基于多维乘积码的编码协作方案研究

Research of Coded Cooperation Scheme Based on Multidimensional Product Codes

多维乘积码是一种成熟的编码技术,其性能较好,且具有灵活的多维结构。本文提出一种基于多维乘积码的协作方案,利用不同维数的校验位进行协作,达到获取分集增益的目的。文中以分量码为扩展汉明码的多维乘积码为例,在慢衰落、快衰落瑞利信道下进行了理论性能分析和计算机仿真,仿真结果显示:慢衰落信道下,BER为10-3时,协作程度为50%,用户间信道SNR大于10dB时,增益大于8dB;在快衰落信道下,可以通过该协作方案可达到帮助上行信道较差的用户的目的。从实用性和良好性能的角度来看,该编码协作将具有较好的应用前景。

Multidimensional product codes are a kind of mature EEC（error-correcting codes） with good performance and agile code structure.A new style coded cooperation scheme based on multidimensional product codes is discussed particularly in this paper,which uses the different dimension parity bits to cooperate.This coded cooperation scheme can get large diversity gain.Multidimensional product codes with extended hamming codes are used in theory analysis and computer simulation,slow fading channel and fast fading channel are two kinds channel model.The result of simulation shows that：on slow fading channel,Bit Error Rate （BER） is 10-3,cooperation level is 50%,when the inter-user SNR is larger than 10dB,large gain（8dB） is obtained;on fast fading channel,coded cooperation make the user with worse uplink channel perform better.The coded cooperation will have better application,in view of its practicability and good performance.