|本期目录/Table of Contents|

[1]胡文静,刘志珍,厉志辉,等.用于微弱信号检测的改进Duffing混沌电路性能分析[J].电机与控制学报,2011,(09):80-85.
 HU Wen-jing,LIU Zhi-zhen,LI Zhi-hui.Weak signal detection performance of improved Duffing circuit[J].,2011,(09):80-85.
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用于微弱信号检测的改进Duffing混沌电路性能分析(PDF)
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《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
期数:
2011年09
页码:
80-85
栏目:
出版日期:
2011-09-20

文章信息/Info

Title:
Weak signal detection performance of improved Duffing circuit
作者:
胡文静; 刘志珍; 厉志辉;
山东大学电气工程学院;
Author(s):
HU Wen-jingLIU Zhi-zhenLI Zhi-hui
School of Electrical Engineering,Shandong University,Jinan 250061,China
关键词:
混沌 噪声 信噪比 阈值电压
Keywords:
chaos noise signal to noise ratio threshold voltage
分类号:
TN911.23
DOI:
-
文献标志码:
A
摘要:
针对已有Duffing混沌电路仅适用于低频微弱信号检测的问题,提出一种改进Duffing混沌电路,并在虚拟电子工作平台(Multisim)软件中用实际电子器件实现了该电路。适当调整该电路的参数,可实现从低频到高频的微弱信号检测。另外,通过Multisim仿真,对该电路在较高频率下检测微弱信号的性能进行研究。仿真研究表明:该电路对初始值非常敏感,当正弦信号的幅值稍微增加,电路就发生混沌态到大尺度周期态的临界相变,可进行较高频率下的微弱信号检测。通过加入热噪声,分析电路在噪声背景下检测微弱信号的能力,并求取了信噪比。对仿真结果分析发现:随着临界阈值精确度的增加,也即检测精确度的增加,信噪比越来越低的现象。
Abstract:
In order to solve the problem that the existing Duffing chaotic circuit applies only to low-frequency weak signal detection,an improved circuit designed using actual electronic devices is presented.Through adjusting the parameters of the circuit,it could detect weak signal from low frequency to high frequency.In addition,by the Multisim simulation of the circuit at higher frequencies,its detection performance was studied.Experiments show that the circuit is very sensitive to initial values,and i...

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备注/Memo

备注/Memo:
中国博士后科学基金特别资助(200801413)
更新日期/Last Update: 2012-04-06