电讯技术2016，Vol.56Issue(7)：724-728,5.DOI:10.3969/j.issn.1001-893x.2016.07.002
利用域间映射的多元QC-LDPC码构造
Construction of Q-ary QC-LDPC Codes with Galois Filed Mapping
摘要
Abstract
An approach to construct Q-ary quasi-cyclic( QC) low density parity check( LDPC) codes with low decoding complexity is presented by defining a mapping relationship over Galois field. With this meth-od,the parity check matrix over a higher order Galois field can be mapped to a designated Galois field, which can keep its structural property and density degree. Codes constructed by this method have low deco-ding complexity and quasi-cyclic characteristic,which can be easily implemented by shift registers. Simula-tion results show that the constructed codes have good performance over additive white Gaussian noise ( AWGN) channel. Compared with the original codes,QC-LDPC codes with rate 0. 765 at targeted field GF (8) can achieve a performance gain about 0. 2 dB around 10-6 bit error rate(BER).关键词
多元LDPC码/准循环/有限域映射/低译码复杂度Key words
Q-ary LDPC codes/quasi-cyclic/Galois field mapping/low decoding complexity分类
信息技术与安全科学引用本文复制引用
洪冰清,刘聪聪,陈海强,覃新贤..利用域间映射的多元QC-LDPC码构造[J].电讯技术,2016,56(7):724-728,5.基金项目
国家自然科学基金资助项目(61102090,61362010) （61102090,61362010）
广西自然科学基金资助项目(2012GXNSFAA053217,2014GXNSFBA118276) （2012GXNSFAA053217,2014GXNSFBA118276）
