基于杂波特征评估的雷达目标点迹过滤方法

雷达在目标检测和跟踪时常面临地杂波、海杂波、气象杂波等复杂强杂波的干扰, 而雷达回波信号经过传统的动目标显示( MTI)和恒虚警( CFAR)检测处理后的剩余杂波, 在距离-时间(脉冲)上的二维分布与目标非常相似, 无法区分。对此, 提出一种基于杂波综合特征评估的雷达目标点迹过滤方法, 综合考虑目标与杂波在幅度起伏、距离/俯仰/方位相关性、相位变化等多维特征的不同, 利用综合特征因子评估区分目标和杂波。最后, 利用雷达实测数据对所提方法进行验证。结果表明, 杂波有效抑制率较传统方法有显著提升。

Abstract

The detection and tracking process of radar targets are often interfered by ground clutters, sea clutters and whether clutters. After the traditional Moving Target Indication(MTI) filtering and Constant False Alarm Rate(CFAR) detection, the residual clutters have almost the same two-dimensional distribution(range-time) as the target, and it is difficult to distinguish them. To solve this problem, a plots filtering method for radar targets based on clutter feature evaluation is proposed. Synthetically considering the difference of features in amplitude fluctuation, distance/pitch/orientation correlation and phase shifts, comprehensive feature factors are evaluated to distinguish radar targets from clutters. Finally, the proposed method is verified by using the real radar measured data, which indicates that the effective suppression rate of clutters is significantly higher than that of traditional methods.

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史建涛, 杨予昊, 孙俊, 王宁. 基于杂波特征评估的雷达目标点迹过滤方法[J]. 太赫兹科学与电子信息学报, 2019, 17(6): 988. SHI Jiantao, YANG Yuhao, SUN Jun, WANG Ning. A plots filtering method for radar targets based on clutter feature evaluation[J]. Journal of terahertz science and electronic information technology, 2019, 17(6): 988.

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