NDLI: Multi-mode clutter suppression of multiple-input–multiple-output over-the-horizon radar based on blind source separation

Content Provider	IET Digital Library
Author	Dou, Daoxiang Li, Mao He, Zishu
Abstract	Spread-Doppler clutter caused by multi-mode propagation seriously affects the over-the-horizon radar detection performance for slow ships. To solve this problem, the authors propose to suppress multi-mode clutter using spatial information in the multiple-input–multiple-output over-the-horizon radar system. Traditional processing algorithms need prior information of the target direction. However, it is often not readily available. In this study, they propose a novel multi-mode clutter suppression algorithm based on the second-order blind identification (SOBI) technique. The proposed algorithm does not need prior information of the target direction and can effectively suppress the multi-mode clutter. Considering that the SOBI algorithm affected by the similarity in sources spectra, they improve the proposed algorithm using the spatial smoothing technique. Simulation results show that, in the single target scene, the improved algorithm can effectively eliminate the spectrum burrs caused by incomplete separation, making separated signals smoother. Signal-to-clutter-noise ratio is greatly improved. The good multi-mode clutter suppression performance is obtained. In the multi-mode scenario that double targets with the same radial velocity, that is, sources spectra have similarities, the algorithm based on SOBI cannot separate all targets. Although the improved algorithm can make all targets visible and effectively suppresses the multi-mode clutter.
Starting Page	956
Ending Page	966
Page Count	11
ISSN	17518784
Volume Number	9
e-ISSN	17518792
Issue Number	Issue 8, Oct (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/9/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2014.0302
Journal	IET Radar, Sonar & Navigation
Publisher Date	2015-04-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Blind Source Separation Doppler Radar MIMO Radar Multimode Clutter Suppression Algorithm Multimode Propagation Multiple-input-multiple-output Over-the-horizon Radar System Radar Clutter Radar Detection Radar Detection Performance Radar Equipment Radar Signal Processing Radial Velocity Second-order Blind Identification Technique Signal Detection Signal Processing Signal-to-clutter-noise Ratio Smoothing Method SOBI Algorithm Source Spectra Spatial Smoothing Technique Spectrum Burrs Elimination Spread-Doppler Clutter System And Application Target Direction
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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