Research on Chaotic Threshold Criterion Based on the Difference of Solution

In the processing of weak signal detection using chaotic oscillator, chaotic threshold criterion is always attention of experts at home and abroad. In this paper, according to Duffing equation's almost periodicity, a new threshold criterion method based on difference of chaotic system solution is proposed. For comparison between the method and phase plane method, these methods all can realize chaotic threshold criterion under the same conditions. Simulation results are presented to validate the proposed threshold criterion method. Furthermore, from the simulation results, it can be seen that the proposed method is simple algorithm, high accuracy, unaffected by human and outperforms the other methods.