Title :
Modified Doppler centroid tracking method for phase compensation in ISAR
Author :
ZhaoDa, Zhu ; Xiaohui, Qiu ; Zhishun, She
Author_Institution :
Nanjing Univ. of Aeronaut. & Astronaut., China
Abstract :
The modified Doppler centroid tracking (MDCT) method is developed which applies the phase gradient autofocus (PGA) algorithm developed by Wahl (1994) to improve the Doppler centroid tracking (DCT) method for the phase compensation in inverse synthetic aperture radar (ISAR). It can smartly eliminate the effect of the rotational phase component (RPC) on the estimation of the translational phase component (TPC) by circular shifting, windowing and iteration steps. After several iterations, the maximum likelihood estimation and compensation of the TPC of the target can be realized more effectively. The processing results of live data show that the proposed method can improve the imaging quality of ISAR significantly
Keywords :
Doppler radar; inverse problems; iterative methods; maximum likelihood estimation; motion compensation; phase estimation; radar imaging; radar tracking; synthetic aperture radar; ISAR imaging; circular shifting; imaging quality; inverse synthetic aperture radar; iteration; maximum likelihood estimation; modified Doppler centroid tracking method; phase compensation; phase gradient autofocus algorithm; rotational phase component; translational phase component; windowing; Discrete cosine transforms; Doppler radar; Electronics packaging; High-resolution imaging; Motion compensation; Phase estimation; Radar imaging; Radar scattering; Radar tracking; Target tracking;
Conference_Titel :
Radar, 1996. Proceedings., CIE International Conference of
Conference_Location :
Beijing
Print_ISBN :
0-7803-2914-7
DOI :
10.1109/ICR.1996.574604
