arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1202.0702cs.ITmath.IT
收藏

循环矩阵的低密度阵列:秩和行Redundancy分析及准循环LDPC码

Low-Density Arrays of Circulant Matrices: Rank and Row-Redundancy Analysis, and Quasi-Cyclic LDPC Codes

Qin Huang, Keke Liu, Zulin Wang

摘要:

本文对零空间为QC-LDPC码的循环数阵列的秩冗余和行冗余进行了一般性分析。基于Fourier变换和矩阵共轭类及Hadamard积的性质,给出了一般循环数组的秩和行冗余度的严格上界,使得在构造QC-LDPC码时考虑行冗余度以获得更好的性能成为可能.进一步研究了基于Vandermonde矩阵和基于拉丁方的QC-LDPC码的秩,并给出了在某些特定情况下的秩的组合表达式,证明了所得到的界的紧性.此外,本文还分析了几种新的大行冗余准循环LDPC码的构造方法。

英文摘要:

This paper is concerned with general analysis on the rank and row-redundancy of an array of circulants whose null space defines a QC-LDPC code. Based on the Fourier transform and the properties of conjugacy classes and Hadamard products of matrices, we derive tight upper bounds on rank and row-redundancy for general array of circulants, which make it possible to consider row-redundancy in constructions of QC-LDPC codes to achieve better performance. We further investigate the rank of two types of construction of QC-LDPC codes: constructions based on Vandermonde Matrices and Latin Squares and give combinatorial expression of the exact rank in some specific cases, which demonstrates the tightness of the bound we derive. Moreover, several types of new construction of QC-LDPC codes with large row-redundancy are presented and analyzed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑