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 Platform: |
Size: 3208 |
Author:武博 |
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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 Platform: |
Size: 3072 |
Author:武博 |
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Description: LDPC码密度进化程序，加入了自己的一些见解。-the programe of LDPC codes density evolution, with some personal viewpoint. Platform: |
Size: 26624 |
Author:sun rong |
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Description: LDPC的密度演化算法，C++写的，执行速度很快。-LDPC density evolution algorithm, C++ written in the implementation of the fast. Platform: |
Size: 10240 |
Author:李剑 |
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Description: 关于LDPC密度进化理论分析不规则码字阈值，合理优化度分布，构造优异性能的LDPC码。以及高斯近似分析阈值的比较-Analysis of Density Evolution on the irregular LDPC code word threshold, optimize the degree distribution, excellent performance of the LDPC codes constructed. And the Gaussian approximation threshold comparison Platform: |
Size: 210944 |
Author:yxc |
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Description: 关于LDPC密度进化理论分析不规则码字阈值，合理优化度分布，构造优异性能的LDPC码。以及高斯近似分析阈值的比较-Analysis of Density Evolution on the irregular LDPC code word threshold, optimize the degree distribution, excellent performance of the LDPC codes constructed. And the Gaussian approximation threshold comparison Platform: |
Size: 224256 |
Author:yxc |
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Description: 关于LDPC密度进化理论分析不规则码字阈值，合理优化度分布，构造优异性能的LDPC码。以及高斯近似分析阈值的比较-Analysis of Density Evolution on the irregular LDPC code word threshold, optimize the degree distribution, excellent performance of the LDPC codes constructed. And the Gaussian approximation threshold comparison Platform: |
Size: 404480 |
Author:yxc |
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Description: 关于LDPC密度进化理论分析不规则码字阈值，合理优化度分布，构造优异性能的LDPC码。以及高斯近似分析阈值的比较-Analysis of Density Evolution on the irregular LDPC code word threshold, optimize the degree distribution, excellent performance of the LDPC codes constructed. And the Gaussian approximation threshold comparison Platform: |
Size: 450560 |
Author:yxc |
Hits:
Description: 关于LDPC密度进化理论分析不规则码字阈值，合理优化度分布，构造优异性能的LDPC码。以及高斯近似分析阈值的比较-Analysis of Density Evolution on the irregular LDPC code word threshold, optimize the degree distribution, excellent performance of the LDPC codes constructed. And the Gaussian approximation threshold comparison Platform: |
Size: 297984 |
Author:yxc |
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Description: This code provides the density evolution for a regular (3, 6) LDPC code. The code finds the proper threshold for SNR of the sender. Platform: |
Size: 1024 |
Author:homayoon |
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Description: The code provides a noisy belief propagation density evolution algorithm for a (3, 6) LDPC code. Platform: |
Size: 1024 |
Author:homayoon |
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Description: Abstract—Selection combining cascaded with maximum-ratio
combining (SC/MRC), which is particularly useful when site
diversity is available, combined with low-density parity-check
(LDPC) codes is able to combat the effects of fading. The biterror
rate (BER) expressions of uncoded SC/MRC and SC/MRC
with LDPC codes over an independent and identically distributed
Rayleigh-fading channel are derived based on the Gaussian
approximation approach. These expressions are also applicable
to the selection combining and maximum-ratio combining as
special cases. The derived expressions are in good agreement
with simulation results and approach the density evolution (DE)
thresholds. These expressions are able to achieve a significant
reduction in computational time with a reasonable accuracy for
analyzing the BER performance as compared to simulations and
DE.
Platform: |
Size: 99328 |
Author:ppdghius |
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Description: LDPC译码过程的密度进化程序，值得学习参考-density evolution code for ldpc decoding, which is worth reading for the IT workers. Platform: |
Size: 26624 |
Author:陈丹 |
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Description: LDPC-PEG算法构造H矩阵源码程序，matlab源码程序 clear all;
clc;
%输入编码参数,m:校验节点数目，n:变量节点数目(注意码率R不一定为1/2)
%构造任意码率的LDPC校验矩阵
m=input('The number of check nodes:');
n=input('The number of variable nodes:');
h=zeros(m,n);
%给定变量节点度分布序列 dv=0.38354*x+0.04237*x^2+0.57409*x^3
%为了得到更好的性能，此处的度分布序列采用密度进化理论选取
dv=inline('0.38354*x+0.04237*x.^2+0.57409*x.^3','x');
%计算每个度分布的节点数
indv=quadl(dv,0,1);
a2=round(n*(0.38354/2/indv));
a3=round(n*(0.04273/3/indv));
ds(1:a2)=2;
ds(a2+1:a3+a2)=3;(LDPC-PEG algorithm constructs H matrix source code program, matlab source code program clear all;
CLC;
% Input coding parameters, m: number of check nodes, n: number of variable nodes (note that bit rate R is not necessarily 1/2)
% Constructing LDPC Check Matrix with Arbitrary Bit Rate
M = input ('The number of check nodes:');
N = input ('The number of variable nodes:');
H = zeros (m, n);
% Given variable nodal degree distribution sequence DV = 0.38354*x+0.04237*x^2+0.57409*x^3
% In order to get better performance, the density evolution theory is used to select the degree distribution sequence.
DV = inline ('0.38354 * x + 0.04237 * X. ^ 2 + 0.57409 * X. ^ 3','x');
% Calculate the number of nodes per degree distribution
INDV = quadl (dv, 0, 1);
A2 = round (n* (0.38354/2/indv));
A3 = round (n* (0.04273/3/indv);
DS (1:a2) =2;
DS (a2 + 1: A3 + a2) = 3;) Platform: |
Size: 1024 |
Author:MATLAB编程 |
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Search - density evolution LDPC