基于LDPC码有效编码算法的编码调制系统  

Coding and Modulating System Based on Effective Encoding Algorithm for Low Density Parity Check Codes

作　　者：尹晓琦[1] 殷奎喜[1] 

机构地区：[1]南京师范大学物理科学与技术学院

出　　处：《无线电通信技术》2007年第2期23-25,共3页Radio Communications Technology

基　　金：地理信息科学江苏省重点实验室开放基金(JK20050304)

摘　　要：低密度奇偶校验码(LDPC码)的直接编码运算量较大,采用基于下三角矩阵的有效编码算法,通过重排列的顺序得到一个新的校验矩阵,以控制编码运算量为线性复杂度。编码后经过BPSK调制,采用对数域的BP译码算法进行解码。仿真结果表明,在AWGN信道下该系统有较好的误码率性能。The amount of operations about directly encoding Low Density Parity Check Codes （LDPC） is pretty large. In this paper, an effective encoding algorithm on matrix in approximate lower triangular form is used, which gets a new check matrix by performing column permutations, so as to control the amount of operations to be linear. It is modulated by BPSK after coding. And BP decoding algorithm is used. Simulation results show that the error rate performance of this system is good over AWGN channel.

关 键 词：LDPC码 有效编码 正则码 仿真 

分 类 号：TN911.22[电子电信—通信与信息系统]