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Cubic-phase function evaluation for multicomponent signals with application to SAR imaging

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7 Author(s)
I. Djurovic ; Electrical Engineering Department, University of Montenegro, Cetinjski put bb, Podgorica 81000, Montenegro ; C. Ioana ; T. Thayaparan ; L. Stankovic
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A cubic-phase function evaluation technique for multicomponent frequency-modulated signals with non-overlapped components in the time-frequency (TF) plane is proposed. The proposed technique is based on the short-time Fourier transform. Cross-terms are removed or reduced in the same manner as in the case of the TF representation called the S-method. The proposed technique is applied for visualisation of signals in time-chirp-rate plane and parameter estimation of analytical and radar signals. In addition, a procedure for focusing SAR images by using estimated parameters is proposed in order to verify obtained results.

Published in:

IET Signal Processing  (Volume:4 ,  Issue: 4 )