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Autofocus for ISAR Imaging Using Higher Order Statistics

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2 Author(s)
Zhishun She ; Sch. of Sci. & Technol., Wales Univ., Wrexham ; Liu, Y.

Autofocus is imperative for inverse synthetic aperture radar (ISAR) imaging. In this letter, a new approach for ISAR autofocus is developed by using fourth-order statistics properties of the radarpsilas return signal. After the ISAR signal model is established, the approach is described. The results of processing real data confirm the effectiveness of the proposed approach and show its capability for suppressing noise. The developed approach has a numerical stability and a smaller computational load compared with the maximum image contrast and the minimum image entropy methods.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:5 ,  Issue: 2 )