基于卫导的旋转角度测量和旋转解调技术研究

Research on Rotation Angle Measurement and Rotation Demodulation Technology based on Satellite Navigation

摘要:

针对旋转载体接收信号幅度变化和载波相位变化导致卫星导航信号不易同步的问题,提出了基于传统锁相跟踪环路的旋转解调环路系统架构,对旋转角度测量、天线分集以及旋转相位解调等关键技术进行了研究：通过采用基于锁相环的旋转角跟踪环路,实现了旋转角的实时测量；采用了天线分集技术和旋转相位解调技术,补偿了旋转引入的相位变化量和旋转引入的天线相位缠绕量,提高了旋转载体卫星导航的跟踪精度；通过仿真分析,验证了所提旋转角测量技术、天线分集技术及旋转相位解调技术的有效性。

Abstract:

In order to solve the problem that the satellite signal received by rotating carrier is not easy to synchronize due to the change of received signal amplitude and carrier phase, the key technologies such as rotation angle measurement, antenna diversity and rotation phase demodulation are studied: The real-time measurement of rotation angle is realized by using the rotation angle tracking loop based on PLL. The antenna diversity technology and the rotating phase demodulation technology are used to compensate the phase change introduced by rotation and the antenna phase winding introduced by rotation, which improves the tracking accuracy of the rotating carrier satellite navigation. Through simulation analysis, the effectiveness of the proposed rotation angle measurement technology, antenna diversity technology and rotation phase demodulation technology is verified.