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为提高电磁信号的到达角度以及多普勒效应等信道参数估计的准确性,在散射体非均匀分布下引入了散射概率和有效散射体两个物理概念,提出一种合理的改进型空间信道模型,该模型能准确地描述宏小区(macrocell)和微小区(microcell)等各种移动通信环境下的重要空时信道参数,并应用于多入多出系统(multiple input multiple output,MIMO)信道性能仿真中.数值仿真结果与早期多径衰落信道模型对比,表明本模型的信道参数估计结果符合理论和经验,拓展了空间统计信道模型的研究和应用,对评估多天线MIMO系统空时处理算法和仿真无线通信系统提供有力的工具.
In order to improve the accuracy of channel parameters estimation such as the arrival angle of electromagnetic signals and Doppler effect, two physical concepts of scattering probability and effective scatterer are introduced under the non-uniform distribution of scatterers. A reasonable improved spatial channel model , The model can accurately describe the important space-time channel parameters in various mobile communication environments such as macrocell and microcell and apply to multiple input multiple output (MIMO) channel performance Simulation results show that the proposed channel parameter estimation conforms to the theory and experience, and the research and application of spatial statistical channel model are expanded. Compared with the earlier multipath fading channel model, Simulation of wireless communication systems provide a powerful tool.