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考虑到正交空时分组码可提供满分集增益,以及垂直多层空时分组码能达到较高的数据传输速率,借鉴Tarokh构建基于天线分组的多层空时编码方法,本文提出了一种能根据接收信噪比自适应选择空时编码调制方式的MIMO传输方案,并给出了Monte-Carlo仿真与理论分析。仿真结果表明,在一定的信噪比范围内,方案在保证低误码率的条件下达到数据速率的最大化。
Considering that orthogonal space-time block codes can provide full-diversity gain and that vertical multi-layer space-time block codes can achieve higher data transmission rates, a multi-layer space-time coding method based on antenna groups is proposed based on Tarokh. MIMO transmission scheme that can adaptively choose space-time coding modulation according to received signal-to-noise ratio, and gives Monte-Carlo simulation and theoretical analysis. The simulation results show that the proposed scheme maximizes the data rate with a guaranteed low bit error rate within a certain SNR range.