基于非规则LDPC码的协作MIMO系统性能分析  

Performance Analysis of Cooperative MIMO System with Irregular LDPC

作　　者：张艳[1,2] 仰枫帆[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016 [2]南京信息职业技术学院电子信息学院,南京210032

出　　处：《数据采集与处理》2013年第6期714-718,共5页Journal of Data Acquisition and Processing

基　　金：航空基金(20105552)资助项目

摘　　要：提出了一种基于非规则低密度奇偶校验码(Low density parity check codes,LDPC)码设计的用户协作分集方案,并且给出了准静态的瑞利衰落信道下单用户单中继环境下的3种中继协议的性能比较和中断概率理论推导,比较分析了采用编码协作策略的双用户多中继环境下的系统的误比特性能和中断概率的仿真图。结果表明采用了非规则LDPC码的编码协作协议的系统性能明显优于放大转发(Amplify forward,AF)协议和解码转发(Decode forward,DF)协议,误码率分别提高了0.4dB和0.8dB,中断概率性能也明显提高,性能得到显著改善。A novel cooperative diversity scheme with irregular low density parity check code （LDPC） design is proposed. Theoretical derivation and system simulation are also presented for three different bit error rate and outage probability numerical results of one user and one re- lay in the quasi-static Rayleigh fading channels. The bit error performance and outage probabil- ity simulation in the multi-user and multi-relays scenarios using coded cooperation strategy are compared and analyzed. The results show that the performance of cooperative multiple-input multiple-output（MIMO） system with coded cooperative protocol is ohviously superior to am- plify forward protocol, and decode forward protocol, and the bit error rate is increased by 0.4 dB and 0.8 dB, respectively. Besides, the outage probability is decreased considerably. There- fore, performance is improved significantly.

关 键 词：编码协作 协作MIMO 误比特率 中断概率 非规则LDPC 

分 类 号：TN911[电子电信—通信与信息系统]