用特定的混沌系统检测弱周期脉冲信号

The Detection of Weak Periodic Impulse Using the Special Chaotic System

用修正的 Duffing - Homes方程 {x+kx- x3+[1+αδT(t) ]x5=γsin(ωt) }构成特定的混沌系统 ,实现了强噪声背景下周期脉冲信号的有效检测 ,仿真实验表明该混沌系统对微弱周期脉冲信号非常敏感 ,对任何零均值噪声均具有极强的抑制能力。系统信噪比工作门限可达到 - 83 d B.

The periodic impulse signal under strong noise background is successfully detected with a special chaotic system which is formed of the modified Duffing-Homes equation{+k-x 3+[1+αδ T(t)]x 5=γsin(ωt)}advanced by the authors.Simulation experiments show that the chaotic system is sensitive enough to correspond to weak periodic impulse signal and it can effectively restrain the strong noise.The system has a stable working-detection limit of -83dB.