载波频率偏移下分布式MIMO系统性能分析

文中针对载波频率偏移对分布式MIMO系统的性能进行了仿真分析，仿真结果表明：载波频率偏移和不理想的信道估计会对系统性能产生较大影响；高阶调制更容易受到载波频率偏移的影响；ZF和MMSE译码算法与传统的Alamouti译码算法相比对于载波频率偏移更加稳健，当｜w-2-w-1｜取值较大时，采用ZF和MMSE译码性能要好于传统的Alamouti译码算法；随着各链路载波频率偏移差别｜w-2-w-1｜的减小，传统的Alamouti译码算法性能不断改善。

Performance Analysis of Distributed MIMO System with CFOs

The performance of distributed MIMO system with CFOs is analysised in this paper. Simulation results show that CFOs and unperfect channel tracking have great influence on the system. High order modulation is more sensitive than lower ones. The performance of ZF and MMSE receivers are more robust for the consider of 1w and w2 than conventional Alamouti detection. When the difference of ｜w-2-w-1｜ is large, it is better to use ZF and MMSE receivers than conventional Alamouti detection. The performance of conventional Alamouti decoding improves as soon as ｜w-2-w-1｜ is reduced.