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Description: Software for Low Density Parity Check Codes Radford M. Neal Version of 2006-02-08. This collection of programs and modules, written in C, is intended to support research and education concerning Low Density Parity Check (LDPC) codes. (Note, however, that the copyright notice no longer restricts use to these purposes). These codes were invented by Robert Gallager in the early 1960's, and re-invented and shown to have very good performance by David MacKay and myself in the mid-1990's. The decoding algorithm for LDPC codes is related to that used for Turbo codes, and to probabilistic inference methods used in other fields. Variations on LDPC and Turbo codes are currently the best practical codes known, in terms of their ability to transmit data at rates approaching channel capacity with very low error probability.
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Size: 405064 |
Author: netor4you@yahoo.com |
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Description: 一个LDPC的例程使用matlab编写，可直接运行，信道编码程序-a LDPC the use of Matlab routines prepared to be directly run channel coding procedures
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Size: 3072 |
Author: 李文超 |
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Description: 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。原作者是老外，有部分中文注释。-LDPC coding for decoding Simulation. Check including random matrix generated by the calibration matrix generated generator matrix, coding, plus random noise, such as decoding. The original author is a foreigner, some Chinese Notes.
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Size: 58368 |
Author: 别志松 |
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Description: 基于1962年Gallager提出的规则LDPC码构造方法实现的生成相应LDPC校验矩阵的相应matlab程序。只需要输入相应的码长，列重，行重即可得到具体的矩阵。-1962 Gallager based on the rules LDPC new method of generating the corresponding LDPC calibration matrix corresponding Matlab procedures. Only need to import the corresponding code length, the series, can be re-specific matrix.
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Size: 1024 |
Author: kevin |
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Description: 生成一个规则LDPC码的教研矩阵H，其行数(越大越好)为列数的一半，行重为6，列重为3，任意两行没有围长为4的圈
使用方法：H=HGrandom2(m,n)。m表示行数，n表示列数-rules of a generation of research LDPC matrix H, its (larger the better) half of the series, re-6, series of three, two arbitrary line is not girth of the ring used four methods : H = HGrandom2 (m, n). Said a few m, n Columns
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Size: 2048 |
Author: 心海 |
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Description: LDPC码校验矩阵声称函数，可以根据度分布生成相应的校验矩阵，适用于码长很长的LDPC.-LDPC check matrix function claims that can be generated in accordance with the corresponding distribution check matrix, for a very long code length LDPC.
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Size: 2048 |
Author: xingang |
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Description: LDPC中的效验矩阵里面有无4环对译码性能的影响，用MTLAB写的-LDPC matrix of well-tested inside the 4 ring on whether the impact of decoding performance, written by MTLAB
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Size: 2048 |
Author: 钟声 |
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Description: LDPC编解码器程序，包括几个生成矩阵文件-LDPC codec procedures, including a number of documents generated matrix
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Size: 663552 |
Author: 刘明 |
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Description: 本程序是对LDPC校验矩阵的编码matlab源程序，对研究ldpc的人应该会很有帮助的！-This procedure is a check matrix of LDPC code matlab source code for LDPC study should be helpful!
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Size: 7168 |
Author: 李林 |
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Description: LDPC校验矩阵生成、高斯消去法编码、BP译码程序-LDPC check matrix generation, Gaussian elimination coding, BP decoding procedures
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Size: 3072 |
Author: 李枫 |
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Description: The program constructs girth-twelve column-weight QC-LPDC codes. The rate can be changed by changing k(row-weight), size is changed by varying m(sub-matrix size).
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Size: 2048 |
Author: 古立峰 |
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Description: The algorith divides rows in to four equal groups. The rows are then used to from a distance graph which is then transformed into a matrix. girth of eight is maintained by avoiding six-cycles in the graph construction
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Size: 2048 |
Author: 古立峰 |
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Description: ＬＤＰＣ 编码算法 基于LU的校验矩阵编码方法-LDPC coding algorithm based on LU checksum matrix encoding method
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Size: 2048 |
Author: nzh |
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Description: LDPC码编译码源程序，可生成任意非规则二进制校验矩阵，并可进行LLR BP译码-LDPC codec source code can be generated non-arbitrary rules binary check matrix, LLR BP decoding can be carried out
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Size: 7168 |
Author: wwwwomen |
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Description: LDPC码既低密度奇偶校验码（Low Density Parity Check Code，LDPC），它由Robert G.Gallager博士于1963年提出的一类具有稀疏校验矩阵的线性分组码，不仅有逼近Shannon限的良好性能，而且译码复杂度较低, 结构灵活，是近年信道编码领域的研究热点，目前已广泛应用于深空通信、光纤通信、卫星数字视频和音频广播等领域。LDPC码已成为第四代通信系统(4G)
-LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and simplified log-domain SPA decoder.
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Size: 8192 |
Author: 天天 |
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Description: 将wimax结构化表示转为校验矩阵，用于LDPC编码仿真，适用于类似wimax中，结构化LDPC码的设计。-Wimax will be structured to express check matrix for LDPC code simulation, applicable to similar wimax, the structured LDPC code design.
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Size: 228352 |
Author: 郭文演 |
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Description: Low density parity check matrix-Description
A program written for generating LDPC matrix in the as pattern as discussed in the research paper , " Time varying periodic convolutional codes with low density parity check
matrix" by Alberto jiménez Felströ m and Kamil Sh. zigangirov IEEE Transaction on information theory vol 45 no 6 sept 1999. pages 2181-2191
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Size: 2048 |
Author: lydia |
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Description: LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and simplified log-domain SPA decoder.
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Size: 4096 |
Author: Rafal |
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Description: 构造LDPC校验矩阵的程序，包括多种方法来构造校验方程，可以自己修改。 -LDPC check matrix construction process, including a number of ways to construct the calibration equations, it can be changed.
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Size: 415744 |
Author: 牛顿 |
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Description: This program can be used for LDPC matrix generator.
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Size: 1024 |
Author: sivaprakash |
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