A NUFFT-Based Frequency-Domain Imaging Algorithm for Single-Input Non-Uniform Multiple-Output Array

As a more general Single-Input Multiple-Output array, Single-Output Non-Uniform Multiple-Input arrays are rarely studied. In this regard, this paper proposes a frequency domain imaging algorithm based on Non-Uniform Fourier transform, which uses non-uniform Fourier transform technology to transform the spatial signal received by radar to frequency domain for three-dimensional imaging processing. The simulation results show that the proposed algorithm can obtain imaging resolution and Peak Side Lobe Ratio similar to the BP algorithm, but the imaging time is much shorter than that of the BP algorithm.