An improved RD algorithm of curved trajectory bistatic SAR based on Chebyshev polynomials

Xiyi Xu; Gewei Tan; Biao Li

doi:10.1117/12.2631571

1 May 2022 An improved RD algorithm of curved trajectory bistatic SAR based on Chebyshev polynomials

Xiyi Xu, Gewei Tan, Biao Li

Proceedings Volume 12171, Thirteenth International Conference on Signal Processing Systems (ICSPS 2021); 1217115 (2022) https://doi.org/10.1117/12.2631571
Event: Thirteenth International Conference on Signal Processing Systems (ICSPS 2021), 2021, Shanghai, China

Abstract

According to the requirements of high resolution real time imaging of curved trajectory Bistatic Synthetic Aperture Radar (BiSAR), an improved RD algorithm is proposed in this paper. Firstly, the slant range of curved BiSAR is established by Chebyshev polynomials. Secondly, linear range cell migration (LRCM) and Doppler linear phase are compensated, and the high order approximate two-dimensional spectrum of echo signal is obtained by the method of series inversion (MSR) and Chebyshev decomposition. Finally, the focused image is obtained by matched filtering and phase compensation. By using Chebyshev polynomials to approximate slant range and spectral phase, the focus quality of BiSAR data is improved. Experimental results show that the algorithm can effectively compensate the motion error caused by three-dimensional acceleration and improve the imaging quality of the long distance edge point targets.

Citation Download Citation

Xiyi Xu, Gewei Tan, and Biao Li "An improved RD algorithm of curved trajectory bistatic SAR based on Chebyshev polynomials", Proc. SPIE 12171, Thirteenth International Conference on Signal Processing Systems (ICSPS 2021), 1217115 (1 May 2022); https://doi.org/10.1117/12.2631571

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KEYWORDS

Detection and tracking algorithms

Synthetic aperture radar

Phase compensation

Receivers

Transmitters

Doppler effect

3D acquisition

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