Adaptive local polynomial fourier transform in ISAR

Authors:
Igor Djurović;Thayananthan Thayaparan;Ljubiša Stanković
Affiliations:
Electrical Engineering Department, University of Montenegro, Podgorica, Serbia and Montenegro;Department of National Defence, Defence R & D Canada - Ottawa, Ottawa, ON, Canada;Electrical Engineering Department, University of Montenegro, Podgorica, Serbia and Montenegro
Venue:
EURASIP Journal on Applied Signal Processing
Year:
2006

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Abstract

The adaptive local polynomial Fourier transform is employed for improvement of the ISAR images in complex reflector geometry cases, as well as in cases of fast maneuvering targets. It has been shown that this simple technique can produce significantly improved results with a relatively modest calculation burden. Two forms of the adaptive LPFT are proposed. Adaptive parameter in the first form is calculated for each radar chirp. Additional refinement is performed by using information from the adjacent chirps. The second technique is based on determination of the adaptive parameter for different parts of the radar image. Numerical analysis demonstrates accuracy of the proposed techniques.