Global range alignment for ISAR

作者：Junfeng Wang, Dayalan P. Kasilingam · 发表于：IEEE Transactions on Aerospace and Electronic Systems · 年份：2003 · DOI：10.1109/taes.2003.1188917 · 被引用次数：262 · 研究领域：Advanced SAR Imaging Techniques、Microwave Imaging and Scattering Analysis、Synthetic Aperture Radar (SAR) Applications and Techniques

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.