An improved procedure for ZDC reduction in high resolution imaging of rotating targets

Strong background clutter exists in many cases such as inverse synthetic aperture radar (ISAR) imagery of turntable objects, which results in severely corrupted images. This work mainly aims at the reduction of zero-Doppler clutter (ZDC) for fixed background in high resolution radar imaging of rotating targets. Existing signal processing techniques for ZDC suppression are first addressed. An improved procedure is developed to avoid the defects of existing techniques. Experimental results using outdoor range measurements are presented to demonstrate the usefulness of the proposed technique.