Research of Polar Format Algorithm for Bistatic SAR Imaging Based on Chirp Scaling

Wang Xin; Zhu Daiy-in; Zhu Zhao-da

doi:10.3724/SP.J.1146.2008.00944

Volume 31 Issue 7

Dec. 2010

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Article Navigation > Journal of Electronics & Information Technology > 2009 > 31(7): 1674-1678

Wang Xin, Zhu Daiy-in, Zhu Zhao-da. Research of Polar Format Algorithm for Bistatic SAR Imaging Based on Chirp Scaling[J]. Journal of Electronics & Information Technology, 2009, 31(7): 1674-1678. doi: 10.3724/SP.J.1146.2008.00944

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Wang Xin, Zhu Daiy-in, Zhu Zhao-da. Research of Polar Format Algorithm for Bistatic SAR Imaging Based on Chirp Scaling[J]. Journal of Electronics & Information Technology, 2009, 31(7): 1674-1678. doi: 10.3724/SP.J.1146.2008.00944

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Research of Polar Format Algorithm for Bistatic SAR Imaging Based on Chirp Scaling

doi: 10.3724/SP.J.1146.2008.00944

Received Date: 2008-07-24
Rev Recd Date: 2009-01-14
Publish Date: 2009-07-19

Abstract

Abstract

This paper investigates an implementation of Polar Format Algorithm(PFA) in Bistatic SAR imaging based on the principle of Chirp Scaling(CS). PFA realizes datas Polar Coordinate Transformation by two 1-D interpolations, which is computationally expensive. Based on the linear frequency modulation characteristic of emission signal, the paper uses Chirp Scaling methodology to process data in range dimension, which only includes signal multiplications and FFTs, thereby avoiding interpolation. The chirped and dechirped signals are discussed separately. Compared with interpolation, the results are equivalent, but the method of CS has increased speed significantly. The experimental simulation results with the point target validate the validity of this method.

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References

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