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Description: 用PEG方法生成的围长符合输入要求的规则ldpc码的源程序C语言版。-PEG Generation of Girth accordance with the importation requirements of the source code ldpc C language version.
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Size: 1511 |
Author: 尹浩 |
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Description: gen_H:利用随机pi矩阵排列而成的LDPC稀疏校验矩阵产生；
girthlenth：计算产生的矩阵H的围长-gen_H : pi using random matrix arranged at the LDPC have sparse matrix calibration; girthlenth : calculation of the matrix H Girth
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Size: 2804 |
Author: 喻小星 |
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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),
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Size: 4757 |
Author: 心海 |
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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),
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Size: 1179 |
Author: 心海 |
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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: 2177 |
Author: 心海 |
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Description: 用PEG方法生成的围长符合输入要求的规则ldpc码的源程序C语言版。-PEG Generation of Girth accordance with the importation requirements of the source code ldpc C language version.
Platform: |
Size: 1024 |
Author: 尹浩 |
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Description: gen_H:利用随机pi矩阵排列而成的LDPC稀疏校验矩阵产生；
girthlenth：计算产生的矩阵H的围长-gen_H : pi using random matrix arranged at the LDPC have sparse matrix calibration; girthlenth : calculation of the matrix H Girth
Platform: |
Size: 2048 |
Author: 喻小星 |
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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),
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Size: 4096 |
Author: 心海 |
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Description: 这个程序主要是计算图形的面积先将图像转化为二值图像然后计算图像的面积
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Size: 236544 |
Author: wxf |
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Description: 已知LDPC码的稀疏交验矩阵H，计算girth和local girth-LDPC codes are known to produce for examination sparse matrix H, the calculation girth and local girth
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Size: 1546240 |
Author: Sam |
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Description: Construct the short length of QC LDPC codes without girth 4 and girth 6
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Size: 1024 |
Author: 古立峰 |
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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: constructs girth-six column-weight three QC-LDPC codes
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Size: 1024 |
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: 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
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Size: 2048 |
Author: 古立峰 |
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Description: The program can count the number of the girth 4 of LDPC codes.
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Size: 2048 |
Author: andy |
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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.
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Size: 2048 |
Author: lydia |
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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.
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Size: 2048 |
Author: lydia |
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Description: matlab实现的LDPC编码Tanner图中环的统计算法-matlab achieve Tanner graph of LDPC coding in Central Statistical Algorithm
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Size: 3072 |
Author: 杨友福 |
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Description: 本程序是用来查找LDPC parity-check matrix中的cycle的. 以次可以方便知道girth 的情况.-This program is used to find all the cycles in the parity-check matrix of the LDPC codes. By using this program we can also know the girth condition of our codes.
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Size: 1024 |
Author: Jiangxueqin |
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