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    • 81. 发明申请
    • RADIO COMMUNICATION DEVICE AND REPETITION METHOD
    • 无线电通信设备和重传方法
    • US20100325520A1
    • 2010-12-23
    • US12526415
    • 2008-02-08
    • Kenichi KuriAkihiko NishioKatsuhiko Hiramatsu
    • Kenichi KuriAkihiko NishioKatsuhiko Hiramatsu
    • H03M13/05G06F11/10
    • H03M13/1102H03M13/6356
    • Provided is a radio communication device which can obtain the maximum improvement effect of the error rate characteristic by repletion when an LDPC code is used as an error correction code. In this device, an LDPC encoding unit (101) performs LDPC encoding on a transmission bit string by using an inspection matrix so as to obtain an LDPC code word formed by a systematic bit and a parity bit and output it to a repletion unit (102) and output the inspection matrix to the repetition unit (102). The repetition unit (102) performs repetition in the ascending order of the column weight of the inspection matrix in the LDPC code word and if a plurality of bits have the same column weight, in the ascending order of the column weight of the inspection matrix of the check node connected to a variable node corresponding to the bit.
    • 提供一种无线电通信装置,当使用LDPC码作为纠错码时,可以通过补偿获得错误率特性的最大改进效果。 在该装置中,LDPC编码单元(101)通过使用检查矩阵对发送比特串进行LDPC编码,以获得由系统比特和奇偶校验位形成的LDPC码字,并将其输出到补充单元(102 )并将检查矩阵输出到重复单元(102)。 重复单元(102)按照LDPC码字中的检查矩阵的列权重的升序执行重复,并且如果多个位具有相同的列权重,则按照检查矩阵的列权重的升序 该校验节点连接到与该比特对应的变量节点。
    • 82. 发明授权
    • OFDM communication apparatus and OFDM communication method
    • OFDM通信装置和OFDM通信方法
    • US07856064B2
    • 2010-12-21
    • US11722827
    • 2005-12-26
    • Kenichi MiyoshiAkihiko NishioIsamu Yoshii
    • Kenichi MiyoshiAkihiko NishioIsamu Yoshii
    • H04K1/10
    • H04L5/006H04L1/0066H04L1/0086H04L1/08H04L5/0007H04L5/0046
    • An OFDM communication apparatus that can set an optimum repetition number to data to be transmitted, thereby improving the error rate characteristic and hence the communication quality. In this apparatus, a repetition number deciding part (153) decides, based on quality information outputted from a quality information extracting part (152), a required repetition number. A systematic bit repetition number deciding part (154) decides, based on the repetition number notified of by the repetition number deciding part (153), an optimum repetition number for the systematic bit. A parity bit repetition number deciding part (155) operates similarly. Repetition parts (103-1, 103-2) repeat the bits in accordance with instructions from the systematic bit repetition number deciding part (154) and from the parity bit repetition number deciding part (155).
    • 一种OFDM通信装置,其可以将要发送的数据设置为最佳重复数,从而提高错误率特性,从而提高通信质量。 在该装置中,重复次数判定部(153)根据从质量信息提取部(152)输出的质量信息,决定所需重复次数。 系统比特重复数决定部(154)根据重复数决定部(153)通知的重复次数,决定系统比特的最佳重复次数。 奇偶校验位重复数决定部(155)的动作类似。 重复部分(103-1,103-2-2)根据来自系统位重复数决定部分(154)的指令和奇偶校验位重复次数确定部分(155)重复这些位。
    • 84. 发明申请
    • RADIO COMMUNICATION APPARATUS AND PUNCTURING METHOD
    • 无线电通信设备和接收方法
    • US20100275090A1
    • 2010-10-28
    • US12747492
    • 2007-12-14
    • Kenichi KuriAkihiko NishioKatsuhiko HiramatsuMasaru FukuokaHao Jiang
    • Kenichi KuriAkihiko NishioKatsuhiko HiramatsuMasaru FukuokaHao Jiang
    • H03M13/13G06F11/10
    • H03M13/1185H03M13/353H03M13/6362
    • A radio communication apparatus is provided that enables degradation of error rate performance due to puncturing to be minimized when an LDPC code is used as an error correcting code. In this apparatus, a padding bit insertion section 101 inserts padding bits in a transmission bit sequence based on a parity check matrix, and outputs the generated bit sequence to an LDPC encoding section 102. Using the parity check matrix, LDPC encoding section 102 performs LDPC encoding on the bit sequence input from padding bit insertion section 101, and obtains an LDPC codeword composed of systematic bits and parity bits. Then a puncturing section 103 eliminates padding bits from the LDPC codeword input from. LDPC encoding section 102, and also punctures parity bits in the LDPC codeword in order starting from a parity bit corresponding to a variable node for which the total number of connections to padding bits via check nodes is larger.
    • 提供了一种无线电通信装置,当使用LDPC码作为纠错码时,可以使由于打孔造成的错误率性能的劣化最小化。 在该装置中,填补比特插入部101基于奇偶校验矩阵将填充比特插入到传输比特序列中,并将生成的比特序列输出到LDPC编码部102.使用奇偶校验矩阵,LDPC编码部102进行LDPC 对从填补比特插入部分101输入的比特序列进行编码,并获得由系统比特和奇偶校验比特组成的LDPC码字。 然后,删截部分103从输入的LDPC码字中消除填充比特。 LDPC编码部分102,并且还从针对与通过校验节点的填充比特的总数量的更大的可变节点相对应的奇偶校验位开始顺序地对LDPC码字中的奇偶校验位进行穿孔。
    • 87. 发明申请
    • Wireless Communication Device and Retransmission Judging Method
    • 无线通信设备和重传判断方法
    • US20100195571A1
    • 2010-08-05
    • US12671191
    • 2008-07-30
    • Kenichi KuriAkihiko Nishio
    • Kenichi KuriAkihiko Nishio
    • H04W40/00H03M13/05G06F11/10
    • H03M13/1102H03M13/6306H04L1/0054H04L1/0057H04L1/1829
    • It is an object to provide a wireless communication device configured to reduce a communication resource necessary for retransmission, so that data transmission efficiency can be improved. In this device, when an NACK signal is input from an error detecting unit (107), i.e., when receiving data have an error, a retransmission judging unit (109) carries out retransmission judgment processing to judge for every block whether or not block retransmission is required on the basis of an average value of an LLR of each decoding bit included in each block in a plurality of blocks comprised of the divisions of decoding bit sequences input from an LDPC decoding unit (106) in accordance with the magnitude of row weights. Further, the retransmission judging unit (109) judges the plurality of the blocks in order of larger magnitude of the row weights, so that, at the timing of such judgment that the retransmission of some block is required, the retransmission judging unit does not carry out the judgment of the block which has not been judged as to whether or not the retransmission is required. A control signal generating unit (110) generates feedback information based on the judged result input from the retransmission judging unit (109).
    • 本发明的目的是提供一种被配置为减少重发所需的通信资源的无线通信装置,从而能够提高数据传输效率。 在该装置中,当从错误检测单元(107)输入NACK信号时,即,当接收到数据有错误时,重发判定单元(109)执行重传判断处理,以判断每个块是否是块重传 是根据包括在由LDPC解码单元(106)输入的解码位序列的分割组成的多个块中的每个块中包括的每个解码位的LLR的平均值,根据行权重的大小而需要的 。 此外,重传判定单元(109)按照行权重的较大幅度的顺序判断多个块,从而在需要进行某个块的重发的判断的定时,重发判定单元不携带 排除尚未被判断为是否需要重传的块的判断。 控制信号生成部(110)根据从重发判定部(109)输入的判定结果生成反馈信息。