Sky-wave Radar Transient Interference Suppression Based on Matrix Completion
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摘要: 瞬態(tài)干擾持續(xù)時間短、強度大，嚴重影響天波超視距雷達的性能。傳統(tǒng)的瞬態(tài)干擾抑制方法需要預先抑制海雜波，且只能抑制強瞬態(tài)干擾，不能抑制弱瞬態(tài)干擾和噪聲，該文提出一種基于矩陣補全的瞬態(tài)干擾抑制算法，該方法首先利用Teager-Kaiser算子進行瞬態(tài)干擾檢測，然后將干擾數(shù)據(jù)剔除，最后利用海雜波和目標回波構(gòu)成的Hankel矩陣的低秩性，通過改進的低秩矩陣補全算法進行數(shù)據(jù)恢復。該算法不僅能夠抑制強瞬態(tài)干擾，而且能同時抑制弱瞬態(tài)干擾和噪聲，提高了回波信號的信噪比。實測和仿真數(shù)據(jù)處理結(jié)果證明了算法的有效性。
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關(guān)鍵詞:
- 天波超視距雷達 /
- 瞬態(tài)干擾抑制 /
- 矩陣補全 /
- Teager-Kaiser算子
Abstract: The transient interference can dramatically degrade the performance of over-the-horizon radar. The traditional interference suppression methods need to suppress the sea clutter, and only can suppress the strong transient interference, not mitigate the weak one and the noise. A novel interference suppression method is proposed based on the low-rank matrix completion. Firstly, the proposed method detects the interference via the Teager-Kaiser operator, subsequently excises the interference data. Then, considering that the Hankel matrix of clutter-plus-target signals is low-rank, the matrix completion method is exploited to recover the interference- removed signal. The proposed algorithm can suppress not only the strong interference, but also the weak one and the noise, improving the signal to noise ratio of echo. The simulation and experimental results demonstrate the effectiveness of the proposed method. -
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