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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: LDPC研究者MacKay提供的校验矩阵H和对应的G，其中H的行重12，列重6，行数504，列数1008，任意两行不含围长为4的圈-LDPC researchers MacKay, the calibration matrix corresponding to the H and G, in which the re-H 12, series 6, a few 504, cited 1008, the two firms were non-arbitrary girth to the ring 4
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Size: 61418 |
Author: 心海 |
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Description: A collection of LDPC(Low-Density Parity-Codes) tools. Including: Code construction Density Evolution Decoding Algorithm Girth average Counter Stopping set and error Floor,etc
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Size: 3208 |
Author: 武博 |
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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: 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: 1024 |
Author: 心海 |
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Description: LDPC研究者MacKay提供的校验矩阵H和对应的G，其中H的行重12，列重6，行数504，列数1008，任意两行不含围长为4的圈-LDPC researchers MacKay, the calibration matrix corresponding to the H and G, in which the re-H 12, series 6, a few 504, cited 1008, the two firms were non-arbitrary girth to the ring 4
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Size: 61440 |
Author: 心海 |
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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 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: 从这个程序我们可以知道围长为4的H矩阵的误码率。是一个关于LDPC码的程序- We need to know that Girth 4 of H will lead to a poor BER performance. The program can test whether
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Size: 2048 |
Author: 王婷 |
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Description: 检查LDPC 的围长是否超过4, Matlab code-LDPC Girth-4 test, Matlab code
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Size: 8192 |
Author: linzhujun |
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Description: 提出了一种码率码长灵活变化的准循环低密度奇偶校验(Quasi - Cyclic Low Density
Parity Check, QC - LDPC)码,利用构造出的H 矩阵可以达到较大的圈长( girth)值,并能在
girth值不变的前提下实现码率码长的灵活变化-Puts forward a bit rate code length of flexible change must circulation Low Density parity (Quasi-Cyclic Low Density
Parity Check, QC-LDPC code), using the matrix can be constructed to larger H circle long (girth) value, and could be there
The premise of girth values achieve bit rate yards long flexible changes
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Size: 356352 |
Author: 孟君 |
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Description: 1）编写一个Java应用程序，
1）该程序中有3个类：Triangle、Circle和cone，分别用来刻画“三角形”、“圆形”和“圆锥体”。具体要求如下：
a) Triangle类具有类型为double的三个边长度以及周长属性；定义构造函数，返回周长和修改三个边的方法。另外，Triangle类还具有一个boolean型的属性，该属性用来判断三个属能否构成一个三角形。
b) Circle类具有类型为double的属性半径、周长和面积；定义设置半径，返回面积的方法。
c) Cone类具有Circle类型的底，double类型的高这两个属性，定义构造函数，计算圆锥体体积的方法。
-1) write a Java application,
1) The program has three categories: Triangle, Circle and cone, were used to characterize the "triangle", "circle" and "cone." Specific requirements are as follows:
a) Triangle class has three types of double edge length and girth property define a constructor, returns three sides of the perimeter and modification methods. In addition, Triangle class also has a boolean type attribute, which is used to determine whether the three form a triangle.
b) Circle class with properties of type double the radius, circumference and area definitions set the radius, the method returns the area.
c) Cone Circle class has a bottom type, double type high these two properties, the definition of a constructor, method of calculating the volume of a cone.
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Size: 2048 |
Author: 倪林 |
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Description: the matlab program checks for cycles that are of the legnth 4.it is a useful program to check if the cycles in your LDPC code are to short thus causing BER errors
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Size: 5120 |
Author: ingatze |
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Description: 系统地阐述了低密度校验码基于图模型的编译码思想，介绍了密度进化理论，对影响低密度校验码纠错性能的两个主要因素——度序列设计和围长设计进行了深入分析，详细介绍并设计了LDPC的编解码-Systematic exposition of the LDPC graph model based codecs idea, introduces the density evolution theory, the two main factors that affect the performance of LDPC error correction- the degree of sequence design and girth design depth analysis, detailed and designed LDPC codec
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Size: 935936 |
Author: 天空若水 |
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Description: 【matlab国外编程代做】构造围长8列重4的准循环的LDPC码的MATLAB源码-MATLAB code generation [do] matlab programming overseas construction girth 8 weighs 4 quasi-cyclic LDPC codes can be used as a reference study
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Size: 121856 |
Author: 刘洋 |
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Description: Construction of One-Coincidence Sequence Quasi-Cyclic LDPC Codes of Large Girth
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Size: 1086464 |
Author: 陆鑫 |
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