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International Journal of Antennas and Propagation
Volume 2014, Article ID 130784, 9 pages
http://dx.doi.org/10.1155/2014/130784
Research Article

Efficient Bistatic SAR Raw Signal Simulator of Extended Scenes

1Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2University of the Chinese Academy of Sciences, Beijing 100039, China

Received 17 September 2013; Revised 24 December 2013; Accepted 24 December 2013; Published 10 February 2014

Academic Editor: Dau-Chyrh Chang

Copyright © 2014 Liang Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Bistatic SAR system is a new mode that allocates the radar transmitter and receiver on different platforms and has more advantages compared to the monostatic case. However, the existing bistatic SAR raw data simulator in the frequency domain can only handle the case of translation invariant system. In this paper, an efficient 2D frequency-domain raw data simulator of extended scenes for bistatic SAR of translation variant system is proposed by a geometric transformation method for the first time, where inverse STOLT interpolation is used to formulate the range migration terms. The presented simulator can accommodate the translation variant bistatic SAR system compared with existing bistatic SAR simulator. And it is more efficient than the time domain one by making use of Fast Fourier Transform (FFT). Simulation results for point targets and a real SAR image demonstrate its validity and effectiveness.