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1. 发明申请

US20080168324A1 Basic Matrix Based on Irregular Ldpc, Codec and Generation Method Thereof 有权
标题翻译：基于不规则Ldpc，编解码器及其生成方法的基本矩阵
公开(公告)号：US20080168324A1
公开(公告)日：2008-07-10
申请号：US11795826
申请日：2005-05-13
申请人： Jun Xu , Yuan Liuqing , Hu Liujun
发明人： Jun Xu , Yuan Liuqing , Hu Liujun
IPC分类号： H04M13/00
CPC分类号： H03M13/033 , H03M13/1105 , H03M13/1148 , H03M13/118
摘要： Basic matrix based on irregular LDPC codes, codec and generation method thereof. The codec includes an encoding/decoding operation module and a basic matrix storage module. In the stored basic matrix Hb, for all girths with length of 4, any element of i, j, k or l constituting the girths in anti-clockwise or clockwise always satisfies inequality: mod(i−j+k−l, z)≠0, wherein z is the extension factor. When generating the basic matrix, firstly the number of rows M, number of columns N, and weight vectors of the rows and columns are determined, an irregularly original basic matrix is constructed; then the position of ‘1’ is filled by a value chosen from set {0, 1, 2, . . . , z−1} to obtain the basic matrix Hb, which is made to satisfy the above-mentioned inequality. The basic matrix Hb obtained by storing, which is configured with corresponding encoding/decoding operation module, constitutes the desired encoder/decoder. The encoder/decoder according to the present invention can effectively eliminate error-floor phenomenon of LDPC codes and accelerate the falling speed of BER curve.
摘要翻译：基于不规则LDPC码的基本矩阵，其编解码器及其生成方法。编解码器包括编码/解码操作模块和基本矩阵存储模块。在存储的基本矩阵Hb中，对于长度为4的所有环形，构成围绕逆时针或顺时针的周长的i，j，k或l的任何元素总是满足不等式：mod（i-j + k1，z） 0，其中z是扩展因子。当生成基本矩阵时，首先确定行数M，列数N和行和列的加权向量，构建不规则原始基本矩阵; 那么'1'的位置由从{{0，1，2，...}中选择的值填充。。。，z-1}，以获得满足上述不等式的基本矩阵Hb。由配置有相应的编码/解码操作模块的存储获得的基本矩阵Hb构成所需的编码器/解码器。根据本发明的编码器/解码器可以有效地消除LDPC码的错误现象，加快BER曲线的下降速度。

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