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CONSTRUCTION OF QC LDPC
no vote
The Program to construct a  short length of QC LDPC codes without girth 4 and girth 6 This program presents an approach  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  
dreamath
2016-08-23
2
1
Polar Code Encoder and Decoder
4.0
The necessary background for polar coding related to this package can be found in the paper E. Arikan, "A Performance Comparison of Polar Codes and Reed-Muller Codes," IEEE COMMUNICATIONS LETTERS, VOL. 12, NO. 6, JUNE 2008. The software package includes a test file "main.m" which may be edited for various different codes.This version has no bit reversal in encoding.This version uses mex files to improve the decoding speed.Uses submatrices of G_RM(n,n) in natural index order
dreamath
2016-08-23
0
1
LDPC ENCODING
no vote
Description: qc-ldpc encoding matlab source is divided into several versions, small folder support small sparse matrix, large folder support large sparse matrices. test file for the top -qc-ldpc, the code contains the coding portion of LDPC codes only, get through the check matrix generator matrix
dreamath
2016-08-23
3
1
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