Abstract
In high frequency region, the scattering response of an extended target can be well approximated as a sum of responses from individual scattering centers. The spatially variant point spread function (PSF) of MIMO radar near-field imaging system makes it difficult to extract scattering centers. Based on the spatial wavenumber support domain of the MIMO radar, this paper proposes a spatially variant Relax (SV-Relax) algorithm for its scattering center extraction. The spatial wavenumber support domain of the MIMO radar is firstly analyzed. Then the process of the SV-Relax algorithm is discussed in detail. Finally, both numerical and measured data are processed to demonstrate the validity of proposed algorithm.
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