| 衰落信道下两发送天线MIMO系统V-BLAST算法研究 |
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| 引用本文： | 许荣涛,钟章队,陈建谋.衰落信道下两发送天线MIMO系统V-BLAST算法研究[J].北方交通大学学报,2010(5):146-153. |
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| 作者姓名： | 许荣涛 钟章队 陈建谋 |
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| 作者单位： | [1]北京交通大学轨道交通控制与安全国家重点实验室,北京100044 [2]台湾华夏技术学院资产与物业管理系,台湾台北 |
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| 基金项目： | 国家自然科学基金项目资助（60971124,60830001）;轨道交通控制与安全国家重点实验室自主课题资助（RCS2009ZT006） |
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| 摘 要： | 对两发送天线MIMO系统在相关瑞利和莱斯信道下V—BLAST检测算法的性能进行了分析，推导出最优和固定检测两种方案中第一步和第二步的误码率．相对于独立同分布瑞利信道，考察了相关瑞利信道和莱斯信道对接收信噪比的影响；相对于固定检测方案，讨论了最优检测算法对信噪比的提升．理论分析和仿真结果表明，瑞利信道相关性或莱斯信道的直达波分量会减弱最优检测方案对信噪比的提升．
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| 关 键 词： | 多输入输出天线系统 垂直空时结构 最优检测顺序 复Wishart分布 |
Study of V-BLAST MIMO Systems with Two Transmit Antennas Over Fading Channels |
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| Institution: | XU Rongtao, ZHONG Zhangdui, Jiann-Mou Chen (1. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, 100044 China; 2. Department of Assets and Property Management, Hwa Hsia Institute of Technology, Taipei Taiwan) |
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| Abstract: | The performance of vertical Bell Labs Space-Time （V-BLAST） algorithms for the MIMO systems with two transmit antennas is analyzed over correlated-Rayleigh channel and Rieian channel. We derive the analytical bit error rates （BERs） of the first and second detection steps for both optimal and fixed detection ordering schemes. We also investigate the signal-to-noise ratio （SNR） degradation of the detection steps for correlated-Rayleigh and Rician channels over an independent and identically distributed （i. i. d. ） Rayleigh channel. Afterwards, the effect of optimal ordering on the SNR improvement over fixed detection ordering has been discussed. Results have shown that the correlation or line-of-sight component reduce the SNR improvement of optimal ordering in the first step, whereas the correlation have no effect on the performance of the second step for a correlated-Rayleigh channel. |
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| Keywords: | multiple-input multiple-output vertical BLAST optimal detection ordering complex Wishart distribution |
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