一种低轨卫星通信终端的数字波控方法

A Digital Beam Steering Method for Tracking LEO Satellites on Ground Terminal

针对低轨卫星通信场景下地面终端需自动追星的问题,提出了基于相控阵的波束控制方法。首先利用卫星的位置以及终端的位姿信息计算终端对星的初始指向角,并用该指向角计算相控阵各阵元的移向量完成初始对星,然后利用相控阵在数字域进行圆锥扫描实现对星的精跟踪。仿真结果表明,所提方法能较好完成终端的对星工作。

To track low Earth orbit(LEO)satellite automatically using ground terminal,a digital beam steering method based on phased array is proposed.Firstly,the direction angle can be calculated from the position of LEO satellite and the pose of terminal,and the phase shift of each array element can be calculated according to the direction angles for preliminary alignment.Then,the accurate tracking of the satellite can be realized using digital conical scanning.Simulation results show that satellite tracking can be well done with this method.