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| Interference and Clutter Mitigation Based on SVD for HFGWR |
| Zhang Ya-bin①②; Chen Wei-dong②; Zhang Shou-hong①; Shang Hai-yan① |
①National Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China;
②Baoji Meteorological Bureau, Baoji 721006, China |
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Abstract HF ground wave radar encounters intense interference and clutter during operation in ocean environment. This paper presents an improved adaptive beamforming algorithm introducing clutter constraints which do not destroy the temporal coherence of first-order sea clutter and broaden frequency spectrum falsely after interference suppression. Furthermore, Singular Value Decomposition (SVD) for matrix constructed by interference suppressed data is employed to track frequency evolvement of first-order sea clutter during CIT and clear procedure by eigenvalue analysis is proposed. Experimental results demonstrate the effectiveness of presented algorithm using data acquired by OSMAR2000.
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Received: 28 November 2005
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2006, Vol. 28 
