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《Journal of Transducer Technology》 2005-05
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Weak signal detection based on chaotic theory

ZHU Zhi yu 1, JIANG Chang sheng 1, ZHANG Bing 2, LIU Wei ting 2 (1.Coll of Automation Engin,Nanjing University of Aeronautics and Astronautics,Nanjin 210016,China; 2.Dept of Elct and Info,Jiangsu University of Science and Technology,Zhenjiang 212003,China)  
The chaotic characteristic of intermittent chaotic model——Duffing oscillator is analyzed,the nonequilibrium phase change of oscillator is sensitive to small signal and immune against white noise and the periodic interfering signal having larger angular frequency difference to the referential signal.The chaotic oscillator array is applied to detect weak signal in noise background,and Melnikov method is adopted as chaotic criterion which is easy to be directly calculated.The simulation results indicate this detection method is simple and effective.Detection precision is high.
【Fund】: 船舶工业国防科技应用基础研究基金资助项目(01J3.17)
【CateGory Index】: TN911
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