非静止移动卫星通信中两种信道模型的等同性

Equality of two channel models in nongeostationary mobile satellite communication

比较了非静止移动卫星信道的两种包络统计模型，基于两种信道模型的机理，推导出了两种模型参数间的关系表达式．累积分布的结果表明，这种推导方法不仅简单、准确，而且具有一定的实际意义．同时也证明了部分阴影模型同样也可用于非静止移动卫星通信中，阴影对散射分量的影响处于次要地位。

A comparsion is made of the statistical models of received signal envelope through nongeostationary mobile satellite channel. The relations between the parameters are obtained, which are based on the mechanism of the two models. The results of cummulative distribution with these parameters show that the derivation method is simple and reasonable, but useful in practice. Meanwhile, it demonstrates that partial shadowing model can be used in nongeostationary mobile satellite communication, and the effects caused by shadowing are negligible, especially when elevative angle is large.