Title :
Global range alignment for ISAR
Author :
Wang, Junfeng ; Kasilingam, Dayalan
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, North Dartmouth, MA, USA
Abstract :
A new technique is developed for range alignment in inverse synthetic aperture radar (ISAR) imaging. The shifts made to the echoes are modeled as a polynomial, and the coefficients of this polynomial are chosen to optimize a global quality measure of range alignment. This technique is robust against noise and target scintillation, and avoids error accumulation. In addition, the shift in the time domain is implemented by introducing a phase ramp in the frequency domain, which removes the limitation of integer steps.
Keywords :
polynomials; radar imaging; radar theory; synthetic aperture radar; echo shift; frequency domain; global range alignment; inverse synthetic aperture radar imaging; noise; phase ramp; polynomial model; target scintillation; time domain; Fourier transforms; Frequency domain analysis; Geometry; Inverse synthetic aperture radar; Noise robustness; Polynomials; Radar imaging; Radar scattering; Spaceborne radar; Synthetic aperture radar;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2003.1188917
