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Journal of Applied Remote Sensing

Moving target detection method for bistatic radar using random stepped-frequency chirp signal
Author(s): Caiyong Lin; Ruiqi Tian; Dinghe Wang; Qinglong Bao; Zengping Chen
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Paper Abstract

As random stepped-frequency chirp (RSFC) signal is used in wide-band radar applications such as synthetic aperture radar (SAR) and inverse SAR. RSFC has advantages over the linear stepped-frequency chirp, including suppressing the range ambiguity, decoupling the range-Doppler coupling, and reducing the signal interference. RSFC is usually descrambled and then fed to the inverse fast Fourier transform (IFFT) to achieve a coherent integration as well as a high-resolution range. However, this method needs frequency descrambling and accurate velocity pre-estimation for moving target detection. We propose a coherent integration method based on time-dechirping for bistatic radar. This method can detect moving targets without frequency descrambling or accurate velocity pre-estimation. This paper first models the target echo mathematically and outlines the difficulties associated with the processing of IFFT for RSFC. Then the detailed principles of the proposed method are introduced and the flowchart is given. Finally, numerical simulations are conducted to verify the effectiveness of the proposed method and show its detecting ability in the presence of noise.

Paper Details

Date Published: 24 October 2016
PDF: 11 pages
J. Appl. Rem. Sens. 10(4) 045011 doi: 10.1117/1.JRS.10.045011
Published in: Journal of Applied Remote Sensing Volume 10, Issue 4
Show Author Affiliations
Caiyong Lin, National Univ. of Defense Technology (China)
Ruiqi Tian, National Univ. of Defense Technology (China)
Dinghe Wang, National Univ. of Defense Technology (China)
Qinglong Bao, National Univ. of Defense Technology (China)
Zengping Chen, National Univ. of Defense Technology (China)

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