| 范卫姣,王辅忠,张光璐.滤波器与随机共振结合检测微弱信号[J].,2015,34(2):169-174 |
| 滤波器与随机共振结合检测微弱信号 |
| Detecting weak signals by combining stochastic resonance with filter |
| 投稿时间：2014-05-30 修订日期：2015-03-01 |
| 中文摘要: |
| 基于双稳随机共振系统及滤波器的不同特性，本文提出了一种将两者结合起来检测微弱信号的方法，先用自适应前置滤波器对输入信号进行滤波，再使其通过双稳随机共振系统，进而检测出微弱信号。对比只有滤波器或双稳随机共振的系统，仿真结果表明此时的输出信号频谱幅度得到了很大的提高，且周围的干扰信号也得到了明显的削弱，即两者的结合使用可以更好的检测出微弱信号，而且结论表明低频区域的噪声对随机共振的产生影响较大，这对强噪声背景下的信号检测有很强的实用性。 |
| 英文摘要: |
| Making full use of the characteristics of stochastic resonance and filter, this paper design an adaptive system to detect weak signals detection by combining them. A adaptive pre-filter is used to first filter input signal and noise, then make them pass the bistable SR system. Observing the output, simulation results presents the spectrum amplitude of it has been greatly improved than the one that only have filter or bistable SR system. This indicates the combination of the two can better detect the weak signal and we demonstrate that the low frequency noise has more significantly impact on SR. So this will has a better practicability for detecting the weak signal embedded in strong noise . |
| DOI：10.11684/j.issn.1000-310X.2015.02.015 |
| 中文关键词: 随机共振 滤波器 自适应 频谱幅度 |
| 英文关键词: stochastic resonance, filter, self-adaptation,spectrum amplitude |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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