基于双耦合高阶Duffing振子系统的弱信号检测

Weak signal detection based on two-coupled higher-order Duffing oscillator system

针对较强噪声背景下传统的弱信号检测方法存在的问题,提出了一种新颖的基于高阶Duffing振子的弱信号检测方法。阐述了其根据相图变化进行弱信号检测的工作原理,同时也对系统的抗噪性能进行了研究。构建了双耦合高阶Duffing振子系统,实现了对任意未知频率信号的检测,改善了系统的抗噪性。仿真实验证实了提出的方法能够更好地检测强噪声环境下的弱信号,对噪声具有更好的抑制作用,因此构建的振子用于实际微弱信号的检测具有可行性。

A novel weak signal detection method based on the higher-order Duffing oscillator under strong noise background is proposed.The fundamental principle of weak signal detection is described according to the transition of phase diagram and anti-noise performance of system is also studied.On the basis of this principle,a two-coupled higher-order Duffing oscillator system which can identify signals with any unknown frequency and has a better antinoise performance is proposed.Simulation experiments ultimately confirm that the weak signal in the strong noise background can be better detected by the method and the noise is better suppressed. The application of the oscillator in weak signal detection is feasible.