二次采样随机共振频谱研究与应用初探  

Power spectrum research of twice sampling stochastic resonance response in a bistable system

作　　者：冷永刚[1] 王太勇[1] 秦旭达[1] 李瑞欣[1] 郭焱[2] 

机构地区：[1]天津大学机械工程学院,天津300072 [2]中国煤炭经济学院计算机系,烟台264005

出　　处：《物理学报》2004年第3期717-723,共7页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :5 0 175 0 81);国家高技术研究发展计划 (批准号 :2 0 0 2AA414 42 0 )资助的课题~~

摘　　要：研究了双稳系统随机共振频谱的洛伦兹分布特征 ,得出在谱分布能量较集中的低频区才能产生可辨识的随机共振谱峰 .探讨了大参数信号双稳系统的二次采样随机共振的频谱特性 .以强噪声中弱信号的检测为实例 。The characteristics of Lorentzian distribution in the power spectrum of a stochastic resonance(SR) from a bistable system have been investigated, and then the viewpoint of producing an identifiable SR peak only at the lower frequency area where the power energy being concentrated has been proposed. With big values of parameters, the spectral properties of a twice sampling stochastic resonance(TSSR) from a bistable system is probed in detail. Take the detection of a weak signal overwhelmed in heavy noise as an example, the application of the TSSR technique is shown finally.

关 键 词：随机共振 二次采样随机共振 双稳系统 洛伦兹分布 噪声作用 信号处理理论 信号参数 

分 类 号：TB53[理学—物理]