| 基于Duffing振子的噪声背景下微弱周期信号检测 |
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| 引用本文： | 叶亦能,王林泽.基于Duffing振子的噪声背景下微弱周期信号检测[J].机电工程,2009,26(4):97-100. |
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| 作者姓名： | 叶亦能 王林泽 |
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| 作者单位： | 杭州电子科技大学,计算机学院,浙江,杭州,310018;杭州电子科技大学,计算机学院,浙江,杭州,310018 |
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| 摘 要： | 为有效地实现噪声背景下弱信号的提取，阐述了间歇混沌模型Duffing振子的混沌特性。利用Duffing振子对微弱信号具有敏感性、对噪声与频率差较大的周期干扰信号具有免疫力的特性，研究了基于Duffing振子在噪声条件下检测微弱周期信号、复合频率信号和未知频率信号的方法，用数值仿真验证了该方法的可行性。研究结果表明，基于Duffing振子的信号检测方法对极微弱周期信号检测有其独到的优势，其频率误差率在控制范围之内。
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| 关 键 词： | 混沌 Duffing方程 大尺度周期状态 |
Weak periodic signal detection under the background of the noise based on Duffing oscillator |
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| YE Yi-neng,WANG Lin-ze.Weak periodic signal detection under the background of the noise based on Duffing oscillator[J].Mechanical & Electrical Engineering Magazine,2009,26(4):97-100. |
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| Authors: | YE Yi-neng WANG Lin-ze |
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| Affiliation: | School of Computer;Hangzhou Dianzi University;Hangzhou 310018;China |
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| Abstract: | The chaos characteristic of the intermittent Duffing oscillator model was analyzed,for extracting weak signals in noise effectively.Duffing oscillator is sensitive to weak signal and immune against the noise and the periodic interference signal having larger frequency difference.According to this characteristic,the method of detecting the weak periodical signals,complex-frequency signals,and unknown frequency signals in noise was studied based on characteristic of the Duffing oscillator.And the feasibility ... |
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| Keywords: | chaos Duffing equation large-scale periodic state |
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