Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (1): 45-48.

• 电子技术 • 上一篇    下一篇

基于分数阶功率谱的LFM信号检测

尹治平, 张义安, 陈卫东, 王东进   

  1. 中国科学技术大学电子工程与信息科学系, 安徽, 合肥, 230027
  • 收稿日期:2007-12-20 修回日期:2008-06-24 出版日期:2009-01-20 发布日期:2010-01-03
  • 作者简介:尹治平(1980- ),男,博士研究生,主要研究方向为雷达信号处理,逆合成孔径雷达成像技术等.E-mail:zpyin@mail.ustcedu.cn

LFM signal detection based on fractional power spectrum

YIN Zhi-pin, ZHANG Yi-an, CHEN Wei-dong, WANG Dong-jin   

  1. Dept. of Electronic Engineering and Information Science, Univ. of Science & Technology of China, Hefei 230027, China
  • Received:2007-12-20 Revised:2008-06-24 Online:2009-01-20 Published:2010-01-03

摘要: 从分数阶傅里叶变换与Winger-Ville分布的关系出发,推导出分数阶功率谱与模糊函数过原点切片之间的傅里叶变换关系,提出了一种基于分数阶功率谱的LFM信号检测新因子,并证明了该因子与RAT检测因子等价。基于新因子的检测只需计算信号一定角度区域内的分数阶功率谱就能实现检测,因此相比于RAT方法在计算量上具有比较明显的优势。

Abstract: The interesting fact that the radial slice of the ambiguity function is the Fourier transform of the fractional power spectrum is deduced from the relationships between fractional Fourier transform(FRFT) and time-frequency distributions.Then a new detector for linear frequency modulated signals is proposed,and the equivalence between the new detector and the RAT detector is demonstrated.Therefore a new LFM signal detection method using the new detector is proposed.Only some FRFT calculation in certain angle is essential for the new method,so its computational complexity is lower than that of the RAT method.

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