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提出了一种对微弱周期信号的定量检测方法.分析混沌振子系统在大尺度周期状态下的相对稳定输出时,发现了混沌振子系统输出周期解的平均面积是一个比较稳定的几何特征量.该几何特征量与待测信号幅值之间存在比较稳定的单调递增关系.在一定的参数条件下,几何特征量精度可达到10-6V2.利用混沌系统对随机噪声信号的免疫性和对微弱周期信号的敏感性,进一步建立了微弱周期信号的定量检测方法.仿真实验表明,随着待检测幅度的增加,在保证检测精度的同时,抗噪性能也随之增强.
A method of quantitative detection of weak period signal is proposed.When the relative steady output of chaotic oscillator system is large in periodic state, it is found that the average area of the output periodic solution of chaotic oscillator system is a stable geometric feature. There is a stable and monotonically increasing relationship between the geometric feature quantity and the amplitude of the signal to be measured.Under certain parameters, the accuracy of the geometric feature quantity can reach 10-6V2. By using the chaotic system’s immunity to random noise signals and the weak period The sensitivity of the signal and the further establishment of a weak periodic signal quantitative detection method.The simulation experiments show that with the increase of the amplitude to be detected, while ensuring the detection accuracy, the anti-noise performance also increases.