关于动目标近距的杂波谱中心补偿

杂波谱中心补偿是机载雷达动目标检测的关键步骤。杂波谱中心的估计方法主要有两种:惯导估计法和回波数据估计法。对于机载雷达的动目标检测所运用的估计方法利用回波数据进行估计杂波谱中心,然后利用惯导估计的杂波谱中心进行解模糊操作。但是在5km近距的杂波谱中心发现,传统的回波数据方法—重心法估计、相关法估计,仍然会使动目标检测出地杂波,已经不能满足动目标检测的要求。本文针对实际雷达和实测数据,对近距动目标检测提出了新的杂波谱中心估计方法,对于动目标近距的检测结果有较大的改善。

Research on Clutter Spectrum Center Frequency Compensation for Close-in Moving Target Detection

Clutter spectrum center frequency compensation is a key step in moving target detection of airborne radar.There are two typical clutter spectrum center frequency estimation methods,namely inertial navigation estimation method and echo data estimation method.For moving target detection applications of airborne radar,the echo data estimation method is usually used at first to obtain center frequency estimation,and then the inertial navigation estimation method is used to resolve the ambiguity in the obtained center frequency estimation.However,traditional echo data estimation approach cannot remove all ground clutter in close-in(5m)moving target detection applications.This paper proposes a new clutter spectrum center frequency estimation method based on actual radar and measured data,which can improve the detection performance of airborne radar against close-in moving targets.