雷达低空目标跟踪的偏差补偿算法研究

在单脉冲测角体制下,由于多径效应的影响,极大地降低了雷达目标的跟踪精度,甚至丢失该目标.本文主要通过理论分析和对实际环境的计算仿真,分析了岸、海基雷达跟踪低空运动目标时俯仰角测量误差大小及其产生原因.针对固定偏差补偿法在实际应用中的不足,提出了从复单脉冲比中估计反射路径与直接路径信号的相对相位的算法,从而实现联合相位的动态补偿,并在跟踪滤波中利用估计相位作为阀值来去除尖峰误差,在仿真中获得了良好的跟踪结果.

Bias Compensation Research for Low-Altitude Target Tracking

This paper deals with the measurement error of elevation angle for low-altitude target tracking with monopulse radars in the presence of multipath, which degrades the target tracking algorithms greatly. By means of the theoretical analysis and computer simulation based on real environment,we confirm that the fixed bias compensation can't solve some real scenarios' problem.Then we develop a novel compensation technique after the estimate of phase difference between direct and reflective path. Also, we can use it as a threshold to eliminate the peak error in the tracking stage. Complex monopulse ratio is utilized and the accuracy of tracking is improved,especially in some kinds of scenarios .