Improved method of the clutter lock for circular scanning imaging radar

The accuracy and the stability of the traditional method estimating the Doppler centroid frequency of Circular Scanning Radar data for the clutter lock is not high enough and the estimation result will eventually degrade the quality of the radar image and affect its later applications. In this paper, we propose an improved method that suits to the circular scanning imaging radar. The method bases on the characteristics of the Doppler centroid frequency of Circular Scanning Imaging Radar, conquers the bad influence some error estimation results brings and improves the accuracy and the stability of the Doppler centroid frequency. The effectiveness of this method has been demonstrated by experimental results and the emulational results.