This paper focuses on the problem of maritime surveillance for ship detection and proposes a novel monostatic SAR high resolution wide swath imaging scheme. The scheme changes the way that Scan SAR illuminates sub-scenes, and proposes a scanning mode using the prior information of ships' spatial distribution in each sub-scene. Firstly, a method based on range profiles is used to obtain the target number in each sub-scene. After that, the radar illuminates each sub-scene in a probability calculated by a transfer-probability matrix. Finally, a compress sensing algorithm is utilized to reconstruct each sub-scene using the obtained sparse aperture echo data, and the whole wide swath image is joint by putting all the sub-scenes together. Experimental results show that the proposed imaging scheme can get a wide swath image effectively without reducing the image resolution.
['Jiacheng Ni', 'Qun Zhang', 'K. Wang', 'Fufei Gu', 'Ying Luo']
A novel monostatic SAR HRWS imaging scheme for maritime surveillance