Title :
An approach to improve the image quality in Doppler beam sharpening
Author :
Yun, Zhang Jian ; Deshu, Liu
Author_Institution :
Electron. Eng. Inst., Hefei, China
Abstract :
In Doppler beam sharpening (DBS), an effective approach to eliminate correlated speckle is uncorrelated accumulation of several images in the azimuth dimension. However, if the centroid of the images to accumulate has a registration error, the uncorrelated accumulation will have azimuth ambiguity. In order to reduce the azimuth ambiguity, an approach to smoothing the Doppler centroids estimated from the radar returns on both the azimuth and the range dimension is presented. Simulation results demonstrate that the approach improves the image quality noticeably
Keywords :
Doppler radar; correlation methods; image enhancement; image registration; interference suppression; radar imaging; radar interference; smoothing methods; speckle; Doppler beam sharpening; azimuth ambiguity; azimuth dimension; centroid; correlated speckle; image quality; radar returns; range dimension; registration error; smoothing; uncorrelated accumulation; Airplanes; Azimuth; Doppler radar; Image quality; Matched filters; Radar antennas; Radar imaging; Receiving antennas; Spaceborne radar; Speckle;
Conference_Titel :
Radar, 1996. Proceedings., CIE International Conference of
Conference_Location :
Beijing
Print_ISBN :
0-7803-2914-7
DOI :
10.1109/ICR.1996.574493
