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电子学报  2012 

分数阶傅里叶滤波在欺骗干扰中的应用研究

DOI: 10.3969/j.issn.0372-2112.2012.07.007, PP. 1328-1332

Keywords: 分数阶傅里叶变换,时频域截断,分数阶滤波,欺骗干扰

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Abstract:

分数阶傅里叶变换较之于传统傅里叶变换能更有效地将线性调频信号与噪声分离.但分数阶傅里叶域频谱能量的聚集性受信号占空比及调频带宽两方面影响,当占空比较小并且调频带宽很宽时,往往难以得到尖锐的谱峰.本文提出短时滑窗方式的分数阶傅里叶滤波方法,分析了时频域截断对其频谱的影响,在此基础上提供一种低信噪比情况下线性调频信号的检测准则,进而详细论述分数阶傅里叶域滤波的流程.仿真结果表明,运用这种准流水方式的滤波方法处理盲信号,信噪比可提高10dB以上,而有用信号的能量损失却极小.在雷达的欺骗干扰领域应用此方法可提高干扰性能.

References

[1]  H M Ozaktas,Orhan Arikan,et al.Digital computation of the fractional Fourier transform [J].IEEE Transactions on Signal Processing,1996,44(9):2141-2150.
[2]  S C Pei,J J Ding.Closed-form discrete fractional and affine Fourier transform [J].IEEE Transactions on Signal Processing,2000,48(5):1338-1353.
[3]  陶然,邓兵,王越.分数阶傅里叶变换及其应用[M].北京:清华大学出版社,2009.98-101.
[4]  赵兴浩,陶然,等.分数阶傅里叶变换的快速计算新方法[J].电子学报,2007,35(6):1089-1093. ZHAO Xing-hao,TAO Ran,et al.New methods for fast computation of fractional Fourier transform [J].Acta Electronica Sinica,2007,35(6):1089-1093.(in Chinese)
[5]  汤礼建,等.基于卷积调制的脉内多假目标干扰技术研究[J].电子信息对抗技术,2008,23(3):43-45. TANG Li-jian,et al.Multi-fake-target jamming within pulse based on convolution modulation [J].Electronic Information Warfare Technology,2008,23(3):43-45.(in Chinese)
[6]  N Wiener.Hermitian polynomial and Fourier analysis [J].Journal of Mathematics Physics MIT,1926,18:70-73.
[7]  V Namias.The fractional order Fourier transform and its application to quantum mechanics [J].Journal of the Institute of Mathematics and Its Applications,1980,25(3):241-265.
[8]  A C McBride,F H Kerr.On namias'' fractional Fourier transform [J].IMA Journal of Applied Mathematics,1987,39(2):159-175.
[9]  H M Ozaktas,O Aytur.Fractional Fourier domains [J].Signal Processing,1995,46(1):119-124.
[10]  L B Almeida.The fractional Fourier transform and time-frequency representations [J].IEEE Transactions on Signal Processing,1994,42(11):3084-3091.
[11]  agatay Candan,M Alper Kutay,Haldun M Ozaktas.The discrete fractional Fourier transform [J].IEEE Transactions on Signal Processing,2000,48(5):1329-1337.

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