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MIMO信道容量公式及其渐近界

DOI: 10.13190/jbupt.200606.72.241, PP. 72-76

Keywords: 多入多出,信道容量,衰落信道,特殊函数,特征值分布

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Abstract:

研究了当发射机未知而接收机已知信道状态信息时,独立同分布的多入多出(MIMO)平坦瑞利衰落信道的各态历经信道容量。首先,利用Wishart矩阵的特征值分布,导出了一个简单闭合的MIMO信道容量公式;然后基于此公式,得到了MIMO信道容量在高信噪比时的渐近界,解析地反映了随着信噪比的逐渐增加,MIMO信道容量与信噪比(以dB为单位)和收发天线数目的最小值呈渐近的线性关系;最后,计算机仿真验证了所提出的MIMO信道容量公式及其渐近界的正确性。

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