Inverse synthetic aperture radar imaging based on varying-parameter method

Feng Wang; Jingwen Li; Bing Sun; Yan Wang

doi:10.1117/12.2302512

10 April 2018 Inverse synthetic aperture radar imaging based on varying-parameter method

Feng Wang, Jingwen Li, Bing Sun, Yan Wang

Proceedings Volume 10615, Ninth International Conference on Graphic and Image Processing (ICGIP 2017); 106153L (2018) https://doi.org/10.1117/12.2302512
Event: Ninth International Conference on Graphic and Image Processing, 2017, Qingdao, China

Abstract

Inverse synthetic aperture radar (ISAR) increases the target rotation angle to improve the azimuth resolution. Since the echo data points are fan-shaped in wave number domain, the effective interpolation region is broadened in azimuth direction and compressed in range direction while the target rotation angle increases in the process of Polar Format Algorithm (PFA). This gives rise to the reduction of range wave number bandwidth, which causes the range resolution loss. In this paper, an imaging algorithm based on the varying-parameter method is proposed to eliminate the change of range wave number caused by the rotation angle. This method makes the echo data points wedge distributed in the wave number domain by adjusting radar platform parameters in azimuth direction at each azimuth sampling point. Thus, the compression of range wave number width is effectively reduced. Finally, the simulations are performed to verify that the varying-parameter method can restrain the deterioration of range resolution to improve the quality of image.

Citation Download Citation

Feng Wang, Jingwen Li, Bing Sun, and Yan Wang "Inverse synthetic aperture radar imaging based on varying-parameter method", Proc. SPIE 10615, Ninth International Conference on Graphic and Image Processing (ICGIP 2017), 106153L (10 April 2018); https://doi.org/10.1117/12.2302512

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KEYWORDS

Image resolution

Signal processing

Image processing

Radar

Radar imaging

Data processing

Detection and tracking algorithms

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