A new method of denoising processing for synthetic aperture radar return signal

In this paper, a denoising processing method for synthetic aperture radar raw return signal is proposed based on the DFT-DWT transform. Compared with presented transforms of DFT and DWT, the DFT-DWT transform is more efficient to extract the SAR raw return signal which is a complex 2-D signal with different properties between the two directions. After removing the out-ofband and high-frequency part of the SAR return signal's DFT-DWT transform, the noise can be eliminated efficiently. Experimental results verify that the SAR denoising processing method has a practical value for suppressing the suppression jamming and detecting the weak targets.