Feng Guo, Cheng-Yin Zhu, Qiang-Ming Cai, Jian-Wei Wang
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引用次数: 0
摘要
研究了双稳态系统在信号调制噪声以及乘法和加法噪声作用下的随机共振（SR）现象。信号被模拟为随机相位不对称方波信号。根据绝热近似条件和双态理论，推导出了系统输出信噪比（SNR）。结果发现，当信噪比随方波信号的不对称而变化时，会出现双 SR 现象。当信噪比随方波信号的振幅变化时，会出现一个共振峰。在信噪比与信号调制噪声强度的关系曲线以及与乘法噪声和加法噪声强度的关系曲线上，可以观察到传统的 SR。讨论了信噪比与系统参数的非单调依赖关系。
Resonance behaviour for a bistable system driven by random-phase square-wave signal-modulated noise and multiplicative noise
The stochastic resonance (SR) phenomenon for a bistable system subject to signal-modulated noise and to multiplicative and additive noise is investigated. The signal is modelled as a random-phase asymmetric square-wave one. Based on adiabatic approximation condition and two-state theory, the system output signal-to-noise ratio (SNR) is deduced. It is found that double SR phenomenon occurs when the SNR varies with the asymmetry of the square-wave signal. One resonance peak appears when the SNR changes with the amplitude of the square-wave signal. Traditional SR can be observed on the curves of the SNRs vs. the strength of the signal-modulated noise and vs. the intensities of the multiplicative and additive noise. The non-monotonous dependence of the SNR on the system parameter is discussed.
期刊介绍：
Pramana - Journal of Physics is a monthly research journal in English published by the Indian Academy of Sciences in collaboration with Indian National Science Academy and Indian Physics Association. The journal publishes refereed papers covering current research in Physics, both original contributions - research papers, brief reports or rapid communications - and invited reviews. Pramana also publishes special issues devoted to advances in specific areas of Physics and proceedings of select high quality conferences.
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