LDPC编码的MIMO大气激光通信系统研究  

Study on LDPC codes MIMO atmospheric laser communication system

作　　者：蔡浩[1] 

机构地区：[1]长春理工大学电子信息工程学院,长春130022

出　　处：《信息技术》2015年第8期108-109,112,共3页Information Technology

摘　　要：通过将信道编码LDPC与分集技术相结合,分析了级联空时码在对抗大气湍流效应的作用。首先建立了Gamma-Gamma大气湍流信道模型,并且设计了LDPC编码的MIMO自由空间光通信系统,仿真了弱湍流和强湍流两种情况下,未编码和已编码的MIMO系统的性能。结果表明,在弱湍流和强湍流情况下,LDPC编码的MIMO系统较未编码的MIMO系统的误码率得到了很好的改善,性能得到了极大的提升。By combining LDPC channel coding and diversity technology,this paper analyses cascading space-time code against the atmospheric turbulence effects. First,it established a Gamma-Gamma atmospheric turbulence channel model, and designed LDPC coded MIMO free space optical communication system,simulated uncoded and coded MIMO system performance under the weak turbulence and the strong turbulence cases. The results showed that regardless of the turbulence intensity,BER of LDPC coded MIMO system relatively well improved,the performance is greatly improved.

关 键 词：多输入多输出 低密度奇偶校验码 垂直分层空时码 误码率 

分 类 号：TN929.12[电子电信—通信与信息系统]