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电子学报  2012 

提高雷达机动目标检测性能的二维频率域匹配方法

, PP. 2415-2420

Keywords: 机动运动,匹配滤波,微弱目标,积累检测,keystone变换

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Abstract:

增加目标信号的积累时间是提高雷达对微弱目标探测能力的主要方法.但是,对于高速运动目标,在长时间相参积累期间,目标回波信号容易产生距离徙动和多普勒走动,若不进行补偿,目标信号能量不能有效积累.传统基于keystone变换的方法仅适用于目标作匀速运动的情形,当目标作机动运动时,距离弯曲不能通过keystone变换进行校正.针对目标作匀加速运动,且高速目标存在多普勒模糊情况,本文提出一种二维匹配滤波新方法,该方法将脉冲压缩后的目标回波转换到距离-多普勒二维频率域,通过构造一补偿函数进行匹配滤波处理.该方法不需要知道目标运动速度参数,由目标径向速度引起的距离走动和径向加速度引起的距离弯曲均能得到很好的消除,另外,所提算法可以有效地利用快速傅里叶变换实现而无需进行插值操作,运算量小.仿真结果表明本文方法具有良好的高速机动目标积累检测性能.

References

[1]  汪玲,朱兆达.一种基于最大修正峰度的ISAR距离对准算法[J].南京航空航天大学学报,2006,38(6):722-726. Wang Ling,Zhu Zhao-da.New range alignment algorithm for ISAR based on maximum modified kurtosis[J].Journal of Nanjing University of Aeronautics & Astronautics,2006,38(6):722-726.(in Chinese)
[2]  R P Perry,R C Dipietro,R L Fante.SAR imaging of moving targets [J].IEEE Trans on Aerospace and Electronic Systems,1999,35(1):188-199.
[3]  王俊,张守宏,杨克虎.利用自适应子波变换提高对微弱运动目标的检测性能[J].电子学报,1999,27(12):80-83. Wang Jun,Zhang Shou-hong,Yang Ke-hu.An improved coherent integration detector with adaptive wavelet transform [J].Acta Electronica Sinica,1999,27(12):80-83.(in Chinese)
[4]  Zeng J,Zhang J,Xiang L,et al.An improved hough transform algorithm for radar detection [J].Journal of Circuits,Systems and Computers,2010,19(3):549-555.
[5]  Zhu S Q,Liao G S,Qu Y.A new slant-range velocity ambiguity resolving approach of fast moving targets for SAR system [J].IEEE Trans on Geoscience and Remote Sensing,2010,48(1):432-45
[6]  C C Chen,H C Andress.Target-motion-induced radar imaging [J].IEEE Trans on Aerospace and Electronic Systems,1980,16 (1):2-14.
[7]  王琨,罗琳.ISAR成像中包络对齐的幅度相关全局最优法[J].电子科学学刊,1998,20(3):369-373. Wang Kun,Luo Lin.Global optimum method for motion compensation in ISAR imagery[J].Journal of Electronics,1998,20(3):369-373.(in Chinese)
[8]  王根原,保铮.逆合成孔径雷达运动补偿中包络对齐的新方法[J].电子学报,1998,26(6):5-8. Wang Gen-yuan,Bao Zheng.A new algorithm of range alignment in ISAR motion compensation[J].Acta Electronica Sinica,1998,26(6):5-8.(in Chinese)
[9]  Li X,Liu G S,Ni J L.Autofocusing of ISAR images based on entropy minimization .IEEE Trans on Aerospace and Electronic Systems,1999,35 (4) :1240-1251.
[10]  张顺生,曾涛.基于keystone变换的微弱目标检测[J].电子学报,2005,33(9):1675-1678. Zhang Shun-sheng,Zeng Tao.Weak target detection based on keystone transform .Acta Electronica Sinica,2005,33(9):1675-1678.(in Chinese)
[11]  Wang M S,Chan A K,Chui C K.Linear frequency modulated signal detection using Radon-ambiguity transform [J].IEEE Trans on Signal Processing,1998,26(3):571-586.
[12]  B Barkat,B Boashash.Instantaneous frequency estimation of polynomial FM signals using the peak of the PWVD:statistical performance in the presence of additive Gaussian noise [J].IEEE Trans on Signal Processing,1999,47(9):2480-2490.
[13]  Wang Y,Jiang Y C.ISAR imaging of maneuvering target based on the L-class of fourth-order complex-lag PWVD [J].IEEE Trans on Geoscience and Remote Sensing,2010,48(3):1518-1527.
[14]  齐林,陶然,周思永,等.基于分数阶Fourier变换的多分量LFM信号的检测和参数估计[J].中国科学(E辑),2003,33(8):749-759.
[15]  Tao R,Li Y L,Wang Y.Short-time fractional fourier transform and its applications [J].IEEE Trans on Signal Processing,2010,58(5):2568-2580.
[16]  刘建成,王雪松,刘忠,等.基于Wigner-Hough变换的LFM信号检测性能分析[J].电子学报,2007,35(6):1212-1217. Liu Jian-cheng,Wang Xue-song,Liu zhong.Detection performance of linear frequency modulated signals based on Wigner-Hough transform[J].Acta Electronica Sinica,2007,35(6):1212-1217.(in Chinese)
[17]  Zhu S Q,Liao G S,Qu Y,et al.Ground moving targets imaging algorithm for synthetic aperture radar[J].IEEE Trans on Geoscience and Remote Sensing,2011,49(1):462-477.
[18]  J Curlander,R McDonough.Synthetic Aperture Radar:Systems and Signal Processing [M].New York :John Wiley & Sons,1991.

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