移动通信室内外空间几何信道模型的分析与比较

针对频率非选择性无线多径衰落信道，基于室外通信环境下的空心圆模型，提出了一种改进的适应于室内通信环境的空心圆模型。通过推导接收信号的空时联合分布以及边缘分布概率密度函数，分析和比较了两种空心圆几何信道模型的空时统计特性。通过空心圆的空心率以及收发机间距的信道参数变化，仿真结果阐明了空心圆模型在圆盘模型和圆环模型之间过渡的变化机理，以及不同无线通信环境下的信道信息。

Analysis and comparisons of geometrical-based spatial channel models for indoor and outdoor wireless propagation environments

For the frequency non-selective wireless multipath fading channel, an improved hollow-disc model is proposed for indoor communication environments based on the hollow-disc model for outdoor communication environment. The joint and marginal probability density function(PDF) of angle of arrival(AOA) and time of arrival(TOA) are derived in closed-form expressions. The spatial and temporal statistical properties of these two hollow-disc models are analysed and compared. By varying the hollow-disc ratio and the distance between base station and mobile station, simulations illustrate the variation mechanism when hollow-disc models transits from the circle-disc to ring model, and channel information under different wireless communication environments.