Weak wide-band signal detection method based on small-scale periodic state of Duffing oscillator
Hou Jian, Yan Xiao-peng †, Li Ping, Hao Xin-hong
       

(color online) Phase trajectories of the system in Eq. (5) driven by (a) Gaussian white noise n ( t ) ∼ N ( 0 , 0.1 2 ) ; (b) sinusoidal signal 0.004 cos ( 2 π × 1000 t ) without noise; (c) sinusoidal signal at −45 dB of SNR.