| 基于分数阶谱相减的弱目标检测方法 |
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| 引用本文： | 郭海燕,董云龙,关键.基于分数阶谱相减的弱目标检测方法[J].雷达科学与技术,2011,9(2):135-139. |
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| 作者姓名： | 郭海燕 董云龙 关键 |
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| 作者单位： | 海军航空工程学院,山东,烟台,264001 |
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| 基金项目： | 国家自然科学基金(No.60672140,60802088); “泰山学者”建设工程专项经费资助; 航空科学基金(No.20095184004) |
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| 摘 要： | 提出了海杂波背景下的基于分数阶谱相减的弱运动目标检测方法。该方法通过对回波信号检测单元和参考单元分别作分数阶Fourier变换(FRFT),然后将得到的两个模值相减来构成检测统计量,达到抑制杂波、提高检测概率的目的。利用IPIX实测数据实验表明,所提方法在增加目标与杂波FRFT峰值差、提高信杂比以及检测概率等方面都明显优于仅对回波作FRFT变换。在信杂比降低到-12 dB时仍能很容易地检测出目标。设置适当的恒虚警检测门限,该检测方法能够达到更好的检测效果。
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| 关 键 词： | 分数阶Fourier变换 杂波抑制 谱相减 海杂波 |
Weak Target Detection Based on Fractional Spectral Subtraction in Sea Clutter |
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| GUO Hai-yan,DONG Yun-long,GUAN Jian.Weak Target Detection Based on Fractional Spectral Subtraction in Sea Clutter[J].Radar Science and Technology,2011,9(2):135-139. |
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| Authors: | GUO Hai-yan DONG Yun-long GUAN Jian |
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| Affiliation: | GUO Hai-yan,DONG Yun-long,GUAN Jian(Naval Aeronautical and Astronautical University,Yantai 264001,China) |
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| Abstract: | A method based on fractional spectral subtraction for detecting weak targets in sea clutter is proposed.The method applies FRFT(fractional Fourier transform) to detect cell and reference cell respectively.The fractional clutter spectrum is subtracted from the fractional signal-clutter spectrum to enhance the signal and reject the clutter.Experiment using the IPIX data shows that the proposed method has significant advantage in increasing the signal-clutter FRFT peak value difference and enhancing the SCR.Wh... |
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| Keywords: | fractional Fourier transform clutter rejection spectral subtraction sea clutter |
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