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线性调频信号检测的快速调频变换算法
引用本文:徐楚林,冯海泓,蒋国岩.线性调频信号检测的快速调频变换算法[J].声学技术,2009,28(2):196-199.
作者姓名:徐楚林  冯海泓  蒋国岩
作者单位:1. 中国科学院声学所东海研究站,上海,200032
2. 大连91439部队,辽宁大连,116041
摘    要:线性调频(LFM)信号是雷达和声呐系统中常用的宽带信号。介绍了一种快速调频变换算法,用于线性调频信号的检测。首先对该方法进行了详细的推导和讨论,讨论了该快速算法中使用到的部分傅立叶变换快速算法,并研究了快速调频变换算法的计算量。最后,实验表明了快速调频变换算法有良好的信号检测性能。

关 键 词:线性调频  快速调频变换  部分傅立叶变换
收稿时间:2008/12/20 0:00:00
修稿时间:2009/3/5 0:00:00

LFM signal detection by fast chirp transform
XU Chu-lin,FENG Hai-hong and JIANG Guo-yan.LFM signal detection by fast chirp transform[J].Technical Acoustics,2009,28(2):196-199.
Authors:XU Chu-lin  FENG Hai-hong and JIANG Guo-yan
Affiliation:XU Chu-lin, FENG Hai-hong, JIANG Guo-yan (1. Shanghai Acoustic Laboratory Academy of Sciences, Shanghai 200032, China; 2. Unit 91439, PLA, Dalian 116041, Liaoning, China)
Abstract:Linear Frequency Modulated (LFM) signal is a good choice in sonar and radar systems . In this paper the Fast Chirp Transform (FCT) algorithm and the related fast Fractional Fourier Transform (FRFT) algorithm are introduced, and it has been shown how the two algorithms can be used to detect the LFM signal effectively. In the end, an experiment is made to indicate the good performance of the FCT algorithm in signal detection.
Keywords:LFM  Fast Chirp Transform (FCT)  Fractional Fourier Transform (FRFT)
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