降雨环境中多输入多输出地-卫信道相关性研究

Correlation coefficient in the rainfall environment for satellite communications

利用随机介质中波传播理论研究了随机雨介质中信号的起伏特性,研究了降雨散射环境中,卫星通信多输入多输出(Multi-Input Multi-Output,MIMO)信道相关性对多径信道的影响,导出了降雨环境下接收端天线相关系数和发射端天线相关系数的计算公式,并对发射端相关系数和接收端相关系数作了进一步讨论.结果表明:降雨环境下,天线间距、发射频率、降雨率等因素对卫星通信MIMO系统相关系数有着重要影响.

Using the random medium wave propagation theory, we studied the characteristics of signal fluctuation in the rainfall scattering environment, and the effects on the multipath channel due to （multi-input multi-output, MIMO） channel correlation of satellite communications. We also deduced the formula for calculating the correlation coefficient between the receiving antennas and transmitting antennas in the rainfall environments. Then, we discussed the correlation coefficient ad vanced. The results show that the distance between antennas, the frequency, the rainfall rate and other factors have an important impact on the correlation coeffi-cient of MIMO system for satellite communications.