一种基于分数阶傅里叶变换的主动声自导回波检测方法

An active acoustic homing echo detection method based on the fractional Fourier transform

研究一种基于分数阶傅里叶变换(FRFT)的主动声自导回波信号检测方法。在主动声自导中chirp类信号是常用的主动目标探测信号之一。由于分数阶傅里叶变换在处理chirp类信号时具有巨大优势,提出一种新的chirp类回波信号检测方法,通过对回波信号进行FRFT处理与相关处理可实现对目标的有效检测。仿真结果表明,与传统拷贝相关方法相比,基于FRFT的chirp类检测方法具有更佳的检测效果,在声自导中具有良好的应用前景。

In this paper,a detection method of active homing echo signal based on fraction Fourier transform(FRFT)is studied.Chirp signal is one of the common active target detection signals in active acoustic homing.Due to the great advantage of fraction Fourier transform in processing chirp signal,a new method of chirp echo signal detection is proposed in this paper.Through FRFT processing and correlation processing,the target can be detected effectively.Simulation results show that,compared with the traditional copy correlation method,the chirp detection method based on FRFT has better detection effect,and has a good application prospect in acoustic homing.