R^M陆地移动卫星信道模型

R^M channel model for land mobile satellite

提出一种部分阴影下的新的陆地移动卫星信道幂指数统计模型.根据环境的阴影程度,接收信号的幅度可以划分为多个状态.提出部分阴影下的衰落模型是非阴影和全阴影下的模型的新的线性组合.A定义为阴影因子,它反映环境的阴影程度,阴影程度加深,A值增大.接收信号的幅度(分贝)期望值与非阴影和全阴影下的幅度(分贝)的期望值成线性关系.调整因子A可以灵活地仿真接收信号的幅度.仿真结果证明模型是正确的.

A new R^M statistical model in the partial shadowed for the land mobile satellite channel is proposed. The received amplitudes were classified into several states according to the degree of shadowed experimented. Partial fading model of received signal proposed is a new combination between the total shadowed and non-shadowed based on the factor A is related to shadowed and other environmental factors. The relationship among the expectations （in dB） of received signals, non-shadowed and total shadowed is linear relation and the expectation of received signals （in dB） is in direct proportion to A. Tuning the factor A is flexible to simulate the received signals. Comparison demonstrates the fading model is valid.