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Description: Software for Low Density Parity Check Codes Radford M. Neal Version of 2006-02-08. This collection of programs and modules, written in C, is intended to support research and education concerning Low Density Parity Check (LDPC) codes. (Note, however, that the copyright notice no longer restricts use to these purposes). These codes were invented by Robert Gallager in the early 1960's, and re-invented and shown to have very good performance by David MacKay and myself in the mid-1990's. The decoding algorithm for LDPC codes is related to that used for Turbo codes, and to probabilistic inference methods used in other fields. Variations on LDPC and Turbo codes are currently the best practical codes known, in terms of their ability to transmit data at rates approaching channel capacity with very low error probability.
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Author: netor4you@yahoo.com |
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Description: There is an example of how to use the LDPC encode/decode with AWGN
channel model in files .\ldpc_decode.m and .\GFq\ldpc_decode.m.
There are a few parity check matrices available in the code but
you can use other matrices provided you have enough memory to load
them. I suggest checking out matrices in Alist format available on
David MacKay s web site.You will need to have access to a MEX compiler
to be able to use a few functions written in C.
LDPC的仿真代码-There is an example of how to use the LDPC enc ode/decode with AWGN channel model in files. \ l dpc_decode.m and. \ GFq \ ldpc_decode.m. There are a few parity check matrices available in the code but you can use other matrices provided you have enough memory to load them. I suggest check ing out matrices in Alist format available on Da vid MacKay's web site.You will need to have acces MEX's to a compiler to be able to use a few function 's written in C. Simulation LDPC code
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Size: 593920 |
Author: 王文 |
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Description: 基于C语言仿真 LDPC编解码仿真程序，希望对各位有用-Based on the C language simulation LDPC codec simulation program, in the hope that useful
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Size: 931840 |
Author: hxf |
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Description: 这个是用VC编的关于LDPC码方面的应用程序,很全的,包括编码译码等方面的仿真-This is made with VC on the LDPC code in the application process, it is wide, including codecs, etc. The simulation
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Size: 591872 |
Author: 周水红 |
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Description: This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in a MIMO-environment.
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Size: 10647552 |
Author: 武博 |
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Description: This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal’s programs collection, which can be found in [1]. While Neal’s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has error in his log-likelihood decoder). -This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal s programs collection, which can be found in [1]. While Neal s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has error in his log-likelihood decoder).
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Size: 7168 |
Author: 武博 |
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Description: LDPC的完整c语言开发源程序代码，可以直接运行，没有错误，里面含有文件：
construct_matrix.cpp
decode.cpp
encode.cpp
Gaussian_channel.cpp
generating_matrix.cpp
get_matrix.cpp
LDPC_main.c-LDPC complete c language source code, can be directly run, no errors, which contains documents: construct_matrix.cppdecode.cppencode.cppGaussian_channel.cppgenerating_matrix.cppget_matrix.cppLDPC_main.c
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Size: 1106944 |
Author: annal |
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Description: This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal’s programs collection, which can be found in [1]. While Neal’s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has error in his log-likelihood decoder). -This LDPC software is intended as an introduction to LDPC codes computer based simulation. The pseudo-random irregular low density parity check matrix is based on Radford M. Neal s programs collection, which can be found in [1]. While Neal s collection is well documented, in my opinion, C source codes are still overwhelming, especially if you are not knowledgeable in C language. My software is written for MATLAB, which is more readable than C. You may also want to refer to another MATLAB based LDPC source codes in [2], which has different flavor of code-writing style (in fact Arun has error in his log-likelihood decoder).
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Author: 张强 |
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Description: ldpc decode c程序
Iterative probabilistic decoding of linear block codes.Based on Pearl s Belief Propagation in Bayesian Networks.This version utilizes object to define graph nodes and LOG-LIKELIHOOD RATIOS. Much improved in terms of speed compared to log_pearl.c.
It can use a look-up table to avoid exp() computations-ldpc decode c procedure Iterative probabilistic decoding of linear block codes.Based on Pearl s Belief Propagation in Bayesian Networks.This version utilizes object to define graph nodes and LOG-LIKELIHOOD RATIOS. Much improved in terms of speed compared to log_pearl.c.It can use a look-up table to avoid exp () computations
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Size: 4096 |
Author: sblkiaw |
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Description: LDPC码在AWGN信道下的译码程序（c语言）-LDPC code in AWGN channel decoding procedures under (c language)
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Size: 7168 |
Author: 娜 |
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Description: LDPC码在AWGN信道下的译码程序（c语言）-ALLIANCES is a recently proposed cooperative random access
protocol for wireless networks. In this paper we modify the
original model to include user location information. We also
derive pair-wise error probability (PEP) under Rayleigh flat
fading channel and a power-law attenuation environment.
Based on the PEP analysis we propose an optimal relay
selection scheme, which achieves significant throughput gains as
compared to the random relay selection scheme in the original
ALLIANCES.
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Size: 7168 |
Author: 史志举 |
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Description: LDPC demo software in C
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Size: 6643712 |
Author: yahyajan |
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Description: LDPC纠错码的C语言实现，包含15个工程文件，涵盖了一个码字在信道中传输的整个过程-LDPC error-correcting code of C language implementation, including 15 engineering documents, covering a code word in the whole process of transmission channels
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Size: 6107136 |
Author: 彭秋平 |
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Description: matlab下LDPC的编解码程序，其中编解码是用Mex下的C写的，运行很快。希望对大家有用。-matlab program under the LDPC codec, which codec is written in C under Mex running quickly. Hope to be useful.
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Size: 5905408 |
Author: 刘凌 |
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Description: LDPC 码的编译码的c语言实现,译码采用的是bp算法,简洁实用-Decoding of LDPC codes c language, decoding algorithm is used in bp, simple and practical
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Size: 8754176 |
Author: 绿竹小子 |
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Description: 此为C++环境下的LDPC编译码的完整的源代码。常用于通信系统的编译码仿真过程。有助于各种项目的完成。-This is the C++ environment LDPC coding and decoding of the complete source code. Commonly used in the encoding and decoding communication system simulation. Contribute to the completion of various projects.
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Size: 1489920 |
Author: 黄珊琳 |
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Description: 这是关于LDPC信道编码模块设计的程序
打开源程序，先运行gengrate_h.m程序，陆续将码长设置为756bit，列重设置为3，行重设置为9。在Workspace中同时将H、A、B、C、D、E、Hget、Fget、g、Tget这是个变量选择另存为encode_in.mat 格式。再运行main_encode.m进行编码，主程序运行后，在当前目录下，自动生成编码结果文件“encode—out.mat”，这将作为下一次扩频调制仿真实验的的输入信号。最后分别查看Workspace中的变量s（编码前数据）和xyuan（编码后数据）的波形。
对比后，可以看出编码前的数据码片长度为504bit，编码后的码片数据长度为756bit。编码效率=编码前码片长度/编码后码片长度=2/3。-This is about the LDPC channel coding module design process
Open source, first run gengrate_h.m program, phasing out the code length is set to 756bit, column re-set to 3, line weight is set to 9. In the Workspace in the same time, H, A, B, C, D, E, Hget, Fget, g, Tget This is a variable select Save As encode_in.mat format. Then run main_encode.m encoding, the main program running in the current directory, the results of automatically generated code file "encode-out.mat", which will serve as the next simulation of the spread spectrum modulation input signal. Finally, the variables were View Workspace in s (before encoding data) and xyuan (encoded data) waveform.
After comparison, we can see the data before encoding chip length of 504bit, encoded data length of chip 756bit. Coded before coding efficiency = chip length/length of the encoded chip = 2/3.
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Size: 15360 |
Author: 吴健 |
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Description: 使用C编写的LDPC编码与解码程序，在linux下运行-Written in C and LDPC encoding and decoding process, running in linux
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Size: 423936 |
Author: 刘壮 |
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Description: C语言实现的LDPC（Low Density Parity Check Codes）通信仿真代码(Software for Low Density Parity Check Codes
Version of 2012-02-11.
This collection of programs and modules, written in C, is intended to support research and education concerning Low Density Parity Check (LDPC) codes. (Note, however, that the copyright notice no longer restricts use to these purposes). These error-correcting codes were invented by Robert Gallager in the early 1960's, and re-invented and shown to have very good performance by David MacKay and myself in the mid-1990's. The decoding algorithm for LDPC codes is related to that used for Turbo codes, and to probabilistic inference methods used in other fields. Variations on LDPC and Turbo codes are currently the best practical codes known, in terms of their ability to transmit data at rates approaching channel capacity with very low error probability.)
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Size: 357376 |
Author: kai05911
|
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Description: ldpc码的c语言实现,采用各种码长和alist(implemention in c about ldpc)
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Size: 355328 |
Author: xjg |
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