宏蜂窝环境下BS端采用DA的3D GCM研究

Study of 3D GCM for Macrocell Environment Using Directional Antenna at BS

基于2D信道模型,提出3D统计信道模型。宏蜂窝环境中,基站(BS)端采用定向天线阵列,散射体分布在以移动台(MS)为中心的椭圆盘上,BS在椭圆平面之外。该模型通过几何关系,估算出水平方向及垂直方向到达角、到达时间的概率密度函数、累积分布函数和移动台的移动产生BS端的相对多普勒谱。通过仿真分析,揭示该模型空间参数及定向天线波束宽度对信道模型造成一定的影响,并将结果与经典的Nawaz、Janaswamy和Clarke模型进行对比。结果表明:该模型符合理论及实际的通信环境,扩展了现有三维统计信道模型的研究。

Based on the 2D channel model,a3D statistical channel model is proposed.In a macrocell environment,a base antenna (BS) end employs a directional antenna array,and scatterers are distributed on an elliptical disk centered on a mobile station (MS),and the BS is outside the elliptical plane.The model estimates the horizontal and vertical arrival angles,the probability density function of the arrival time,the relative Doppler spectrum at the BS end produced by the cumulative distribution function and the movement of the mobile station.Through simulation analysis,the spatial parameters of the model and the directional antenna beamwidth are revealed to have a certain impact on the channel model,and the results are compared with the classic Nawaz,Janashwamy and Clarke models.The results show that the model conforms to the theoretical and practical communication environment and extends the existing three-dimensional statistical channel model research.