Tandem Bistatic Squint SAR Imaging Algorithm Based on the Chirp-Z Transform

Wu Yong-jun; Wu Xian-liang

doi:10.3724/SP.J.1146.2009.00102

Volume 32 Issue 2

Aug. 2010

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Article Navigation > Journal of Electronics & Information Technology > 2010 > 32(2): 383-387

Wu Yong-jun, Wu Xian-liang. Tandem Bistatic Squint SAR Imaging Algorithm Based on the Chirp-Z Transform[J]. Journal of Electronics & Information Technology, 2010, 32(2): 383-387. doi: 10.3724/SP.J.1146.2009.00102

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Wu Yong-jun, Wu Xian-liang. Tandem Bistatic Squint SAR Imaging Algorithm Based on the Chirp-Z Transform[J]. Journal of Electronics & Information Technology, 2010, 32(2): 383-387. doi: 10.3724/SP.J.1146.2009.00102

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Tandem Bistatic Squint SAR Imaging Algorithm Based on the Chirp-Z Transform

doi: 10.3724/SP.J.1146.2009.00102

Wu Yong-jun^{①②
,},
Wu Xian-liang^①

Received Date: 2009-01-19
Rev Recd Date: 2009-07-16
Publish Date: 2010-02-19

Abstract

Abstract

This paper firstly setups the geometric model of the tandem bistatic squint SAR and presents the mathematic expression of the radar echoes, then its two-dimensional frequency spectrum is derived and its characteristic is analyzed. In two-dimensional frequency domain, the point targets in the center of the observed scene is precisely imaged by using the focusing function, then the Chirp-Z transform is used to correct the range cell migration of the target echoes in both side of the center points. Finally, the radar images are obtained by the inverse Fourier transform on the azimuth direction. Since the algorithm uses the property of the Chirp-Z transform processing the nonlinear modulation frequency signal, the processing procedure is simplified and the imaging precision is greatly improved. The simulation tests validate this new algorithm based on the Chirp-Z transform to process the data of the tandem bistatic squint SAR.

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References(1)

References

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