3D Near-field Fast Imaging Method for MMW MIMO Array Radar

This paper proposes a three dimensional (3D) fast imaging algorithm for multiple inputs and multiple outputs (MIMO) array radar based on 3D wavenumber support domain approximation. Firstly, the MIMO array radar system and echo signal model are introduced and extended into the wavenumber support domain form. Then, the Born approximation theory of 3D wavenumber support domain of reference point for MIMO array is established to fast imaging. Based on that, the 3D fast imaging results with reference points of different sub-scenes are splicing and fusing to reconstruct the fine imaging result to eliminate the distortion and defocus caused by the approximation phase error. Finally, a real imaging experiments are conducted with a millimeter-wave MIMO array near field imaging system to demonstrate the performance and feasibility of the proposed algorithm.