低轮廓动中通极化稳定控制系统分析

针对动中通接收中出现的极化稳定问题,分析了双极化复用信号极化失配原因及产生的影响。提出了通过极化陀螺和移相网络实现的极化稳定方案,这是当前某些国外公司采用的方法,但是其造价高,难实现。在深入研究之后,提出了自适应递推加权系数的变极化控制方案,利用信号自身信息来达到控制目的。仿真结果表明能够较好地实现极化稳定,适应于低成本动中通。

Analysis of polar-stabilizing control system of sat-com on the move

In order to solve the polar-stabilizing problem of the sat-com on the move, the polarization mismatching factor of receiving dual -polarized satellite signal for sat -com on the move caused from its high motion is discussed. Two methods are put forward, and one is to make it by using polar -gyro and phase -shifting network which is now employed by many foreign compa- nies. However, it is costly and difficult to implement. The other is supposed to use the information of the signal itself, which ap- plies adaptive recursive-estimation algorithm. The results of modulation indicate it is feasible to be used in sat-com on the move.