三维空时卫星移动信道概率统计模型

3-Dimension spatial-temporal satellite mobile channel probability statistical model

摘要:

针对卫星和带阵列天线的移动体之间视距链路被遮挡时的信道特性,综合考虑信号到达方向分布的三维非均匀、非全向来波情形,建立了一个基于几何圆柱散射模型的三维信道概率统计模型.分别以拉普拉斯分布与Parsons模型中改进的截尾余弦分布来描述电波到达方向的方位角和仰角的角谱分布,得到了接收信号的时间自相关函数和空间互相关函数的表达式.利用正弦波叠加法建立了理论分析模型的仿真模型,并用等面积法进行修正后用来确定了仿真模型的参数.通过Aulin模型对建立的理论分析模型及其仿真模型进行了验证.

Abstract:

Considering the channel characteristics when the line-of-sight(LOS) link between satellite and mobile terminal with array antenna is obstructed,a three dimensional channel statistical model based on the geometrical cylinder model was put forward under the circumstance of heterogeneous direction of arrival(DOA) at mobile terminals,in which the azimuth and elevation angular distribution of DOA was described according to Laplace distribution and modified truncated cosine distribution in Parsons model.Expression equations of correlation functions of received signal were also given in the paper.Simulation model was built up with Sum-of-Sinusoidal(SOS) method,and the related parameters were determined by modified equal area method(MMEA).The models have been verified with Aulin model.