一種基于壓縮感知的天波超視距雷達短時海雜波抑制方法

嚴韜; 陳建文; 鮑拯

doi:10.11999/JEIT160576

一種基于壓縮感知的天波超視距雷達短時海雜波抑制方法

doi: 10.11999/JEIT160576 cstr: 32379.14.JEIT160576

基金項目:

國家自然科學(xué)基金(61471391)

計量
- 文章訪問數(shù): 1676
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-06-01
- 修回日期: 2016-12-15
- 刊出日期: 2017-04-19

Sea Clutter Suppression Method for Over-the-horizon Radar with Short Coherent Integration Time Based on Compressed Sensing

Funds:

The National Natural Science Foundation of China (61471391)

摘要

摘要: 針對傳統(tǒng)時域?qū)ο椒ㄔ诙虝r條件下雜波重構(gòu)精度低、抑制性能差的缺陷，該文提出一種基于壓縮感知的天波雷達短時海雜波重構(gòu)及抑制方法。首先對天波雷達短時回波模型進行了建模，在此基礎(chǔ)上分析了利用壓縮感知進行短時海雜波重構(gòu)的合理性；其次分別從基于復(fù)冗余正弦字典的回波稀疏表示、基于降維字典的傳感矩陣表示和基于改進的正交匹配追蹤算法的雜波重構(gòu)及抑制3個步驟對所提算法進行了詳細闡述；最后進行了計算機仿真分析和實測數(shù)據(jù)驗證。相關(guān)結(jié)果表明，在短時條件下，所提方法較傳統(tǒng)時域?qū)ο椒ê妥涌臻g類抑制方法具有較優(yōu)的雜波抑制性能和工程應(yīng)用價值。
- 天波超視距雷達 /
- 壓縮感知 /
- 相干積累時間 /
- 海雜波抑制 /
- 冗余字典
Abstract: To deal with the drawbacks of low reconstruction accuracy and poor suppression performance of clutter with short Coherent Integration Time (CIT) for traditional time domain cancellation method, a method of sea clutter reconstruction and suppression based on Compressed Sensing (CS) is proposed. Firstly, echoes model of Over-The-Horizon Radar (OTHR) with short CIT is established, and the rationality using CS to reconstruct sea clutter is analyzed. Secondly, the proposed method is elaborated in detail from sparse representation of echoes model based on redundant sinusoidal?dictionary, representation of sensing matrix based on dimensionality reduction dictionary and sea clutter reconstruction and suppression based on the modified Orthogonal Matching Pursuit (OMP) algorithm respectively. Finally, the computer simulation analysis and measured data verification are accomplished. The results indicate that the clutter suppression performance and engineering application value of the proposed method are better than the traditional time domain cancellation method and subspace methods in the condition of short CIT.
- Skywave Over-The-Horizon Radar (OTHR) /
- Compressed Sensing (CS) /
- Coherent Integration Time (CIT) /
- Sea clutter suppression /
- Redundant dictionary

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