随机共振理论在微弱信号检测中的应用研究  

Study on Application of Stochastic Resonance Theory in Weak Signal Detection

作　　者：段江海[1] 宋爱国[1] 王一清[1] 

机构地区：[1]东南大学仪器科学与工程系,南京210096

出　　处：《信号处理》2003年第6期569-572,共4页Journal of Signal Processing

基　　金：国家自然科学基金(No.69875004)

摘　　要：本文介绍了随机共振的基本原理,通过数值仿真研究了对称双稳系统的随机共振现象,并将其用于微弱信号的检测。为了进一步提高检测信噪比,采用了系统参数寻优的方法。仿真结果证明了基于随机共振的微弱信号检测方法的有效性。最后,提出了几个需要解决的问题。This paper introduced the basic principle of stochastic resonance (SR) and demonstrated SR phenomenon in symmetric bistable system by numerical simulation. Then, SR was applied to detect weak signal in a stronger noise background. To further enhance the output signal-to-noise ratio (SNR), the influence of system parameters was experimentally investigated and the optimal value was taken. The results obtained show the effectiveness of the detecting method based on SR. Finally, some problems for future research are proposed.

关 键 词：随机共振 微弱信号检测 信噪比 势函数 动力学系统 

分 类 号：TN911.6[电子电信—通信与信息系统]