iteratively decoding a block turbo code includes: receiving a signal frame formed of a product code obtained by serially concatenating block codes; forming a reliability array for signal demodulation and initializing extrinsic reliability information; p... | 06/20/2006 |
| 7065699 | Using quadrant shifting to facilitate binary arithmetic with two's complement operands Operands (90) that are represented in two's complement format are prepared for use in binary arithmetic. For each operand, it is determined (91, 93) whether an original value thereof is within a predetermined proximity of a maximum positive/maximum neg... | 06/20/2006 |
| 7065698 | Method and apparatus for encoding/decoding reed-solomon code in bit level A method and an apparatus for encoding/decoding RS (Reed-Solomon) code using a binary equivalence method of bit level. The apparatus includes a binary conversion unit for converting non-binary symbols outputted from a source information inputting unit into binary sy... | 06/20/2006 |
| 7065696 | Method and system for providing high-speed forward error correction for multi-stream data A system for providing a high-speed implementation for multi-stream forward error correction (FEC) is provided. According to one exemplary aspect, the system is able to provide block-based multi-stream FEC that reduces the power consumption when compared with conven... | 06/20/2006 |
| 7065027 | Method for recovering data and control chip utilizing the same A method for locating an electric level distribution range of sampled signals is provided. The electric level distribution range includes a plurality of reference levels. Firstly, a plurality of initial values are provided. Then, each of the sampled signals is corre... | 06/20/2006 |
| 7065148 | Super-orthogonal space-time trellis codes, and applications thereof A super set of space-time block codes is combined with set partitioning to form super-orthogonal space-time trellis codes having full diversity, enhanced coding gains, and improved rates. In communications systems, these codes are implemented by an encoder of a dive... | 06/20/2006 |
| 7065695 | Metric calculation design for variable code rate decoding of broadband trellis, TCM, or TTCM Metric calculation design for variable code rate decoding of broadband trellis, TCM (trellis coded modulated), or TTCM (turbo trellis coded modulation). A single design can accommodate a large number of code rates by multiplexing the appropriate paths within the des... | 06/20/2006 |
| 7065161 | Partial response maximum likelihood (PRML) bit detection apparatus Sample values of an input information signal are obtained at sampling instants. For each of a plurality of states at a sampling instant, an optimum path metric value is determined. For each of the plurality of states a best predecessor state at he directly preceding... | 06/20/2006 |
| 7061978 | Compensation method for reducing intersymbol interference products caused by signal transmission via dispersive media In accordance with the presently claimed invention, compensation for reducing ISI products within an electrical data signal corresponding to a detected data signal received via a signal transmission medium introduces distinct compensation effects for individual ISI ... | 06/13/2006 |
| 7062000 | Viterbi decoder In a Viterbi decoder a bit range converter (11) is provided for converting a bit range of the branch metric values calculated by a branch metric calculator (1) to meet the number of calculation bits used in an ACS portion (2). The bit range conv... | 06/13/2006 |
| 7062701 | Method for storing path metrics in a viterbi decoder For a Virerbi decoder, it is proposed to combine the butterfly structures of the corresponding trellis diagram in pairs in such a way that for each butterfly structure pair, the destination states of the two butterfly structures in the trellis diagram at the same ti... | 06/13/2006 |
| 7062407 | Efficient backward recursion for computing posterior probabilities A method and apparatus are provided that reduce the amount of memory needed to perform forward-backward recursion to identify posterior probabilities. Under the invention, a forward recursion is performed to identify forward recursion scores. The forward recursion s... | 06/13/2006 |
| 7058142 | Generation of amplitude levels for a partial response maximum likelihood (PRML) bit detector An apparatus for deriving amplitude values from an input information signal, which amplitude values can he used as reference levels for the states of a finite state machine, which are needed for the computation of the likelihood functional in a partial response maxi... | 06/06/2006 |
| 7058422 | Method for overusing frequencies to permit simultaneous transmission of signals from two or more users on the same frequency and time slot A system is provided for increasing the number of users capable of communicating over a wireless network to permit multiple users to transmit information simultaneously on the same channel or frequency in which a Viterbi decoder-based signal separation system is use... | 06/06/2006 |
| 7058141 | MLSE decoding of PRS type inter-bin interference in receiver-end windowed DMT system An improved method of decoding the Partial-Response Signaling type inter-bin distortion in receiver-end windowed DMT system is disclosed. The method exploits the Maximum Likelihood Sequence Estimation, which yields certain improvements over the conventional DFE-type... | 06/06/2006 |
| 7058086 | Method and apparatus for concatenated convolutional encoding and interleaving A method and apparatus encode a source data stream via convolutional encoding. One or more encoded data streams are interleaved and transmitted on one or more transmission channels. Data groups generated via convolutional encoding are interleaved via time-interleavi... | 06/06/2006 |
| 7058878 | Data processing apparatus using iterative decoding A data signal processing apparatus is capable of reproducing original data with a small number of repetition times of an iterative decoding process, which is realized by likelihood information operating means that generate updated likelihood information, carry out a... | 06/06/2006 |
| 7054392 | Process and device for estimating the successive values of digital symbols, in particular for the equalization of an information transmission channel in mobile telephony A process for estimating successive values of digital symbols which can each take M different possible values, on the basis of the successive values of digital samples each of which results from the combination of at most L successive symbols. This process includes ... | 05/30/2006 |
| 7054288 | Method and apparatus for providing fast detection of a high speed shared control channel A method and apparatus for providing fast detection of a high speed shared control channel (HS-SCCH). The HS-SCCH carries information necessary for receiving data via a high speed downlink shared channel (HS-DSCH). The apparatus receives messages transmitted via a p... | 05/30/2006 |
| 7055088 | Interleaved generalized convolutional encoder Several embodiments of an interleaved generalized convolutional encoder system and method are provided for communicating data over a transmission path in order to inhibit distortion caused by impulse noise or other correlated noise and enhance transmission rate of d... | 05/30/2006 |
| 7055089 | Decoder and decoding method A decoding system and method for providing relatively high likelihood of obtaining at least two paths of getting to each decoding state from at least three paths. The system and method also selects a maximum likelihood path from the two paths, where a log likelihood... | 05/30/2006 |
