基于双耦合高阶Duffing振子系统的弱信号检测
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摘要
针对较强噪声背景下传统的弱信号检测方法存在的问题,提出了一种新颖的基于高阶Duffing振子的弱信号检测方法。阐述了其根据相图变化进行弱信号检测的工作原理,同时也对系统的抗噪性能进行了研究。构建了双耦合高阶Duffing振子系统,实现了对任意未知频率信号的检测,改善了系统的抗噪性。仿真实验证实了提出的方法能够更好地检测强噪声环境下的弱信号,对噪声具有更好的抑制作用,因此构建的振子用于实际微弱信号的检测具有可行性。
A novel weak signal detection method based on the higher-order Duffing oscillator under strong noise background is proposed.The fundamental principle of weak signal detection is described according to the transition of phase diagram and anti-noise performance of system is also studied.On the basis of this principle,a two-coupled higher-order Duffing oscillator system which can identify signals with any unknown frequency and has a better antinoise performance is proposed.Simulation experiments ultimately confirm that the weak signal in the strong noise background can be better detected by the method and the noise is better suppressed. The application of the oscillator in weak signal detection is feasible.
A novel weak signal detection method based on the higher-order Duffing oscillator under strong noise background is proposed.The fundamental principle of weak signal detection is described according to the transition of phase diagram and anti-noise performance of system is also studied.On the basis of this principle,a two-coupled higher-order Duffing oscillator system which can identify signals with any unknown frequency and has a better antinoise performance is proposed.Simulation experiments ultimately confirm that the weak signal in the strong noise background can be better detected by the method and the noise is better suppressed. The application of the oscillator in weak signal detection is feasible.
引文
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[4]谢涛,魏学业.混沌振子在微弱信号检测中的可靠性研究[J].仪器仪表学报,2008,29(6):1265-1269.
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[6]李月,石要武,马海涛,等.湮没在色噪声背景下微弱方波信号的混沌检测方法[J].电子学报,2004,32(1):87-90.
[7]李正周,丁浩,刘梅,等.实测海杂波光电图像混沌特性研究[J].传感器与微系统,2013,32(4):27-29.
[8]王晓东,杨绍普,赵志宏.基于改进型Duffing振子的微弱信号检测研究[J].动力学与控制学报,2016,14(3):283-288.
[9]赖志慧,冷永刚,孙建桥,等.基于Duffing振子的变尺度微弱特征信号检测方法研究[J].物理学报,2012,61(5):50503.
[2]毛骁骁,孙克辉,刘文浩.基于分数阶统一混沌系统的图像加密算法[J].传感器与微系统,2017,36(6):138-141.
[3]朱志宇,姜长生,张冰,等.基于混沌理论的微弱信号检测方法[J].传感器技术,2005,24(5):65-68.
[4]谢涛,魏学业.混沌振子在微弱信号检测中的可靠性研究[J].仪器仪表学报,2008,29(6):1265-1269.
[5]Peng H H,Xu X M,Yang B C,et al.Implication of two-coupled differential Van der pol Duffing oscillator in weak signal detection[J].Journal of the Physical Society of Japan,2016,85(4):1-8.
[6]李月,石要武,马海涛,等.湮没在色噪声背景下微弱方波信号的混沌检测方法[J].电子学报,2004,32(1):87-90.
[7]李正周,丁浩,刘梅,等.实测海杂波光电图像混沌特性研究[J].传感器与微系统,2013,32(4):27-29.
[8]王晓东,杨绍普,赵志宏.基于改进型Duffing振子的微弱信号检测研究[J].动力学与控制学报,2016,14(3):283-288.
[9]赖志慧,冷永刚,孙建桥,等.基于Duffing振子的变尺度微弱特征信号检测方法研究[J].物理学报,2012,61(5):50503.