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Journal of Applied Remote Sensing

Azimuth preprocessing for monostatic and bistatic spotlight synthetic aperture radar maging based on spectral analysis convolution
Author(s): Lei Zhang; Cheng-Wei Qiu; Mengdao Xing; Zheng Bao
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Paper Abstract

Dechirping is a technique widely used to reduce sampling rate. It is well suited for the illumination of small scenes. In this paper, we extend this idea to mono/bistatic spotlight synthetic aperture radar (SAR) imaging. An azimuth preprocessor based on the spectral analysis (SPECAN) convolution is presented. The convolution overcomes the Doppler aliasing of echoed signals, while the wavenumber analytic formula keeps unchanged. Since the spatial characteristic of the signal is preserved, the preprocessing is well compatible with conventional focusing approaches, such as chirp scaling algorithm and frequency scaling algorithm The proposed method is validated by simulations in both monostatic and bistatic cases.

Paper Details

Date Published: 1 November 2009
PDF: 20 pages
J. Appl. Rem. Sens. 3(1) 033565 doi: 10.1117/1.3268325
Published in: Journal of Applied Remote Sensing Volume 3, Issue 1
Show Author Affiliations
Lei Zhang, Xidian Univ. (China)
Cheng-Wei Qiu, National Univ. of Singapore (Singapore)
Mengdao Xing, Xidian Univ. (China)
Zheng Bao, Xidian Univ. (China)

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