基于双耦合改进型混沌振子系统的弱信号检测  

Weak Signal Detection Based on Improved Chaotic Oscillator System with Dual Coupling

作　　者：孙清文[1] 张金锋[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094

出　　处：《计算机与现代化》2012年第1期17-21,共5页Computer and Modernization

摘　　要：介绍传统的单Duffing混沌振子系统检测微弱信号的原理。传统混沌检测弱信号方法中,在强噪声环境下检测弱信号时系统易出现相位变化不稳定、抗噪性需进一步增强等问题。针对这些问题,本文提出基于双Duffing耦合改进型振子系统来对强噪声环境下的弱信号进行检测的方法,并用此方法对强噪声下的微弱正弦信号进行检测仿真。通过仿真得出双耦合改进型混沌振子系统能够更好地检测强噪声环境下的弱信号,对噪声有着更好的抑制作用。The traditional weak signal detection theory based on single Duffing chaotic oscillator system is described. In the traditional method based on chaos theory for detection of weak signals in strong noise environment, there prone to be instability in the phase change of system and the anti-noise should also be further enhanced. For solving the problems, the method of detecting the weak signal in strong noise environment based on double Duffing coupled improved oscillator system is proposed, and the weak sinusoidal signal detection in strong noise environment is finished the simulation by using this method. By simulation, the result is that based on the system of two-coupled improved chaotic oscillator, the weak signals in the strong noise environment can be better detected and the noise is better suppressed.

关 键 词：双Duffing 耦合 改进型振子 微弱信号检测 噪声抑制 

分 类 号：TN911.23[电子电信—通信与信息系统]