混沌测量电路耦合降噪研究

利用混沌系统的初值敏感性来测量极其微弱的信号,并通过混沌测量电路耦合来抑制噪声.研究由多个混沌测量单元构成的耦合系统,基于符号动力学原理,采用电路实验分析了耦合单元电路在参数相同和有些涨落时噪声抑制与混沌测量单元数之间的关系.实验结果表明, 在单元电路参数一致时通过耦合可以抑制噪声,并随混沌测量单元数的增加对噪声的抑制作用增强;而在参数有一定涨落时,抑制噪声的效果变差,且随耦合单元参数的涨落程度和干扰强弱而变化.

Study of noise reduction in coupled chaotic measurement circuits

Very weak signal was detected based on the property of chaotic system's sensitivity to initial conditions, and noise was reduced by coupling chaotic measurement circuits. A coupled circuit composed of chaotic measuring units was studied, and the relationship between noise reduction and unit number with (identical) or different parameters in coupled circuits was analyzed based on symbolic dynamics. The experiment results show that noise can be reduced by coupling chaotic measuring units with identical parameters, and can be more effectively reduced with larger unit number, but may become worse with different parameters, and may be different with the fluctuation of parameters and noise intensity.