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矿井巷道电波传播环境非常复杂,建立MIMO无线信道模型有助于将无线通信技术应用到煤矿井下。针对矿井巷道中MIMO无线传输环境,提出一种随机独立的MIMO信道,然后根据矿井巷道的富散射环境,对该信道矩阵进行修正,建立了两种空间相关的MIMO信道模型。文章对包含完全独立路径的瑞利信道模型的奇异值和信道容量进行了分析比较,并对不同信道模型下的系统性能进行了仿真。仿真结果与文献的实测结果对比说明建立的模型不失一般性。
Mine roadway radio propagation environment is very complex, the establishment of MIMO wireless channel model is conducive to the wireless communication technology applied to the coal mine. Aiming at the MIMO wireless transmission environment in mine roadway, a random and independent MIMO channel is proposed. Then the channel matrix is modified according to the rich scattering environment of mine roadway, and two spatially correlated MIMO channel models are established. In this paper, the singular values and channel capacities of Rayleigh channel models with completely independent paths are analyzed and compared, and the system performance under different channel models is simulated. The comparison between the simulation results and the measured results shows that the established model has no loss of generality.