Search - qc ldpc

[MiddleWare] MadHG

Description: 利用函数MadHG生成规则LDPC码的校验矩阵H，其行重为6,列重为3,行数为列数一半(行数越大越好)，H中任意两列没有围长为4的圈，并得到H对应的生成矩阵G，可以保证mod(G*H ,2)=0。使用方法为:[H,G] = MadHG(m,n,x),x= 1(得到的G左半部分为单位阵) or 2(G右半部分为单位阵),-use function MadHG Generation rules LDPC check matrix H, re-6, series of three, out for a few half of the number (A bigger the better), H 2 arbitrary no girth of the four circles, H counterparts and with the formation of matrix G, we can be assured of mod (G* H, 2) = 0. To be used : [H, G] = MadHG (m, n, x), x = 1 (the G part of the Left Front units) or 2 (G right half of the units RUF),
Platform: | Size: 1024 | Author: 心海 | Hits:

[Communication-Mobile] ldpc

Description: ldpc源代码（matlab编写）,也有C语言，涉及LDPC码编码解码程序。-LDPC source code (matlab prepared), there are C language, involves decoding LDPC coding procedures.
Platform: | Size: 15360 | Author: michael | Hits:

[matlab] ldpc_code

Description: qc—ldpc编码的matlab源码，分为好几个版本，small文件夹里的支持小的稀疏矩阵，large文件夹里的支持较大的稀疏矩阵。test文件为顶层-qc-ldpc the matlab source code is divided into several versions, small folder in the support of a small sparse matrix, large folder in the support of a larger sparse matrix. test document for the top-level
Platform: | Size: 69632 | Author: 孙彦 | Hits:

[Program doc] Efficient_Encoding_for_QCLDPC

Description: LDPC已经成为现在很流行的FEC码，这是一篇讲述QC-LDPC编码的经典论文，作者是IEEE终身会员林舒，对目前常用的QC-LDPC编码作了详尽的描述-LDPC has become very popular now FEC code, this is a QC-LDPC code on a classic paper, the author is IEEE Life Member LIN Shu, on the current commonly used QC-LDPC coding detailed description of
Platform: | Size: 251904 | Author: 中国 | Hits:

[Communication-Mobile] ConstructQCLDPCgirth4

Description: Construct the short length of QC LDPC codes without girth 4 and girth 6
Platform: | Size: 1024 | Author: 古立峰 | Hits:

[Communication-Mobile] Girth-twelveQC-LDPC

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).
Platform: | Size: 2048 | Author: 古立峰 | Hits:

[Communication-Mobile] constructsgirth-sixQC-LDPC

Description: constructs girth-six column-weight three QC-LDPC codes
Platform: | Size: 1024 | Author: 古立峰 | Hits:

[Windows Develop] Girth-8QCL-PDC

Description: The program contructs column-weight three girth-eight QC-LPDC codes given row-weight and sub-matrix size. row-weights and sub-matrices sizes are variable
Platform: | Size: 2048 | Author: 古立峰 | Hits:

[Communication-Mobile] PEG_LDPC

Description: 引入PEG（Progressive-edge-growth）算法来构造适合线性时间编码的LDPC校验矩阵，译码时采用简化最小和Min-Sum译码算法实现简化译码．仿真结果表明，该方法能够构造适合LDPC码的线性时间编码的下三角校验矩阵日，并且用此方法构造的LDPC码性能非常接近原来PEG算法构造的LDPC码．同时通过采用最小和Min-Sum算法降低译码复杂度．-The introduction of PEG (Progressive-edge-growth) algorithm to construct suitable for linear time encoding of LDPC check matrix, decoding simplified when the smallest and the Min-Sum decoding algorithm decoding simplified. Simulation results show that this method can construct LDPC codes suitable for linear time encoding on lower triangular calibration matrix, and constructed using this method the performance of LDPC code is very close to the original PEG algorithm constructed LDPC codes. At the same time through the use of the smallest and the Min-Sum decoding algorithm to reduce complexity.
Platform: | Size: 168960 | Author: 卡卡 | Hits:

[3G develop] girth6_shifter

Description: Flexible construction of girth-six QC-LDPC Codes-The program constructs girth-six QC-LDPC codes given row-weight,k, column-weight,j, and sub-matrix size,m. The obtained parity-check matrix is stored in H. The construction has flexibility in that j,k and m can be varied.The program achieves girth-six by applying the row-column constraint. There are m rows in j submatrices. No two rows should share the same column more than once. This constraint is applied to avoid 4-cycles. The construction has flexibility in that j,k and m can be varied.
Platform: | Size: 2048 | Author: lydia | Hits:

[3G develop] QC_codes

Description: Construct the short length of QC LDPC codes without girth 4 and girth 6-The Program to construct the short length of QC LDPC codes without girth 4 and girth 6 Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn. This program presents an approach [1] for constructing the short length of LDPC codes with girth 8. First, we design 3 submatrices with different shifting functions given by our schemes, then combine them into a matrix according to our approach, finally, expand the matrix into a desired parity-check matrix using identity matrices and cyclic shift matrices of the identity matrices. The simulation results in AWGN channels show that the codes which can be obtained by the generator matrix derived from this check matrix for encoding the random information bits are as good as random LDPC codes [1]. Ref: [1] J. Fan, Y. Xiao, “A design of LDPC codes with large girth based on the sub-matrix shifting”, IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006), (CP525), p.
Platform: | Size: 2048 | Author: lydia | Hits:

[source in ebook] QC_codes

Description: QC-LDPC的编译码算法，能够实现对QC-LDPC的SER的仿真-The QC-LDPC codec algorithm for QC-LDPC can achieve the SER simulation
Platform: | Size: 2048 | Author: 李志 | Hits:

[Algorithm] shift_choosing

Description: 这个程序是用来为QC-LDPC 的parity check matrix 选择 shift values的. 其中 0 matrix 的shift value为-1.-this program is used to assign the shift values for parity-check matrix of the QC-LDPC codes. The shift value of the zero matrix is-1.
Platform: | Size: 2048 | Author: Jiangxueqin | Hits:

[matlab] makeH

Description: 通过一个循环方阵A来构造准循环LDPC码的校验矩阵H-make H in QC-ldpc
Platform: | Size: 1024 | Author: 绝版唱片 | Hits:

[Other] imppaper

Description: layered decoding used for QC LDPC Decoder. it consists of check node,bitnode, memory, LLR value generation, minimum finder
Platform: | Size: 270336 | Author: Paramesh | Hits:

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