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LDPC码是Low Density Parity-check Codes的缩写，一个长为N的LDPC码由它的校验矩阵H来定义，该矩阵的特点是其中的元素0特别多，1特别少——即所谓的“低密度”。一个参数为（N，i，j）的H表示该矩阵中每列有i个1，每行有j个1，矩阵大小为N×K，N代表码字长度，K代表校验子的个数。
-LDPC code is the ab. of Low Density Parity-check Codes. A Length N LDPC is defined by its
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dmb-th标准中关于LDPC中稀疏矩阵及校验矩阵的源代码，附有校验矩阵-dmb-th standard in on the LDPC check matrix sparse matrix and the source code, with parity matrix
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LDPC码即低密度奇偶校验码（Low Density Parity Check Code，LDPC），这是LDPC仿真中稀疏矩阵生成程序，我花了好几天的时间搞懂，并做了注释。
-LDPC codes that low-density parity check codes (Low Density Parity Check Code, LDPC), which is generated sparse matrix LDPC simulation program, I spent a few
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用于LDPC编码译码的仿真实现。包括随机生成校验矩阵、由校验矩阵产生生成矩阵、编码、加随机噪声、译码等内容。-For LDPC codec simulation. Including randomly generated check matrix, generated by the parity check matrix generator matrix, coding, plus random noise, such as decoding.
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The zip file contains
1. A 128x256 Regular (3,6) H matrix (if you need to simulate other codes, need to write your own code for generating those parity check matrices). The file 128x256regular_v6.mat is for those using Matlab 6.5.
2. Files for
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This matlab code can be used to generate a parity check matrix for the LDPC code and further encoded and decoded in a complete communication system.
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中国数字地面电视标准中的LDPC码校验矩阵转换为Neal的pchk格式的校验矩阵-China digital terrestrial television standard LDPC code parity check matrix matrix Neal converted to the format of pchk
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在matlab环境下，构造LDPC码的校验矩阵的各种方法，包括Gallager构造法，Mackay构造法，PEG构造法，对以后的编译码算法有很大的帮助。-In the matlab environment, various methods LDPC code parity check matrix structure, including Gallager construction law, Mackay construction law, PEG construction method, af
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ldpc码校验矩阵的生成函数，测试可以使用的文件-Lala code file generation function ldpc parity check matrix, the test may be used
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File is used for counting short cycle of ldpc codes. You must give parity check matrix of ldpc code in text file and then use cycle count file of matlab for counting of short cycle of given length.
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LDPC码校验矩阵的生成，可在c++上运行-Generating LDPC code check matrix, can be run on c++
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根据行重、列重，构造低密度奇偶校验码（LDPC码）的校验矩阵。-According to the line weight, the column weight is constructed LDPC (LDPC code) parity check matrix.
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