基于LabVIEW的随机共振高频微弱信号检测系统

摘要

Aiming at the problem that the failure of the high frequency weak signal detection based on the classical stochastic resonance( SR) method, a new method of parameter-tuning SR for the detection weak signal of high frequency was proposed, and then with LabVIEW and MATLAB as development platform, the system of detecting the radio weak signal of high frequency was built by using the method of parameter-tuning stochastic resonance.According to the characteristics of the signal to be detected, SR was induced by adjusting the system parameters, then the weak signal of the high frequency was realized.At last the received actual radio signals were used with noise as research data, the experimental results show that the detection system can realize the high frequency weak signal under the strong noise background effectively, and has friendly man-machine interface, which has good operability and practical significance.%针对经典随机共振方法对高频微弱信号检测失效的难题,提出一种调参随机共振检测高频微弱信号的方法,并以LabVIEW和Matlab为开发平台,利用调参随机共振方法构建了检测无线电高频微弱信号系统.该检测系统能够根据待测信号的特征,通过调节系统参数诱发系统发生随机共振,从而实现对高频信号的检测.最后对实际中无线电含噪信号进行检测,实验结果表明,该系统人机界面友好,能够有效地检测出强噪声背景下的高频微弱信号,具有良好的可操作性和现实意义.