EI、Scopus 收录
中文核心期刊
张莹 王太勇 冷永刚 邓辉 丁千. 双稳随机共振的信号恢复研究[J]. 力学学报, 2008, 40(4): 528-534. DOI: 10.6052/0459-1879-2008-4-2007-472
引用本文: 张莹 王太勇 冷永刚 邓辉 丁千. 双稳随机共振的信号恢复研究[J]. 力学学报, 2008, 40(4): 528-534. DOI: 10.6052/0459-1879-2008-4-2007-472
Ying Zhang, Taiyong Wang, Yonggang Leng, Hui Deng, Qian Ding. Study on signal recovery in bistable stochastic resonance[J]. Chinese Journal of Theoretical and Applied Mechanics, 2008, 40(4): 528-534. DOI: 10.6052/0459-1879-2008-4-2007-472
Citation: Ying Zhang, Taiyong Wang, Yonggang Leng, Hui Deng, Qian Ding. Study on signal recovery in bistable stochastic resonance[J]. Chinese Journal of Theoretical and Applied Mechanics, 2008, 40(4): 528-534. DOI: 10.6052/0459-1879-2008-4-2007-472

双稳随机共振的信号恢复研究

Study on signal recovery in bistable stochastic resonance

  • 摘要: 针对双稳随机共振输出波形失真的问题,从还原粒子运动轨迹的角度提出了波形恢复公式.通过将其应用于双稳系统对无噪阈上信号的响应输出,揭示了由粒子跃迁经过系统拐点引起的轨迹突变,及其在恢复波形的表现形式.鉴于阈下随机共振系统中噪声的随机影响,引入级联双稳系统对残余噪声进行二次调节,同时采用参数调节的恢复系统对波形进行恢复.数值仿真表明,该法直接应用于系统输出,适合处理有限长的时间数据,可以有效地估计噪声背景下微弱信号的时域波形.

     

    Abstract: Aiming at the problem of the waveshape distortion in the output obtained by an SR system, this paper explains the signal recovery formula from the point of view of dynamics. Taking sinusoidal signal as the research object, the motion of the particle in the bistable system and the recovery system is investigated, and the recovery mechanism and rules with and without noise are explained. Moreover, a novel explanation about pulse distortion caused by the particle’s transition is put forward and a method to recover the output signal of subthreshold SR via cascaded-bistable system and the recovery system’s parameter choice is proposed. The numerical simulation has presented that this method, which applies to the output signal directly, can recover the waveform containing weak information submerged in noise effectively.

     

/

返回文章
返回