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衰落信道的空间相关性对空时编码性能的影响分析

Analysis of Effect of Spatial Fading Correlation on Performance of Space-Time Coding
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摘要 研究空时编码的一个重要的基本假设就是各衰落信道互相独立 ,这一点在实际应用环境中不尽满足 .本文首先详细推导了多发射天线、多接收天线间的瑞利衰落信道存在空间相关性的条件下 ,空时编码的成对错误概率的精确表达式 ,并基于此分析了其误码率性能 ,最后给出的空间相关条件下的空时分组编码的误码率性能仿真 ,验证了理论分析的有效性 ,同时可以得到已知信道状态信息的空时编码的相关检测方案对空间相关具有较强的鲁棒性的结论 . An exact pairwise error probability expression for space-time codes is derived under spatial correlation, and based on this, bit error probability estimation is analyzed. Finally, the analytical results are verified through our computer simulation made for STBC and it is concluded that a coherent detection scheme for space-time codes is quite robust to spatial correlation effects.
出处 《电子学报》 EI CAS CSCD 北大核心 2003年第9期1286-1289,共4页 Acta Electronica Sinica
基金 国家自然科学基金 (No 60 1 72 0 2 8 60 1 0 2 0 0 5)
关键词 空时编码 空间相关 成对错误概率 MIMO 发射分集 Antennas Coding errors Probability Rayleigh fading Signal to noise ratio
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