On the girth of quasi-cyclic protograph LDPC codes
M Karimi, AH Banihashemi - IEEE transactions on information …, 2013 - ieeexplore.ieee.org
In this paper, we study the relationships between the girth of the Tanner graph of a quasi-
cyclic (QC) protograph low-density parity-check (LDPC) code, the lifting degree, and the size …
cyclic (QC) protograph low-density parity-check (LDPC) code, the lifting degree, and the size …
Design of multiple-edge protographs for QC LDPC codes avoiding short inevitable cycles
There have been lots of efforts on the construction of quasi-cyclic (QC) low-density parity-
check (LDPC) codes with large girth. However, most of them focus on protographs with …
check (LDPC) codes with large girth. However, most of them focus on protographs with …
System and method for structured LDPC code family with fixed code length and no puncturing
S Abu-Surra, E Pisek, Z Pi - US Patent 8,495,450, 2013 - Google Patents
A family of low density parity check (LDPC) codes is generated based on a mother code
having a highest code rate. The low density parity check (LDPC) codes include a codeword …
having a highest code rate. The low density parity check (LDPC) codes include a codeword …
System and method for structured LDPC code family
S Abu-Surra, E Pisek, Z Pi - US Patent 8,560,911, 2013 - Google Patents
(57) ABSTRACT A low density parity check (LDPC) family of codes is con structed by:
determining a protograph for a mother code for the LDPC family of codes. The protograph is …
determining a protograph for a mother code for the LDPC family of codes. The protograph is …
Column-weight three QC LDPC codes with girth 20
M Gholami, M Samadieh… - IEEE communications …, 2013 - ieeexplore.ieee.org
In this paper, some well-structured block designs are presented whose incidence matrices
can be considered as the mother matrices of some regular and irregular column-weight …
can be considered as the mother matrices of some regular and irregular column-weight …
Design of binary and nonbinary codes from lifting of girth-8 cycle codes with minimum lengths
M Gholami, M Samadieh - IEEE communications letters, 2013 - ieeexplore.ieee.org
-In this paper, some regular and irregular girth-8 cycle codes with arbitrarily high code rates
are presented which have minimum lengths among all girth-8 cycle codes having parity …
are presented which have minimum lengths among all girth-8 cycle codes having parity …
An efficient exhaustive low-weight codeword search for structured LDPC codes
In this paper, we present an algorithm to find all low-weight codewords in a given quasi-
cyclic (QC) low-density parity-check (LDPC) code with a fixed column-weight and girth. The …
cyclic (QC) low-density parity-check (LDPC) code with a fixed column-weight and girth. The …
Low-density parity-check codes based on steiner systems and permutation matrices
FI Ivanov, VV Zyablov - Problems of Information Transmission, 2013 - Springer
An algorithm for generating parity-check matrices of regular low-density paritycheck codes
based on permutation matrices and Steiner triple systems S (v, 3, 2), v= 2 m− 1, is proposed …
based on permutation matrices and Steiner triple systems S (v, 3, 2), v= 2 m− 1, is proposed …
QC-LDPC 码在混沌DSSS-NBJ 抑制中的性能分析
李思佳， 毛玉泉， 李波， 裴鑫， 吴崇虎 - 电路与系统学报, 2013 - cqvip.com
以低信噪比窄带干扰条件下混沌DSSS 系统信息传输的可靠性提高为目的, 在混沌DSSS
系统的基础上, 结合QC-LDPC 码提出了一种基于QC-LDPC-CDSSS 的协同窄带干扰 …
系统的基础上, 结合QC-LDPC 码提出了一种基于QC-LDPC-CDSSS 的协同窄带干扰 …
QC LDPC 码低复杂度消环算法
李晓峰， 冯大政， 胡树楷 - 信号处理, 2013 - cqvip.com
QCLDPC (Quasi—cyclicLow—densityParity—check) 是一类半结构化的低密度奇偶校验码,
其分块的矩阵结构具有超大规模集成电路实现上的便利, 同时保持了优异的纠错性能 …
其分块的矩阵结构具有超大规模集成电路实现上的便利, 同时保持了优异的纠错性能 …