大规模多天线无线信道及容量特性研究

Research on the propagation condition and channel capacity for Massive MIMO

基站端配置大量天线构成的大规模多天线系统,可以进一步挖掘空间域增益,大幅度提升无线通信系统传输容量和功率效率.从理论上看,大规模多天线系统获得空间域增益的前提条件是传播环境中的各子信道满足正交条件.准确的获取无线信道信息是通信系统研究的基础,它为通信系统的链路级仿真、样机试验和标准制定提供理论基础和技术支撑.本文研究了大规模多天线无线信道的特点,总结了国内外大规模无线信道的测量与建模,通过随机矩阵特征值经验概率密度函数角度研究了Massive MIMO无线信道的信道容量,并给出了球面波信道建模和阵列域的相关性与非平稳特性为下一步的两个研究方向.

The massive multiple input and multiple output （Massive MIMO） system equipped at the base station can provide remarkable space diversity which improves the system capacity and the power efficiency. Theoretically, the premise of the diversity from Massive MIMO system is the or-thogonali- ty between the sub-channels. The accurate channel knowledge is the basic condition of wireless com- munication, as it can provide the theory and technical support for the link simulation, prototype imple- mentation and standardization. In this paper, we investigate the properties of Massive MIMO chan- nel, and then channel measurement and characterization of massive MIMO are reviewed. Meanwhile, the channel capacity and singular value distribution of Massive MIMO are studied. The future research direction is provided at the end.