Study On Weak Square Wave Detection Method By Duffing Oscillator

The weak signal can be detected by chaotic oscillator owing to its property ofsensitive dependence on initial conditions and of immunity from noise. A new methodto identify chaos is put forward based on the study on the relationship of two Duffingoscillator. By using this method, the intermittent chaos can be identified and itsperiodic can be calculated. A method of weak signal detection by using signal todisturb the damping rate of the Duffing oscillator is put forward. The influence of theparameters on the system which is based on this method is demonstrated by charts andtables.Several method to detect square wave based on Duffing oscillator is studied.Anew method to detect square wave by using a Duffing oscillator array is put forward.The detection of the square wave and the digital base-band signal are realized bydisturbing the damping rate of the Duffing oscillator.By using LabVIEW7.1, several virtual instruments are designed based on themethods which are proposed in this paper.