Title: Back-projection imaging algorithm of random noise frequency modulation continuous wave SAR

Authors: Xingjian Xu; Yuehua Li; Can Wang

Addresses: School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China ' School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China ' School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China

Abstract: The combination of random noise frequency-modulation continuous wave technology and synthetic aperture radar (SAR) promises a cost-effective, low probability of intercept and high electromagnetic compatibility. This paper analyses the time-domain restricting algorithms for random noise frequency modulation continuous wave (RNFMCW) SAR. Two versions of the back-projection algorithm are proposed. At first, the radar antenna continuous motion in a pulse repetition period of RNFMCW SAR is analysed. Then the phase term which is caused by the continuous motion is described by a approximate expression with Taylor expansion. Meanwhile, both the start-stop approximate back-projection algorithm and the modified back-projection algorithm are proposed. In the end, with the help of numerical simulation, the limitations of the start-stop approximation back-projection algorithm and the validity of the modified back-projection algorithms are illustrated.

Keywords: random noise; FMCW; synthetic aperture radar; SAR; Taylor expansion; back-projection; correlation.

DOI: 10.1504/IJISE.2020.105290

International Journal of Industrial and Systems Engineering, 2020 Vol.34 No.2, pp.193 - 202

Received: 28 Aug 2017
Accepted: 17 May 2018

Published online: 14 Feb 2020 *

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