Clean processing for direct signal cancellation using sparse representation in passive synthetic Aperture Radar based on DVB-T Signal

This paper presents a new method of clean processing for cancelling direct signal from the reference channel signal using Sparse Representation (SR) in a Bistatic Passive Synthetic Aperture Radar (BPSAR) based on Digital Video Broadcasting - Terrestrial (DVB-T) signal, whose transmitter is stationary and receiver is moving. This paper develops the system model of BPSAR in presence of the direct signal interference and then proposes an SR based algorithm to cancel it. The sidelobe artifact of strong targets is another problem in passive radar imagery which degrades the quality of passive SAR images. The proposed method considers the cancellation of sidelobe effects of strong targets too. Experimental results indicate that the proposed algorithm is effective.