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Description: This paper is about serially concatenated LDGM codes for MIMO channel. The ability of Serially-Concatenated Low Density Generator Matrix (SCLDGM)
codes to approach the capacity of ergodic Multiple-Input Multiple-Output (MIMO) channels is investigated. The paper explains how to design good SCLDGM codes using EXtrinsic Information Transfer (EXIT) analysis and
optimum detection.
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Size: 214016 |
Author: mike zhou |
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Description: The paper is about bounds for LDPC and LDGM codes under MAP. A new method for analyzing low density parity check (LDPC) codes and low density generator
matrix (LDGM) codes under bit maximum a posteriori probability (MAP) decoding is
introduced. The method is based on a rigorous approach to spin glasses developed by Francesco
Guerra. It allows to construct lower bounds on the entropy of the transmitted message conditional
to the received one. Based on heuristic statistical mechanics calculations, we conjecture
such bounds to be tight. The result holds for standard irregular ensembles when used over
binary input output symmetric channels.
The method is first developed for Tanner graph ensembles with Poisson left degree distribution.
It is then generalized to ‘multi-Poisson’ graphs, and, by a completion procedure, to
arbitrary degree distribution.
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Size: 457728 |
Author: mike zhou |
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Description: ldpc码在AWGN信道下的性能仿真。包括geth.m,getG.m,H2G.m,decode.m,BER.m按传统的编码方案编码，生成H矩阵后转化为G矩阵，编码后送入高斯信道。仿真得到BER性能-ldpc codes in the AWGN channel performance simulation. Including geth.m, getG.m, H2G.m, decode.m, BER.m coded according to the traditional encoding scheme to generate H matrix is transformed into G matrix encoded into the Gaussian channel. Simulation, the BER performance
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Size: 68608 |
Author: 熊路 |
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Description: LDGM decoder function for Matlab.
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Size: 1024 |
Author: Shahriar |
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Description: matrix for channel coding with ldpc and ldgm and free 4-cycle
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Size: 13604864 |
Author: shahram |
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