线性调频信号检测的快速调频变换算法

LFM signal detection by fast chirp transform

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。

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.