Research Papers

Azimuth preprocessing for monostatic and bistatic spotlight synthetic aperture radar maging based on spectral analysis convolution

[+] Author Affiliations
Lei Zhang

Xidian University, Key Lab for Radar Signal Processing, Xi'an, Shaanxi 710071 China

Chengwei Qiu

National University of Singapore, Radar and Signal Processing Lab, Singapore, 117576 Singapore

Mengdao Xing, Zheng Bao

Xidian University, Key Lab for Radar Signal Processing, Xi'an, Shaanxi 710071 China

J. Appl. Remote Sens. 3(1), 033565 (November 13, 2009). doi:10.1117/1.3268325
History: Received March 4, 2009; Revised June 25, 2009; Accepted October 22, 2009; November 13, 2009; Online November 13, 2009
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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.

© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Lei Zhang ; Chengwei Qiu ; Mengdao Xing and Zheng Bao
"Azimuth preprocessing for monostatic and bistatic spotlight synthetic aperture radar maging based on spectral analysis convolution", J. Appl. Remote Sens. 3(1), 033565 (November 13, 2009). ; http://dx.doi.org/10.1117/1.3268325


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