一种改进的PS-LDPC码构造法

刘宁庆¹, 王焜¹, 孙浩伟²

1.哈尔滨工业大学通信技术研究所;2.中国海军驻哈尔滨地区舰船配套军事代表室



摘要:

为提高校验矩阵的构造效率,对子矩阵的移位系数的选择提出了合理的理论准则,并提供了一种直观且合理的寻找矩阵中闭合环路的方法以简化构造过程.以AWGN信道仿真考察了采用这种改进方法构造的PS-LDPC码的译码性能.仿真结果证明采用此改进算法构造的PS-LDPC码具有更优的BER性能.

关键词:  PS-LDPC码  移位矩阵  周长  最小距离  闭合环路

DOI：10.11918/j.issn.0367-6234.2011.03.006

分类号:TN911.2

基金项目:



An Improved algorithm for constructing PS-LDPC codes

LIU Ning-qing¹, WANG Kun¹, SUN Hao-wei²

1.Institute of Communication Technology,Harbin Institute of Technology,150080 Harbin,China;2.Military Representative Office of PLA in Harbin for Naval Equipment,150046 Harbin,China)

Abstract:

Partition-and-Shift codes have been paid much attention in the area of error correction in telecommunication system,because of its ideal girth and min-distance property.An Improved algorithm for constructing PS-LDPC codes is presented to improve constructing efficiency,by employing a precise criterion for choosing the shift parameters in shift matrix and a perspicuous and reasonable method to search for closed paths simply.Finally,the improved PS-LDPC codes are simulated over AWGN channel and a better BER performance is obtained.

Key words:  Partition-and-Shift codes  shift matrix  girth  min-distance  closed path