A new auto-focus algorithm for inverse synthetic aperture radar (ISAR) imaging

Autofocus is imperative for inverse synthetic aperture radar (ISAR) imaging. In this paper an approach for ISAR autofocus is developed by use of second order statistics (SOS) of returned signals. The ISAR observation model is established, the approach is verified and the relationship of the developed approach to other methods is investigated. The results of processing real data confirm the validity of proposed approach.