基于SVD的高频地波雷达干扰与杂波抑除算法

张雅斌; 陈卫东; 张守宏; 尚海燕

基于SVD的高频地波雷达干扰与杂波抑除算法

张雅斌^{①②;陈卫东},
陈卫东,
张守宏,
尚海燕

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出版历程
- 收稿日期: 2005-11-28
- 修回日期: 2006-05-29
- 刊出日期: 2006-11-19

Interference and Clutter Mitigation Based on SVD for HFGWR

摘要

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。
- 高频地波雷达; 干扰抑制; 一阶海杂波; 奇异值分解
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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