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資源簡介

LDPC編解碼的MATLAB仿真實現 這個Matlab仿真程序實現LDPC低密度奇偶校驗碼（Low Density Parity Check）算法。適用于AWGN信道。 (Matlab simulation of LDPC Encoding and decoding This matlab simulation program implements LDPC low density parity check algorithm. Suitable for AWGN channel.)

資源截圖

代碼片段和文件信息 

clc;
clear?all;
m=250;n=[3005001000];%校驗矩陣的n是碼長
frame=500;
Eb_N0=[0:0.5:5];

for?ii=1:3
R（ii）=（n（ii）-m）/n（ii）
H（ii）=getH（mn（ii））???????%load?H;?H-->G
[G（ii）valid]=H2G（H（ii））;?
while?valid==0???????????????????%valid作為校驗矩陣是否為滿秩的標志若為非滿秩（valid=0）則返回重新利用1A隨機構造
H（ii）=getH（mn（ii））;?????????????????????%構造校驗矩陣H
[G（ii）valid]=H2G（H（ii））;????????????????%將校驗矩陣H轉化為生成矩陣G
end
end




????for?i=1:length（Eb_N0）
?????EN=10^（Eb_N0（i）/10）
????sigma=sqrt（1./（2*EN*R））;
????ber（i）=0;

??????for?num=1:frame??
????????num
????????x?=?（sign（randn（1size（G1）））+1）/2;?%?random?bits
????????y?=?mod（x*G2）;?????????????????????%?coding?
????????bpskmod?=bpsk（y）;??????????????????????????%BPSK?modulation
????????
????????z=bpskmod?+?sigma*randn（1length（bpskmod））;???%?AWGN?transmi

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1731??2011-05-22?19:52??1.asv
?????文件????????1767??2011-05-22?21:21??1.m
?????文件?????????347??2011-05-20?00:22??bpsk.m
?????文件???????64037??2011-05-21?21:32??duibi.jpg
?????文件????????3302??2011-05-22?20:05??frame.asv
?????文件???????12010??2011-05-20?21:04??G.mat
?????文件?????????333??2010-05-09?11:31??getG.asv
?????文件????????4255??2011-05-22?15:54??getH.asv
?????文件????????4219??2010-05-08?10:14??getH.m
?????文件????????8440??2011-05-22?22:09??H.mat
?????文件?????????847??2010-05-12?19:53??H2G.m
?????文件????????3523??2011-05-20?20:46??ldpc_decode.asv
?????文件????????3523??2011-05-21?22:03??ldpc_decode.m
?????文件????????1457??2011-05-22?21:57??ldpc_decodeber.asv
?????文件????????1465??2011-05-22?22:01??ldpc_decodeber.m
?????文件???????????0??2011-05-21?17:38??Untitled.asv
?????文件???????63282??2011-05-21?17:13??untitled.jpg
?????文件???????65922??2011-05-20?22:30??圖.jpg
?????目錄???????????0??2011-05-13?15:48??圖r=0.5\
?????文件??????236278??2010-05-09?08:59??圖r=0.5\252_504_1000.bmp
?????文件??????252518??2010-05-09?11:27??圖r=0.5\252_504_10000（補充）.bmp
?????文件??????236278??2010-05-09?11:00??圖r=0.5\252_504_10000.bmp
?????文件??????236278??2010-05-11?12:48??圖r=0.5\256_512_20000（補充）.bmp
?????文件????????6784??2010-05-15?11:11??圖r=0.5\256_512_3000.fig
?????文件??????236278??2010-05-13?12:15??圖r=0.5\256_512_5000.bmp
?????文件????????8963??2010-05-14?18:24??圖r=0.5\256_512_5000.fig
?????文件??????252518??2010-05-09?15:26??圖r=0.5\96_192_10000.bmp
?????文件????????6776??2010-05-15?16:49??圖r=0.5\untitled.fig
?????目錄???????????0??2011-05-13?15:48??圖r=0.667\
?????文件????????6740??2010-05-16?18:37??圖r=0.667\1.fig
?????文件????????6790??2010-05-14?20:52??圖r=0.667\2.fig
............此處省略31個文件信息

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