Multi frequency weak signals detection based on under-sampling bistable stochastic resonance

IF 0.7 Q4 ENGINEERING, MECHANICAL
Fang Jiaqi
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引用次数: 0

Abstract

Signal detection has a wide range of practical applications. Compared with traditional weak signal detection, the nonlinear effect of noise in the bistable system is typical and easy to extend, so bistable stochastic resonance detection technique has a wider applicability. In this paper, the multi-frequency weak signals detection based on under-sampling bistable stochastic resonance is studied. Based on the theory of bistable stochastic resonance, a simulation model is established to simultaneously detect multiple low-frequency weak signals. The spectrum of input and output signals is obtained through numerical simulation calculation, and the system characteristics are analyzed. When the large parameter signal does not meet the adiabatic approximation theory, the appropriate sampling coefficient can be selected to directly under-sample the input signal to make it conform to the conditions, and then the scale inverse transformation can be carried out. Finally, combined with the simulation analysis, the correctness of the under-sampling bistable stochastic resonance system to detect the multi-frequency weak signals is verified, the sampling rate is reduced, and the complexity is effectively decreased.
基于欠采样双稳态随机共振的多频微弱信号检测
信号检测具有广泛的实际应用。与传统的微弱信号检测相比,双稳态系统中噪声的非线性效应典型且易于扩展,因此双稳态随机共振检测技术具有更广泛的适用性。本文研究了基于欠采样双稳态随机共振的多频微弱信号检测。基于双稳态随机共振理论,建立了同时检测多个低频微弱信号的仿真模型。通过数值模拟计算得到输入和输出信号的频谱,并分析了系统特性。当大参数信号不符合绝热近似理论时,可选择合适的采样系数直接对输入信号进行欠采样,使其符合条件,然后进行尺度反变换。最后,结合仿真分析,验证了欠采样双稳态随机共振系统检测多频微弱信号的正确性,降低了采样率,有效降低了复杂度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Vibroengineering
Journal of Vibroengineering 工程技术-工程:机械
CiteScore
1.70
自引率
0.00%
发文量
97
审稿时长
4.5 months
期刊介绍: Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.
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