paper 150312011340

Published: 2015-07-09

Rapid Echo Simulation for One-stationary Bistatic SAR Based on FFT and Subaperture Processing

Dao Xiang An,

Dao Xiang An

National University of Defense Technology, China

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Xiaotao Huang,

Xiaotao Huang

National University of Defense Technology, China

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Hongtu Xie,

Hongtu Xie

National University of Defense Technology, China

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Zhi-Min Zhou

National University of Defense Technology, China

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Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1429-1435

Abstract

In this study, a rapid echo simulation method based on fast Fourier transform (FFT) and subaperture processing for the one-stationary bistatic synthetic aperture radar (OS- BSAR) is presented. First, the OSBSAR geometry is built in elliptical polar coordinate, and then the scene is divided into several equidistant elliptical rings. Based on the equivalent scat- terer model, the approximate SAR system transfer function is derived, thus each pulse echo is calculated by the convolution of the transmitted signal and transfer function using the FFT. To further improve the simulation efficiency, the subaperture and subscene processing are used. The transfer function for the same subaperture pulses is calculated by the weighted sum of all the subscene equivalent scattering coefficient in the same equidistant elliptical ring using the FFT. Implementation of the proposed method is discussed. Simulation results are given to prove its validity.

Citation

Dao Xiang An, Xiaotao Huang, Hongtu Xie, and Zhi-Min Zhou, "Rapid Echo Simulation for One-stationary Bistatic SAR Based on FFT and Subaperture Processing," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1429-1435

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