Detection of FSK Signal Based on Duffing Oscillator

The detection method based on Duffing oscillator is widely concerned due to its very low SNR detection limit,however,the but the now available literatures mainly focus on the detection of sinusoidal signal.In this paper,a new method is proposed to realize the detection of FSK signal by using Duffing oscillator.The experiment proves that this method can realize the detection of weak FSK signal when the SNR is less than -10dB,and is superior to the traditional methods.