海军航空工程学院学报2017，Vol.32Issue(6)：506-510,516,6.DOI:10.7682/j.issn.1673-1522.2017.06.002
基于分数阶Fourier变换的微弱LFM信号检测
Detection of Weak LFM Signal Based on the Fractional Fourier Transform
摘要
Abstract
In order to improve the detection ability of reconnaissance system for weak LFM signal,a method of detection of weak LFM signal was presented based on the fractional Fourier transform.First,the output SNR of LFM signal was ana?lyzed based on digital computation of the fractional Fourier transform.It was discovered that the fractional Fourier trans?form could improve the output SNR of LFM signal when signal's sampling points were added.Using this conclusion,the method was presented by adding or interpolating signal's sampling points, to improve detection ability of the fractional Fourier transform for weak LFM signal.Finally,the effectiveness of the method was verify by simulations.关键词
分数阶Fourier变换/微弱LFM信号/信号检测Key words
fractional Fourier transform/weak LFM signal/signal detection分类
信息技术与安全科学引用本文复制引用
纪秀美,张莉,李俊超..基于分数阶Fourier变换的微弱LFM信号检测[J].海军航空工程学院学报,2017,32(6):506-510,516,6.基金项目
国家自然科学基金资助项目(61174156) （61174156）
