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当目标卫星被遮挡,或天线波束指向偏差较大时,卫星通信质量会变差,甚至导致卫星通信中断。针对卫星动中通阴影和天线波束指向偏差的问题,建立了一种综合考虑地理环境和波束指向偏差的接收信号功率模型,提出了一种基于接收信号强度特征参数的阴影判断和天线波束指向偏差估计方法,方法充分利用了卫星动中通信道特性,适用于接收信号的快变化和慢变化两种情况。当出现个别较大指向偏差值时,模型能够有效降低误差影响。最后给出了实验仿真结果,验证了该方法的有效性。
When the target satellite is obscured, or the antenna beam pointing deviation is large, the satellite communication quality will deteriorate, and even led to the interruption of satellite communications. Aimed at the problem of the satellite moving through shadow and antenna beam pointing deviation, a power model of received signal considering the geographical environment and beam pointing deviation is established. A shadow judgment and antenna beam steering deviation based on the received signal strength characteristic parameters are proposed The estimation method and method make full use of the characteristics of the satellite moving communication channel, which is suitable for both fast and slow changes of the received signal. The model can effectively reduce the impact of errors when some large deviation values appear. Finally, the experimental simulation results are given to verify the effectiveness of the method.