联合多元信道编码调制-网络编码方案  

Research of the joint Q-ary channel coding modulation-network coding scheme

作　　者：佟宁宁[1,2] 赵旦峰[1] 吴宇平[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]黑龙江工程学院电气与信息工程学院,黑龙江哈尔滨150050

出　　处：《哈尔滨工程大学学报》2014年第6期753-759,共7页Journal of Harbin Engineering University

基　　金：黑龙江省自然科学基金资助项目(F200810);中兴通信产学研合作论坛资助项目(高阶域编码与调制技术一体化研究)

摘　　要：为了使协作中继通信系统在有效性和可靠性之间获得较好的折中,提出一种新型的联合多元信道编码调制-网络编码一体化设计方案,即多元低密度奇偶校验码(low-density parity-check codes,LDPC)-比特交织编码调制(bit interleaved coded modulation,BICM)-网络编码方案。该方案将多元信道编码调制技术与网络编码技术在中继节点相结合,译码时考虑到序列的相关性,采用联合迭代相关译码算法,在保证系统的有效性的同时,提高了系统的可靠性。仿真结果表明:联合多元信道编码调制-网络编码方案与无中继系统、信源不相关的多元LDPC-BICM系统相比,均可获得较好编码增益,大幅度提高了系统的可靠性。In order to make the cooperative relay communication system achieve good tradeoff between effectiveness and reliability, a novel joint Q-ary channel coding modulation-network coding integration design program has been proposed, specifically the Q-ary low-density parity-check codes （ LDPC ）-bit interleaved coded modulation （ BICM）-network coding scheme. This scheme combines Q-ary channel coding modulation technology with network coding technology in the relay node, and takes into account the correlation of the sequence of source nodes. A joint iterative correlation decoding algorithm was used to ensure the effectiveness of the system and to improve the reliability of the system when decoding. Simulation results demonstrate that, in comparison with the Q-ary LDPC-BICM system without a relay system and uncorrelated signal source, the scheme proposed by this paper can obtain better coding gains and greatly improve the reliability of the system.

关 键 词：多元LDPC码 网络编码 比特交织编码调制 相关译码 迭代译码 瑞利信道 协作通信 高可靠性 

分 类 号：TN911.22[电子电信—通信与信息系统]