In this paper, a new nonlinear frequency modulation (NLFM) waveform is developed that can be used as a transmitted chirp in synthetic aperture radar (SAR) imaging to improve the imaging quality compared to a linear frequency modulation (LFM) chirp signal. The new NLFM is constructed based on piecewise linear functions, which are optimized using multi-objective optimization. Different signal processing algorithms are investigated in order to use NLFM as the transmitted chirp in a SAR system. In addition, a modified motion compensation (MC) algorithm using navigation data is proposed for the range-Doppler algorithm. Strip-map SAR geometry is considered to generate a SAR raw signal, in order to validate the new offered chirp signal and the proposed MC algorithm.
Synthetic aperture radar imaging using nonlinear frequency modulation signal
IEEE Transactions on Aerospace and Electronic Systems ; 52 , 1 ; 99-110
2016-02-01
2123734 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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