An imaging method of maneuvering target based on hybrid sampling

Estimating motion parameters of the maneuvering target is a difficult thing currently for most of airborne synthetic aperture radar (SAR) due to the complex motion, which usually results into a defocus-blurred SAR image of the target. To avoid the difficulty, this paper proposes a high-resolution imaging method via airborne multiple-input and multiple-output (MIMO) radar based on a hybrid sampling procedure, where the single snapshot of MIMO radar and the synthetic aperture of SAR are combined. Different from the classical SAR, the novel method only compensates the movement by the geographic information between the target and the airborne radar, not need of the Doppler information. Therefore, the difficulty associated with the Doppler estimation in SAR imaging procedure can effectively be avoided. Simulation results prove the availability of the proposed algorithm for the maneuvering target imaging.