School of Mathematical and Statistical Sciences Faculty Publications and Presentations
Document Type
Conference Proceeding
Publication Date
4-12-2021
Abstract
Synthetic aperture radar (SAR) echo simulation offers a low-cost and convenient way to obtain high-resolution images of targets, and plays an important role in system design and algorithm validation. Although high frequency approximation simulation is widely used, it is considered to be imprecise when calculating scattering field of fine structures, such as exhaust pipes and groove structures, especially in low frequency band. In this paper, a finite-difference time-domain (FDTD) based method is proposed for high-precision SAR echo simulation. In this method, scattering process of electromagnetic wave is accurately simulated to obtain equivalent electric and magnetic current on the surface of the target. Also, a near-to-far-field transformation is applied to the equivalent electric and magnetic current to calculate the field at the receiving antenna. In this transformation, a waveform forming method is introduced to simulate stripmap SAR echoes. By introducing this method, the usage of FDTD in one single simulation can be greatly reduced. The experiments show that proposed method can significantly improve the efficiency of the simulation while maintaining echo accuracy.
Recommended Citation
Bin Zou, Yanqiu Jia, Zhijun Qiao, "A high-precision SAR echo simulation method based on FDTD," Proc. SPIE 11742, Radar Sensor Technology XXV, 1174212 (12 April 2021); doi: 10.1117/12.2587380
Publication Title
Proc. SPIE 11742, Radar Sensor Technology XXV
DOI
10.1117/12.2587380
Comments
Copyright 2021. Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.