The promising chaos model establishment of weak signal detection system

Abstract

In optical systems, the energies are very low if the photo source is divided through polarization beam splitters. Most of the energies are submerged in the noise and the useful signal is even weaker than the noise. Therefore we must detect the weak useful signal from the strong noise in order to better understand the radiant features of weak signals. Nowadays, there are a lot of methods to be used in chaotic system to detect weak signals among which the Duffing system is often used. In this paper we conduct researches on several typical chaotic systems and their dynamic properties are analyzed. The purpose is to find promising chaotic model to detect weak signals and compare the detection precision with that of the Duffing system. The simulation results show that the high order chaotic system can detect the weak signal amplitude and the detected signal-to-noise ratio is even lower than that of the Duffing system. It is also shown that the presented method is feasible.