矿井巷道的MIMO信道几何模型及其信道容量分析

摘要

多输入多输出(MIMO)技术可以有效提高各种无线衰落信道的信道容量.通过建立矿井巷道环境下MIMO信道的几何模型,推导了该信道模型的空时相关函数,并对矿井下MIMO信道容量进行了数值仿真.仿真结果表明:矿井巷道中空间相关性对MIMO系统容量的影响很大,增加接收端天线数量、增大天线间距和采用自适应功率分配策略可以提高矿井巷道中MIMO系统的信道容量.%Multiple-input multiple-output (MIMO) can effectively improve channel capacity of various wireless fading channel.Geometric model of MIMO channel in mine tunnel is established.A space-time correlation function is derived from this model and MIMO channel capacity in mine is simulated.The results indicate that capacity of mine MIMO system is primarily depended on spatial correlation of mine roadway,increasing the number of receiver antennas or the antenna spacing and with adaptive power allocation strategy it can improve channel capacity of MIMO system in mine tunnel.