宏蜂窝环境下3D非对称几何信道模型研究

Study of 3D asymmetric geometrical channel models in a macrocell environment

宏蜂窝环境下提出3D非对称几何信道模型.移动台MS位于3D散射区域半椭球的中心,基站BS采用方向性天线,辐射到椭球左右两部分的波束宽度不相等,导致MS端的空间特性是非对称的.该模型利用空间几何关系,分别推导出BS端和MS端到达角、到达时间的概率密度函数、累积分布函数的闭环表达式.通过Matlab仿真,绘制出信道参数统计图形,扩展了信道模型的研究渠道和应用.

A 3D asymmetric geometric channel model is proposed in a macrocell environment. The mobile station（ MS） is located in the semi-ellipsoidal center of the 3D scattering area. The directional antenna（ DA） is used in the base station（ BS）,and the beam widths（ BW） radiated to the left and right parts of the ellipsoid are not equal,resulting in the asymmetry of the spatial characteristics of the MS. Taking full advantage of the relationship of the spatial geometry,the closed-loop expressions of the probability density function（ PDF） and the cumulative distribution function（ CDF） of the angle of arrival（ Ao A） and the time of arrival（ TOA） at BS and MS are deduced. Using Matlab simulation,the statistical graphics of the channel parameters are drawn out,which enrich the research and applications of channel model.