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Coherently integrated cubic function based Doppler parameters estimation for moving-target imaging

A novel moving target imaging algorithm is proposed based on coherently integrated cubic phase function (CICPF) for synthetic aperture radar (SAR) system. The CICPF algorithm can solve the identifiability problem caused by cubic phase function (CPF) when dealing with multicomponent signals. Moreover, the CICPF algorithm can estimate the parameters of multicomponent signals without searching procedures and can acquire high anti-noise performance due to its coherent accumulation procedure. With estimated Doppler parameters, high-quality imaging for moving targets can be obtained. Experimental results demonstrate the effectiveness of the proposed algorithm.