针对室内外无线传播环境,提出一个三维几何散射体信道模型,假设散射体分布在一个椭球体内,移动台和基站分别位于椭球的两个焦点处.描述波达信号在空间和时间上的统计分布特性,推导出波达信号在方位角平面和仰角平面到达角度(angle of arrival,AOA)概率密度函数(probability density functions,PDF)的解析表达式,研究信号到达时间(time of arrival,TOA)的概率密度函数.数值仿真结果与一些存在的2D模型和可测量数据对比,比较结果表明,该模型的信道参数估计结果符合理论和经验,拓展了室内外3D空间统计信道模型的研究.%To model the indoor and outdoor wireless propagation environments effectively,a three dimensional geometrical scattering channel model was introduced based on the assumption that the scatterers are distributed within a spheroid,in which the mobile station and base station are located at the spheroid's foci.Both the spatial and temporal statistical distributions of the received multipath signals were captured.Several angle of arrival (AOA) and time of arrival (TOA) probability density functions of the received multipath signals were provided in compact forms.To validate the model,it was compared against some of the available two dimensional models and measured data.To some extent,such model is more agreed with the theory and experience and enriches the research of three dimensional statistical channel models.
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