重庆邮电学院学报（自然科学版）2005，Vol.17Issue(2)：138-143,6.
采用基于GF(q)的LDPC编码实现带宽有效传输及编码设计
Bandwidth efficient transmission of LDPC codes over GF(q) with optimal constructions
摘要
Abstract
In this paper, the authors combine irregular LDPC codes over GF (q) and q-ary modulations for bandwidth efficient transmission over AWGN channel and consider the optimization of the codes. To find a good LDPC code over GF(q), based on the previous work by Davey, one may choose a row profile and minimize a non-linear objective function subject to a series of linear constraints about the column profile of the parity check matrix. One major drawback of this method is that an important parameter, the average column (row) weight,doesn't participate in the optimization since the average column weight is determined as soon as a row profile is given. We relax Davey's constraints of fixed row profile, using instead all the constraints about the row profile, the column profile and the average column weight and introduce the complex method to solve this non-linear programming problem. This ensures that the average column weight of the parity-check matrix participates in the optimization.关键词
低密度奇偶校验编码/快速Hadamard变换/带宽有效传输Key words
LDPC codes/fast Hadamard transform/bandwidth efficient transmission分类
信息技术与安全科学引用本文复制引用
李祥明,SOLEYMANI M R,LODGE J,GUINAND P S..采用基于GF(q)的LDPC编码实现带宽有效传输及编码设计[J].重庆邮电学院学报（自然科学版）,2005,17(2):138-143,6.基金项目
重庆市科委科研项目(2004BB8062)和重庆邮电学院4G科研项目(A2004-52/53/54)资助 （2004BB8062）
