The mechanism of Doppler frequency shifts resulted from variations and movement of ionosphere is analysed, and a general model for the ionosphere involving several factors is assumed.

本文分析了电离层的变化和运动引起多普勒频移的物理机制，假定了一个包含多种因素的电离层模型。

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Based on the ITS channel model this paper theoretically discusses the fading effect of the ionosphere to the signal which is reflected by the ionosphere.

在宽带信道模型的基础之上，从理论上分析了电波信号通过电离层信道所经受的衰落影响。

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Furthermore, the background ionosphere model is very important factor in the filed of ionosphere reconstruction.

也表明了背景电离层模型在电离层重构中的重要作用。

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