Multiple Snapshot Forward-Looking Superresolution Imaging of Coprime Array Radar

Conventional array radar systems require element spacing to be less than half a wavelength to mitigate grating lobes in forward-looking image, which results in a large number of elements and imposes a significant hardware burden. In this paper, an equivalent virtual uniform linear array is formulated with differential visualization technique and multiple snap-shot data. Then the regularized iterative adaptive approach (RIAA) is adopted to achieve superresolution imaging of the virtual linear array. Simulation results are given to illustrate the effectiveness of the proposed scheme.