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针对相关MIMO信道的差分空时块码

钱轶群1，钱叶旺1,2，杨绿溪1   

  1. 1. 东南大学 信息科学与工程学院，江苏 南京 210096；
    2. 池州师范专科学校 物理系，安徽 池州 247000
  • 收稿日期:2006-09-21 修回日期:2007-07-02 出版日期:2007-09-30 发布日期:2007-09-30

Differential Space-Time Block Code for Correlated MIMO Channels

QIAN Yi-qun1, QIAN Ye-wang1,2, YANG Lu-xi 1   

  1. 1. School of Information Science and Engineering, Southeast University, Nanjing 210096, China;
    2. Physics Department, Chizhou Normal College, Chizhou 247000, China
  • Received:2006-09-21 Revised:2007-07-02 Online:2007-09-30 Published:2007-09-30

被引次数

7

摘要： 针对相关衰落MIMO信道，提出了一种设计差分空时块码的方法，设计准则是使差分检测的平均成对错误概率的上界达到最小。最优的设计需要发射端和接收端的衰落相关性信息，且需要采用数值方法求解。通过忽略接收天线间的相关性可以减小反馈量，并且能得到有闭合表达式的次优设计。仿真结果表明,所提方案改善了系统的误码率性能，而次优设计获得的误码率性能接近最优设计。

关键词: MIMO信道, 衰落相关性, 差分空时块码, 成对错误概率

Abstract: A scheme of designing differential space-time code is proposed for correlated fading MIMO channels. The design criterion is to minimize the upper bound on the average pairwise error probability of differential detection. The optimal design requires knowledge of correlation both in the transmitter and the receiver, which must be obtained numerically. By ignoring receiver correlation, the amount of feedback can be reduced and a closed-form suboptimal solution can be obtained. Simulation results show that the proposed design improves the error performance, and the suboptimal design performs close to the optimal design.

Key words: MIMO channels, fading correlation, differential space-time block code, pairwise error probability