结合隐函数导数方法的平行等速双基SAR成像

doi:10.3969/j.issn.1001-2400.2013.01.018

J4 ›› 2013, Vol. 40 ›› Issue (1): 100-104+140.doi: 10.3969/j.issn.1001-2400.2013.01.018

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Azimuth invariant bistatic SAR imaging using derivatives of an implicit function

HE Wei;HOU Yuxing;XIONG Tao;XING Mengdao

(National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071， China)

Received:2011-10-09 Online:2013-02-20 Published:2013-03-28
Contact: HE Wei E-mail:heweixd@gmail.com

Abstract

Abstract:

There are two square-root terms in the range history of a return signal from a Bistatic Synthetic Aperture Radar (BiSAR). The transfer function for imaging in the 2-D frequency or range Doppler domain using the principle of stationary phase cannot be analytically derived. To address this problem, we approximate the stationary phase of the 2-D spectrum with an expansion of the Taylor series at the azimuth frequency, and call the approximation the derivatives of an implicit function. After algebraic manipulation, the 2-D spectrum is obtained for an azimuth invariant BiSAR. With the proposed method we dissolve one square-root term out of two for an azimuth invariant BiSAR, which is especially advantageous in implementation of an imaging algorithm. Then, a modified Range Doppler Algorithm (RDA) is developed to process the BiSAR data. The promising results of simulation and real data processing are obtained.

Key words: azimuth invariant bistatic synthetic aperture radar, the derivatives of an implicit function, range Doppler algorithm

HE Wei;HOU Yuxing;XIONG Tao;XING Mengdao. Azimuth invariant bistatic SAR imaging using derivatives of an implicit function[J].J4, 2013, 40(1): 100-104+140.

Azimuth invariant bistatic SAR imaging using derivatives of an implicit function

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