| 衰落信道的空间相关性对空时编码性能的影响分析 |
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| 引用本文： | 王超,廖桂生,张林让,吴顺君. 衰落信道的空间相关性对空时编码性能的影响分析[J]. 电子学报, 2003, 31(9): 1286-1289 |
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| 作者姓名： | 王超 廖桂生 张林让 吴顺君 |
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| 作者单位： | 西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 |
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| 基金项目： | 国家自然科学基金 (No 60 1 72 0 2 8,60 1 0 2 0 0 5) |
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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.
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| 关 键 词： | 空时编码 空间相关 成对错误概率 MIMO 发射分集 |
| 文章编号： | 0372-2112(2003)09-1286-04 |
| 收稿时间： | 2002-06-05 |
Analysis of Effect of Spatial Fading Correlation on Performance of Space-Time Coding |
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| WANG Chao,LIAO Gui sheng,ZHANG Lin rang,WU Shun jun. Analysis of Effect of Spatial Fading Correlation on Performance of Space-Time Coding[J]. Acta Electronica Sinica, 2003, 31(9): 1286-1289 |
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| Authors: | WANG Chao LIAO Gui sheng ZHANG Lin rang WU Shun jun |
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| Abstract: | A basic assumption in studying space time coding is that the fading channels between different transmit antenna and different receive antenna pairs are independent,but it can not always hold in real life circumstances and the Rayleigh fading channels are usually spatially correlated.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 we can get to a conclusion that a coherent detection scheme for space time codes is quite robust to spatial correlation effects. |
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| Keywords: | space timecode(STC) spatial correlation pairwise error probability(PEP) MIMO transmit diversity |
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