QC-LDPC码构造及其在BICM-ID系统中的应用  

QC-LDPC Code Construction and Its Application in BICM-ID System

作　　者：江梓弘 陈晓鹏[1] 周林[1,2] 贺玉成[1,2] JIANG Zi-hong;CHEN Xiao-peng;ZHOU Lin;HE Yu-cheng(Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen Fujian 361021,China;State Key Laboratory of Integrated Services Networks,Xidian University,Xi'an Shaanxi 710000,China)

机构地区：[1]华侨大学厦门市移动多媒体通信重点实验室,福建厦门361021 [2]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710000

出　　处：《通信技术》2018年第3期511-515,共5页Communications Technology

基　　金：国家自然科学基金项目(No.61302095;No.61401165);华侨大学科研基金(No.12BS219;No.13Y0384;No.13BS101);华侨大学研究生科研创新能力培育计划资助项目~~

摘　　要：基于有限域的两个子集,构造准循环LDPC(Quasi-Cyclic LDPC,QC-LDPC)码的基矩阵,并针对传统算法构造掩模(masking)矩阵的缺陷,设计了一种简单有效的掩模矩阵构造方法。然后,将构造的QC-LDPC码与比特交织迭代译码编码调制(Bit-Interleaved Coded Modulation with Interleaved Decoding,BICM-ID)系统相结合,分别选用QPSK、16QAM、64QAM三种调制方式,对其在高斯白噪声信道和瑞利衰落信道下的性能进行仿真。仿真结果表明:所提方案的误码率性能相对于传统方法有明显改善。Based on the two subsets of the finite field,the base matrix of the quasi-cyclic LDPC(Quasi-Cyclic LDPC,QC-LDPC)code is constructed.In view of the defects for traditional algorithm,a simple and effective method for constructing the masking matrix is designed.Then,the constructed QC-LDPC code is combined with the Bit-Interleaved Coded Modulation with Interleaved Decoding system,the three modulation modes of QPSK,16QAM and64QAM respectively selected,and their performance in Gauss white noise channel and Rayleigh fading channel simulated.The simulation results indicate that there is a significant improvement in the bit-error-rate performance of the proposed scheme compared with the traditional method.

关 键 词：LDPC码 准循环 编码调制 比特交织 迭代 

分 类 号：TN911.22[电子电信—通信与信息系统]