A fast stepped-frequency chirp radar imaging method based on NuFFT

A fast matched-filtering imaging method is presented based on non-uniform fast Fourier transform (NuFFT) for stepped-frequency chirp radar imaging. Multiple point scatters are selected in the scene and SNR of them are calculated. Moreover, traditional imaging methods are analysed and compared with the method in the study. Imaging results show obvious advantages of the method. Computational complexity is also analysed. Finally, the simulation results are utilized to validate the feasibility and effectiveness of the proposed method.