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    • 3. 发明申请
    • CRC generator polynomial select method, CRC coding method and CRC coding circuit
    • CRC生成多项式选择方法,CRC编码方法和CRC编码电路
    • US20080320370A1
    • 2008-12-25
    • US11821561
    • 2007-06-22
    • Masashi ShinagawaKeitarou KondouMakoto Noda
    • Masashi ShinagawaKeitarou KondouMakoto Noda
    • H03M13/00
    • H03M13/09H03M13/6508
    • Disclosed herein is a CRC generator polynomial select method for selecting a generator polynomial to be used in CRC coding processing and/or CRC processing of inspecting a CRC processing result, the CRC generator polynomial select method may include a first process of finding largest minimum Hamming distances Max.dmin; a second process of finding code lengths n for each of the largest minimum Hamming distances Max.dmin and determining a range expressed by relations nmin (r, Max.dmin)≦n≦nmax (r, Max.dmin); a third process of searching all generator polynomials G(x) for specific generator polynomials G(x); and a fourth process of selecting final generator polynomials G(x) each having a smallest term count w and a lowest code undetected-error probability Pud from the specific generator polynomials G(x).
    • 本发明公开了一种CRC生成多项式选择方法,用于选择在CRC编码处理中使用的生成多项式和/或检查CRC处理结果的CRC处理,CRC生成多项式选择方法可以包括找到最大最小汉明距离的第一处理 Max.dmin; 对于最大最小汉明距离Max.dmin中的每一个找到码长度n的第二过程,并且确定由关系nmin(r,Max.dmin)表示的范围,其中,nmin(r,Max.dmin); 搜索特定生成多项式G(x)的所有生成多项式G(x)的第三处理; 以及从特定生成多项式G(x)中选择最终生成多项式G(x)的第四处理,每个最终生成多项式G(x)具有最小项数w和最低代码未检测错误概率Pud。
    • 5. 发明授权
    • CRC generator polynomial select method, CRC coding method and CRC coding circuit
    • CRC生成多项式选择方法,CRC编码方法和CRC编码电路
    • US08341510B2
    • 2012-12-25
    • US11821561
    • 2007-06-22
    • Masashi ShinagawaKeitarou KondouMakoto Noda
    • Masashi ShinagawaKeitarou KondouMakoto Noda
    • H03M13/09
    • H03M13/09H03M13/6508
    • Disclosed herein is a CRC generator polynomial select method for selecting a generator polynomial to be used in CRC coding and code checking, the method may include a first process of finding largest minimum Hamming distances Max.dmin of codes generated from given polynomials; a second process of finding code lengths n for codes having the largest minimum Hamming distances Max.dmin and determining a range nmin (r, Max.dmin)≦n≦nmax (r, Max.dmin); a third process of searching all polynomials for specific polynomials generating codes having dmin=Max.dmin in the determined range; and a fourth process of selecting final generator polynomials having a smallest non-zero coefficient count and a lowest code undetected-error probability from the specific polynomials.
    • 本发明公开了一种CRC生成多项式选择方法,用于选择要用于CRC编码和代码检查的生成多项式,该方法可以包括找到从给定多项式生成的代码的最大最小汉明距离Max.dmin的第一处理; 确定最小最小汉明距离Max.dmin的码的码长n的第二过程,并确定范围nmin(r,Max.dmin)≦̸ n≦̸ nmax(r,Max.dmin); 在确定的范围内搜索具有dmin = Max.dmin的代码的特定多项式的所有多项式的第三处理; 以及从特定多项式中选择具有最小非零系数计数和最低代码未检测错误概率的最终生成多项式的第四处理。
    • 6. 发明申请
    • DECODING APPARATUS
    • 解码设备
    • US20080270868A1
    • 2008-10-30
    • US12100730
    • 2008-04-10
    • Masashi ShinagawaHiroyuki YamagishiMakoto Noda
    • Masashi ShinagawaHiroyuki YamagishiMakoto Noda
    • H03M13/05G06F11/10
    • H03M13/1137H03M13/1111H03M13/6566
    • In the present application, there is provided a decoding apparatus for decoding low density parity check codes, including: a plurality of storage sections configured to store logarithmic likelihood ratios or logarithmic posteriori probability ratios for one codeword into addresses thereof which are independent of each other thereamong; and a readout section configured to simultaneously read out, from among the logarithmic likelihood ratios or logarithmic posteriori probability ratios for the one codeword stored in the storage sections, a plurality of ones of the logarithmic likelihood ratios or logarithmic posteriori probability ratios which correspond to non-zero value elements in a predetermined one row of the check matrix used in a coding process of the low density parity check codes.
    • 在本申请中,提供了一种用于解码低密度奇偶校验码的解码装置,包括:多个存储部分,被配置为将一个码字的对数似然比或对数后验概率比存储为彼此独立的地址 ; 以及读出部,被配置为从存储在存储部中的一个码字的对数似然比或对数后验概率之中同时读出与非对数似然比对应的多个对数似然比或对数后验概率, 在低密度奇偶校验码的编码处理中使用的校验矩阵的预定一行中的零值元素。
    • 7. 发明授权
    • Decoding apparatus
    • 解码装置
    • US08205130B2
    • 2012-06-19
    • US12100730
    • 2008-04-10
    • Masashi ShinagawaHiroyuki YamagishiMakoto Nada
    • Masashi ShinagawaHiroyuki YamagishiMakoto Nada
    • G06F11/00
    • H03M13/1137H03M13/1111H03M13/6566
    • In the present application, there is provided a decoding apparatus for decoding low density parity check codes, including: a plurality of storage sections configured to store logarithmic likelihood ratios or logarithmic posteriori probability ratios for one codeword into addresses thereof which are independent of each other thereamong; and a readout section configured to simultaneously read out, from among the logarithmic likelihood ratios or logarithmic posteriori probability ratios for the one codeword stored in the storage sections, a plurality of ones of the logarithmic likelihood ratios or logarithmic posteriori probability ratios which correspond to non-zero value elements in a predetermined one row of the check matrix used in a coding process of the low density parity check codes.
    • 在本申请中,提供了一种用于解码低密度奇偶校验码的解码装置,包括:多个存储部分,被配置为将一个码字的对数似然比或对数后验概率比存储为彼此独立的地址 ; 以及读出部,被配置为从存储在存储部中的一个码字的对数似然比或对数后验概率之中同时读出与非对数似然比对应的多个对数似然比或对数后验概率, 在低密度奇偶校验码的编码处理中使用的校验矩阵的预定一行中的零值元素。
    • 9. 发明申请
    • Device and Method for Transmission, Device and Method for Reception, and Program
    • 传输装置和方法,接收和程序的装置和方法
    • US20110029838A1
    • 2011-02-03
    • US12934159
    • 2009-04-02
    • Masashi ShinagawaMakoto Noda
    • Masashi ShinagawaMakoto Noda
    • H03M13/29G06F11/10
    • H04L1/001H03M13/09H03M13/35H04L1/007H04L1/0072
    • The present invention relates to a device and a method for transmission, a device and a method for reception, and a program that make it possible to obtain an undetected error probability characteristic close to a limit value in a system using a CRC for a plurality of pieces of data having different code lengths. A generator polynomial for header data which generator polynomial is used when a CRC coding process is performed on header data and a generator polynomial for sub-header data which generator polynomial is used when the CRC coding process is performed on sub-header data are set in a transmitting device 101. The transmitting device 101 selects a generator polynomial according to data set as an object of the CRC coding process. The generator polynomial for header data is a generator polynomial whose undetected error probability becomes lower when used for data of 176 bits equal to the code length of header data. The generator polynomial for sub-header data is a generator polynomial whose undetected error probability becomes lower when used for data of 656 bits equal to the code length of sub-header data. The present invention is applicable to devices using CRC code.
    • 本发明涉及一种用于发送的装置和方法,一种用于接收的装置和方法,以及一种程序,其使得能够获得在使用CRC的系统中接近极限值的未检测到的误差概率特性 具有不同码长的数据片段。 在对标题数据执行CRC编码处理时使用生成多项式的生成多项式和在对子标题数据执行CRC编码处理时使用生成多项式的子标题数据的生成多项式的生成多项式设置在 发送装置101.发送装置101根据作为CRC编码处理的对象设定的数据来选择生成多项式。 标题数据的生成多项式是当用于等于标题数据的代码长度的176位的数据时,未检测到的错误概率变低的生成多项式。 用于子标题数据的生成多项式是当用于等于子标题数据的代码长度的656位的数据时,未检测到的错误概率变低的生成多项式。 本发明适用于使用CRC码的设备。