基于多天线的微蜂窝微波移动通信信道建模研究

Study of the Multi-Element Antenna Based Micro-Cellular Microwave Mobile Communication Channel Modeling

城市微蜂窝移动通信电波传播环境相当复杂,因此建立这种无线传播信道的有效模型无论对理论分析、系统优化设计以及网络工程规划来说都是非常重要的。特别是针对未来陆地蜂窝移动通信系统基于智能天线应用的规范标准要求尤其如此。为此从多径色散信道的特性分析出发,采用电磁散射理论建立了基于多天线的微蜂窝多输入多输出物理信道模型,对刻画信道特性的一些重要性能参数,如空间相关性、容量和时间演化等进行了研究和仿真分析。与有关文献结果的比较表明了所建立的微蜂窝移动通信信道模型的有效性。

In urban micro-cellular mobile communication scenarios, the radio propagation conditions are very atrocious. For this reason, it is important that establish an efficient radio propagation channel model for theoretical analyzing, system optimal design and networks planning. It is true, especially, for future land mobile cellular communications, in which the smart antennas will be invoked under the standard stated. With the review of the multi-path dispersion channels properties studies, the multi-input multi-output physical channel model based on the multi-element antenna has been derived using the electromagnetic scattering theory. Some crucial performance parameters for channels, such as spatial correlation, capacity, and time evolvement have been investigated and simulated. The results show that the presented model is validity for microcellular mobile communications, by comparing with those of the other literatures.