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为进一步提高空时码性能,在信道模型为瑞丽和莱斯慢衰落信道的情况下,文中提出了一种优化差分空时分组码的“天线子集选择算法”——假设发射信号为特定的Alamouti正交空时分组码,通过最大化信道参数矩阵F范数的方法,优化了MIMO系统的天线集。仿真结果表明:此方法可降低码元的比特错误率,并且可获得相当客观的分集增益和能量增益。此外,还讨论了该优化方法的适用范围。
In order to further improve the performance of space-time codes, we propose an “antenna subset selection algorithm” that optimizes differential space-time block codes in the case of channel models of Rayleigh and Rice slow fading channels. Suppose the transmitted signal is The specific Alamouti orthogonal space-time block code optimizes the MIMO antenna array by maximizing the F-norm of the channel parameter matrix. The simulation results show that this method can reduce the symbol bit error rate, and obtain a fairly objective diversity gain and energy gain. In addition, the scope of the optimization method is discussed.