公开(公告)号：US20080005641A1

公开(公告)日：2008-01-03

申请号：US11723336

申请日：2007-03-19

申请人： Hironori Uchikawa ,  Kohsuke Harada

发明人： Hironori Uchikawa ,  Kohsuke Harada

IPC分类号： H03M13/00

CPC分类号： H03M13/114 ,  H03M13/616 ,  H03M13/6362

摘要： A decoder is configured to include an acquisition-unit configured to acquire first respective likelihoods of data-bits and second respective likelihoods of parity-bits, the data-bits and the parity-bits included in code data obtained by LDPC-encoding the data-bits with a low density parity check matrix, a detecting-unit configured to detect reliabilities of the first respective likelihoods and the second respective likelihoods, a forming-unit configured to form an update schedule representing an order of updating the first and second respective likelihoods in order of increasing reliability, in accordance with the reliabilities, an updating-unit configured to update the first and second respective likelihoods in the order represented by the update schedule, with the low density parity check matrix, a discriminating-unit configured to execute hard decision of the likelihoods updated by the updating-unit, and a checking-unit configured to execute parity check of a discrimination result of the discriminating-unit, to obtain the code data.

摘要翻译： 解码器被配置为包括：获取单元，被配置为获取奇偶校验比特的第一各自的似然性和奇偶校验比特的第二相应似然性，数据比特和奇偶校验比特包括在通过LDPC编码获得的代码数据中， 具有低密度奇偶校验矩阵的比特，检测单元，被配置为检测第一各个似然性和第二各自似然性的可靠性;形成单元，被配置为形成表示更新第一和第二各自可能性的顺序的更新计划， 根据可靠性增加的顺序，更新单元被配置为利用低密度奇偶校验矩阵以由更新调度表示的顺序更新第一和第二各自的可能性;鉴别单元，被配置为执行硬判决 由更新单元更新的可能性;以及检查单元，被配置为执行对判别结果o的奇偶校验 f鉴别单元，以获得代码数据。

公开(公告)号：US20060023667A1

公开(公告)日：2006-02-02

申请号：US11187853

申请日：2005-07-25

申请人： Yasuhiko Tanabe ,  Daisuke Takeda ,  Tsuguhide Aoki ,  Kohsuke Harada

发明人： Yasuhiko Tanabe ,  Daisuke Takeda ,  Tsuguhide Aoki ,  Kohsuke Harada

IPC分类号： H04Q7/00

CPC分类号： H04B7/04

摘要： A wireless transmission device which communicates with a wireless reception device is provided with a transmission-signal-generating unit configured to generate, transmission signals having transmission rates arranged in order corresponding to an input order of data items of the information sequence. The transmission device is also provided with a preamble adder which adds, to the transmission signals, respective preamble signals assigned in order of the transmission rates and used for estimation of channel responses at the wireless reception device. The transmission device is further provided with transmission units configured to transmit the transmission signals with the preamble signals added thereto.

公开(公告)号：US08291304B2

公开(公告)日：2012-10-16

申请号：US13088957

申请日：2011-04-18

申请人： Kenji Yoshida ,  Haruka Obata ,  Kohsuke Harada

发明人： Kenji Yoshida ,  Haruka Obata ,  Kohsuke Harada

IPC分类号： H03M13/03

CPC分类号： G11B20/10009 ,  G11B20/10055 ,  G11B20/10296 ,  G11B20/10509 ,  G11B2220/2516 ,  H03M13/2957 ,  H03M13/3905 ,  H03M13/4138 ,  H03M13/6306 ,  H03M13/6343

摘要： According to one embodiment, a signal processing device comprises a first waveform equalizer, a second waveform equalizer, a first Viterbi decoder, a second Viterbi decoder. The first and the second waveform equalizers equalize a waveform of the input signal according to first and second partial response characteristics and output first and second partial response signals. The first and second Viterbi decoders decode the first and the second partial response signals by means of Viterbi decoding process. The input signal is reproduced based on an output of the first Viterbi decoder and an output of the second Viterbi decoder.

摘要翻译： 根据一个实施例，信号处理装置包括第一波形均衡器，第二波形均衡器，第一维特比解码器，第二维特比译码器。 第一和第二波形均衡器根据第一和第二部分响应特性对输入信号的波形进行均衡，并输出第一和第二部分响应信号。 第一和第二维特比解码器通过维特比解码处理解码第一和第二部分响应信号。 基于第一维特比解码器的输出和第二维特比解码器的输出再现输入信号。

公开(公告)号：US20090100312A1

公开(公告)日：2009-04-16

申请号：US12233673

申请日：2008-09-19

申请人： Hironori UCHIKAWA ,  Kohsuke Harada

发明人： Hironori UCHIKAWA ,  Kohsuke Harada

IPC分类号： H03M13/05 ,  G06F11/07

CPC分类号： H03M13/114 ,  H03M13/112 ,  H03M13/3738 ,  H03M13/658 ,  H03M13/6583

摘要： There is provided with a decoding apparatus for decoding a low-density parity check code defined by a parity check matrix, includes: a first operation unit configured to carry out a row operation for each row of the parity check matrix; a calculation unit configured to calculate a reliability coefficient with respect to establishment of a parity check equation defined by said each row, respectively; a second operation unit configured to carry out a column operation for said each row; and a controller configured to iteratively execute one set which includes respective processing by the first operation unit, the calculation unit and the second operation unit and omit the processing by the first operation unit and the calculation unit for a row for which the reliability coefficient has satisfied a threshold.

摘要翻译： 提供了一种用于解码由奇偶校验矩阵定义的低密度奇偶校验码的解码装置，包括：第一操作单元，被配置为对奇偶校验矩阵的每一行执行行操作; 计算单元，被配置为分别计算关于由所述每行定义的奇偶校验方程的建立的可靠性系数; 第二操作单元，被配置为对所述每行执行列操作; 以及控制器，被配置为迭代地执行包括由所述第一操作单元，所述计算单元和所述第二操作单元进行的各自处理的一组，并且省略由所述第一操作单元和所述计算单元对于所述可靠性系数满足的行的处理 一个门槛。

公开(公告)号：US20070033513A1

公开(公告)日：2007-02-08

申请号：US11390354

申请日：2006-03-28

申请人： Kohsuke Harada ,  Kaoru Inoue

发明人： Kohsuke Harada ,  Kaoru Inoue

IPC分类号： G06F11/00 ,  H03M13/00

CPC分类号： H04L1/007 ,  H03M13/2903 ,  H03M13/296 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0065

摘要： Radio-communication-system includes transmitting-station and receiving-station. The transmitting-station includes first-encoding-unit configured to generate plural parity-information by using the different-data, second-encoding-unit configured to encode each of the plural parity-information and each of the different-data to produce plural encoded-data, modulation-unit configured to modulate carriers by the plural encoded-data to generate plural modulated-signals, and multiplex-unit configured to multiplex the plural modulated-signals for outputting a multiplexed-signal. The receiving-station includes demultiplex-unit configured to demultiplex the multiplexed-signal transmitted from the transmitting-station into the plural modulated-signals, demodulation-unit configured to demodulate each of the modulated-signals demultiplexed by the demultiplex-unit to produce plural demodulated-signals, first-decoding-unit configured to decode each of the demodulated-signals according to a decoding-scheme corresponding to an encoding-scheme of the second-encoding-unit to produce plural decoded-signals, and second-decoding-unit configured to decode each of the decoded-signals according to a decoding-scheme corresponding to an encoding-scheme of the first-encoding-unit to obtain the different-data.

摘要翻译： 无线电通信系统包括发射台和接收站。 发送站包括：第一编码单元，被配置为通过使用不同数据的第二编码单元来生成多个奇偶校验信息，第二编码单元被配置为对多个奇偶校验信息和每个不同数据进行编码，以产生多个编码单元 数据，调制单元，被配置为通过多个编码数据调制载波以产生多个调制信号;以及多路复用单元，被配置为复用用于输出复用信号的多个调制信号。 所述接收站包括解复用单元，被配置为将从所述发送站发送的复用信号解复用为多个调制信号;解调单元，被配置为解调由解复用单元解复用的每个调制信号，以产生多个解调 信号，第一解码单元，被配置为根据与所述第二编码单元的编码方案相对应的解码方案来解码每个解调信号，以产生多个解码信号;以及第二解码单元配置 根据与第一编码单元的编码方案相对应的解码方案来解码每个解码信号，以获得不同的数据。

公开(公告)号：US20060222121A1

公开(公告)日：2006-10-05

申请号：US11385835

申请日：2006-03-22

申请人： Hironori Uchikawa ,  Kohsuke Harada

发明人： Hironori Uchikawa ,  Kohsuke Harada

IPC分类号： H04L1/02

CPC分类号： H04L1/005 ,  H04L1/0057

摘要： A receiving-apparatus which includes space-filtering-unit configured to separate receive-signals into signal of first-data-sequence and signal of second-data-sequence on basis of estimation result, provisional-decoding-unit configured to LDPC-decode the two corresponding signals, to obtain provisional-likelihood-ratio for the two sequences, provisional-output-unit configured to output two provisional corresponding sequences on the basis of the respective provisional-likelihood-ratio, replica-signal-generation-unit, estimation-result of propagation-path-estimation-unit, soft-decision-outputting-unit configured to obtain receive-likelihood-values of the two sequences, on basis of residual-signal obtained by subtracting replica-signal from receive-signals, actual-decoding-unit configured to LDPC-decode receive-likelihood-values, to obtain likelihood-ratio of the two sequences, and actual-output-unit configured to obtain the two sequences on the basis of likelihood-ratio of the two sequences to hard-decision.

摘要翻译： 一种接收装置，包括：空间滤波单元，被配置为基于估计结果将接收信号分离为第一数据序列的信号和第二数据序列的信号;临时解码单元，被配置为对 两个对应的信号，以获得两个序列的临时似然比，临时输出单元，被配置为基于相应的临时似然比，复制信号生成单元，估计 - 传播路径估计单元的结果，软判定输出单元，被配置为基于通过从接收信号中减去副本信号而获得的残差信号来获得两个序列的接收似然值，实际解码 - 单位，被配置为LDPC解码接收似然值，以获得两个序列的似然比，以及被配置为基于两个序列的似然比来获得两个序列的实际输出单元 以硬决定。

公开(公告)号：US20060181717A1

公开(公告)日：2006-08-17

申请号：US11357588

申请日：2006-02-17

申请人： Kohsuke Harada ,  Michiyuki Suzuki

发明人： Kohsuke Harada ,  Michiyuki Suzuki

IPC分类号： G06K15/00

CPC分类号： G06F3/1284 ,  G06F3/1211

摘要： In an image forming apparatus, at the time of print recording of a set of image data to a plurality of recording sheets, by the use of a recording sheet interval that is an interval between a position where print recording of a recording sheet of the plurality of recording sheets ends and a position where print recording of a succeeding recording sheet starts, an image processing portion executes image processing of another set of image data read by a scanner portion and divided by an image dividing portion, in accordance with an operation command of a control portion.

公开(公告)号：US20050268204A1

公开(公告)日：2005-12-01

申请号：US11138999

申请日：2005-05-27

申请人： Kohsuke Harada

发明人： Kohsuke Harada

IPC分类号： H03M13/19 ,  H03M13/00 ,  H03M13/03 ,  H03M13/09 ,  H03M13/11 ,  H03M13/25 ,  H03M13/29 ,  H04L1/20

CPC分类号： H03M13/114 ,  H03M13/1111 ,  H03M13/255 ,  H03M13/3723 ,  H03M13/658

摘要： A detecting unit detects an input signal and acquires likelihood values of respective binary data items included in the data. On the basis of reliabilities of the likelihood values of the respective binary data items acquired by the detecting unit, a scheduling unit draws up an operation schedule to execute an LDPC operation using the likelihood values of higher reliabilities with priority. On the basis of the operation schedule, an LDPC decoding unit executes decoding by executing the LDPC operation using the likelihood values acquired by the detecting unit.

摘要翻译： 检测单元检测输入信号并获取数据中包括的各个二进制数据项的似然值。 基于由检测单元获取的各个二进制数据项的似然值的可靠性，调度单元使用优先级更高可靠性的似然值来执行操作调度以执行LDPC操作。 基于操作时间表，LDPC解码单元通过使用由检测单元获取的似然值执行LDPC操作来执行解码。

公开(公告)号：US20050265472A1

公开(公告)日：2005-12-01

申请号：US11135298

申请日：2005-05-24

申请人： Daisuke Takeda ,  Yoshimasa Egashira ,  Tsuguhide Aoki ,  Yasuhiko Tanabe ,  Kohsuke Harada ,  Hironori Uchikawa

发明人： Daisuke Takeda ,  Yoshimasa Egashira ,  Tsuguhide Aoki ,  Yasuhiko Tanabe ,  Kohsuke Harada ,  Hironori Uchikawa

IPC分类号： H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L25/02 ,  H04L27/26 ,  H04L1/02

CPC分类号： H04B7/04 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226

摘要： Before data is transmitted from a plurality of antennas, a plurality of known symbol sequences are transmitted from these antennas. Each known symbol sequence contains a plurality of known symbols having different subcarrier arrangements. Known symbols transmitted from different antennas have different subcarrier arrangements.

摘要翻译： 在从多个天线发送数据之前，从这些天线发送多个已知符号序列。 每个已知符号序列包含具有不同副载波布置的多个已知符号。 从不同天线发送的已知符号具有不同的子载波布置。

公开(公告)号：US07729071B2

公开(公告)日：2010-06-01

申请号：US11896211

申请日：2007-08-30

申请人： Kohsuke Harada

发明人： Kohsuke Harada

IPC分类号： G11B5/09

CPC分类号： H03M13/3905 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10296 ,  G11B20/10314 ,  G11B20/10481 ,  G11B20/1833 ,  G11B2220/2516 ,  H03M13/1102 ,  H03M13/2957 ,  H03M13/41 ,  H03M13/4146 ,  H03M13/6331

摘要： A readback apparatus (a) calculates a variance value of a signal read by a head from a disc medium, (b) estimates a degree of offtracking of the head from a target track to an adjacent track, and interference power from the adjacent track using the variance value of the signal, (c) calculates a soft decision likelihood value for the signal using the degree of offtracking and the interference power, and (d) performs error correcting decoding using the soft decision likelihood value.

摘要翻译： 回读装置（a）计算由盘介质读取的信号的方差值，（b）估计头部从目标轨道到相邻轨道的后掠程度，以及来自相邻轨道的干扰功率，使用 信号的方差值，（c）使用跟踪程度和干扰功率计算信号的软判决似然值，（d）使用软判决似然值进行纠错解码。