摘要
The sensitive characteristic to the initial value of chaos system sufficiently demonstrates the superiority in weak signal parameters detection.Analyzing the current chaos-based frequency detection method,a novel generalized Duffing equation is proposed to detect weak signal frequency.By choosing a suitable adjusting factor,when the outside driving force frequency is equal to that of the detected signal,the generalized Duffing oscillator is in great period state,which can obtain the frequency information of the detected signal.The simulation results indicate this method is rapidly convenient and shows better accuracy.
基金
Supported by the National Natural Science Foundation of China under Grant No 10731050
the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China under Grant No IRTO0742
Science and Technology on Electronic Information Control Laboratory under Grant No HG2011001.
