Ku频段车载“动中通”天线信号的遮挡检测及恢复方法

A Signal Occlusion Detection and Recovery Method for Ku Band Vehicle “on-the-move SATCOM” Antenna

针对Ku频段车载低成本"动中通"在运动过程中卫星信号受到障碍物遮挡,造成信号的部分丢失和全部丢失引起天线指向发生偏移的问题,本文根据惯导航向漂移规律与伺服电机正弦扫描控制算法,提出了一种基于MEMS惯导的车载"动中通"天线卫星信号遮挡检测及指向自适应恢复的方法.该方法分为四个阶段,其中第一、二阶段可以实现天线指向零等待恢复,第三阶段可以实现天线指向快速恢复,第四阶段为信号的初始捕获.本文给出了完整的实现方法与推导过程,实验证明该处理方法可以使系统应对任何遮挡状况,实现"动中通"天线的稳定跟踪.

In the course of movement of low cost vehicle ＂on-the-move SATCOM＂in the Ku band,the satellite signal is blocked by the obstacle,which causes the partial loss and total loss of the signal,and causes the deviation of the antenna pointing. In view of the problem,according to the drift rule of inertial navigation and sinusoidal scanning control algorithm of servo motor,a method of satellite signal occlusion detection and pointing adaptive recovery based on MEMS inertial navigation vehicle ＂on-the-move SATCOM＂was proposed.The method can be divided into four stages,stage one and stage two can correct the antenna pointing immediately,stage three can quickly correct the antenna pointing,stage four is the initial capture of the signal. In this paper,a complete implementation method and a derivation process are given while the method can be used to cope with any occlusion condition. The stable tracking has been realized.