低散射目标RCS测试中的多域杂波消除方法

Multi-domain Clutter Elimination Method in RCS Measurement for Low Scattering Target

摘要:

针对现场复杂环境下低散射目标雷达散射截面积（radar cross section,RCS）精确测试需求，提出了一种基于空-时-频多域处理的杂波消除方法。采用逆合成孔径雷达（inverse synthetic aperture radar,ISAR）成像、距离门选通滤波、多通道干涉成像等方法消除了测试环境中的固定背景杂波、多路径杂波、目标与地面耦合杂波的影响。试验结果表明，所提方法实现了复杂环境下低散射目标RCS的精确测试，可为大型低散射目标RCS的现场评测提供支撑。

Abstract:

According to the precise measurement requirement of radar cross section (RCS) for low scattering targets in complex on-site environment, a clutter elimination method based on spatial-temporal-frequency multi-domain processing was proposed. By employing inverse synthetic aperture radar （ISAR） imaging, distance gate selective filtering and multi-channel interferometric imaging，the proposed method efficiently eliminated the effects of fixed background clutter, multipath clutter, target-ground coupled clutter.Experimental results show that the proposed method achieves high precision RCS measurements for low scattering targets in complex environments, providing support for on-site RCS evaluationof large low scattering targets.