摘要
该文针对高频地波雷达探海工作期间高频干扰严重海杂波强的特点,干扰抑制时引入海杂波约束条件,对自适应阵列波束形成方法进行了改进,防止干扰抑制后回波中一阶海杂波时域相关特性发生破坏而在频谱上虚假展宽。然后,使用干扰抑制结果构造时域采样矩阵,由奇异值分解(SVD)方法获得积累期间一阶海杂波频率的变化历程,通过矩阵特征分析将一阶海杂波滤除。最后,使用OSMAR2000实测数据检验了本文算法的有效性。
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.
出处
《电子与信息学报》
EI
CSCD
北大核心
2006年第11期1994-1997,共4页
Journal of Electronics & Information Technology
基金
国家部级基金(40106020203)资助课题
关键词
高频地波雷达
干扰抑制
一阶海杂波
奇异值分解
HF Ground Wave Radar (HFGWR), Interference suppression, First-order sea clutter, Singular Value Decomposition (SVD)