【作者】 乔鑫； 陈瑞； 王勇； 许录平；

【Author】 Qiao Xin Chen Rui Wang Yong Xu Luping (Xidian University Institute of Electronic Engineering Xi’an China)

【机构】 西安电子科技大学电子工程学院；

【摘要】 为了准确检测湮没在噪声中的脉冲星微弱信号,提出一种基于混沌振子的频率测量方法。该方法将混沌振子理论与微弱信号检测理论相结合,利用Duffing混沌振子对小信号的敏感性以及对噪声的免疫力检测单一的脉冲星微弱信号,并应用混沌测频法中,测量脉冲星信号的频率。通过实测脉冲星数据实验,结果表明该方法可检测脉冲星信号的信噪比远低于现有的基于Fourier变换的检测算法。更多还原

【Abstract】 In order to detect accurately pulsars weak signal with noise,an algorithm of the frequency measurement based on Chaotic Oscillator is proposed.The algorithm associates the chaos theory with weak signal detection theory,using the feature that Duffing Chaotic Oscillator is sensitive to small-signal and immunological to noise,to detect pulsars weak periodic signal, and measure the pulsars signal frequency.In this paper,test this algorithm with the measured pulsars data.The simulation results show that the algorithm can detect that signal to noise ratio is much lower than the current detection algorithm based on Fourier transform.更多还原