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Mathematical Problems in Engineering
Volume 2016 (2016), Article ID 1382960, 6 pages
Research Article

Detection of Polyphase Codes Radar Signals in Low SNR

1College of Electronic Science and Engineering, Jilin University, Changchun 130021, China
2Department of Electronic Countermeasure, Aviation University of Air Force, Changchun 130022, China

Received 16 October 2015; Accepted 17 January 2016

Academic Editor: Kishin Sadarangani

Copyright © 2016 Runlan Tian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel effective detection method is proposed for electronic intelligence (ELINT) systems detecting polyphase codes radar signal in the low signal-to-noise ratio (SNR) scenario. The core idea of the proposed method is first to calculate the time-frequency distribution of polyphase codes radar signals via Wigner-Ville distribution (WVD); then the modified Hough transform (HT) is employed to cumulate all the energy of WVD’s ridges effectively to achieve signal detection. Compared with the generalised Wigner Hough transform (GWHT) method, the proposed method has a superior performance in low SNR and is not sensitive to the code type. Simulation results verify the validity of the proposed method.