Open AccessModelling of continuously distributed target for bistatic synthetic aperture radar imaging
Author(s) -
Chen Xinliang,
Fan Yujie,
Wei Yangkai,
Ding Zegang
Publication year - 2020
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0313
Subject(s) - correctness , synthetic aperture radar , computer science , echo (communications protocol) , discretization , bistatic radar , radar imaging , point target , grid , inverse synthetic aperture radar , point (geometry) , sampling (signal processing) , computation , radar , algorithm , computer vision , mathematics , geology , telecommunications , geodesy , filter (signal processing) , mathematical analysis , computer network , geometry
The point target model is widely used in the synthetic aperture radar (SAR) imaging simulation. Based on this model, the radar echo of a continuously distributed target can be expressed as the linear summation of the echo of many point targets which are known as scatters. However, the discretisation strategy is problematic. The discretisation grid must be very fine to assure convergence, thus the computation burden is heavy. Moreover, the result depends on how the target is discretised. It is shown that the SAR image generated from this model of the same target is inconsistent when using different sampling strategy. To overcome these drawbacks, a parameterised model is proposed in this study, which not only greatly reduce the amount of calculation, but also guarantee consistency of the results. Finally, the correctness of the proposed model is verified by SAR imaging results from the generated echo data.