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为了在高速运动的载体上实现相控阵天线阵列波束始终对准卫星方向,对相控阵卫星自跟踪系统的总体框架和主要信号处理过程给出了说明。闭环跟踪滤波包括角度估计和跟踪滤波两个步骤,是卫星跟踪系统的核心处理模块,系统采用二维比相测角算法得到角度的估计值传人跟踪滤波算法中,将跟踪所得角度作为下一次测角的输人参数以形成闭环跟踪。研究了卡尔曼滤波、α-β滤波以及自适应α-β滤波三种跟踪滤波算法,给出坐标变换和野值剔除的方法,对于不同跟踪滤波方法下的系统跟踪精度给出仿真对比,并分析了不同场景下的α-β滤波算法性能。仿真结果表明:α-β滤波具有较高的跟踪精度,可以运用到高速移动的自跟踪系统。
In order to realize that the phased-array antenna array beam is always aligned with the satellite direction at a high-speed moving carrier, the overall framework of the phased array satellite self-tracking system and the main signal processing are given. Closed-loop tracking filter, including angle estimation and tracking filter two steps, is the core of the satellite tracking system processing module, the system uses two-dimensional phase angle measurement algorithm to get the angle of the estimated value of people tracking filter algorithm, the tracking angle as the next test Angle input parameters to form a closed-loop tracking. The three tracking filtering algorithms, Kalman filter, α-β filter and adaptive α-β filter, are studied. The methods of coordinate transformation and outlier removal are given. The simulation accuracy of the system under different tracking filtering methods is given. The performance of α-β filtering algorithm in different scenarios is analyzed. Simulation results show that α-β filter has high tracking accuracy and can be applied to self-tracking system with high-speed moving.