电测与仪表2012，Vol.49Issue(7)：37-40,4.
基于锁相环和浞沌振子的微弱信号检测
Weak Signal Detection Based on Phase Locked Loop and Chaotic Oscillator
摘要
Abstract
In order to detect accurately the amplitude and frequency of a nV-level sine signal,a hybrid detection system of weak signal based on phase locked loop and chaotic oscillator was built.First,by locking the measured signal which is input to phase locked loop,the signal frequency detection is completed.Then,taking the phase locked loop output signal whose frequency is known as the internal motive power signal of the chaos system,the amplitude of the input measured signal to the chaos system can be detected by Duffing oscillator.Simulation results show that: the hybrid system can detect the frequency and the amplitude of a nv-level weak signal at the same time; the lowest SNR of the signal is -22.23dB,and the hybrid system is easy to operate,which needs small amount of work and is easy to realize.关键词
混沌系统/Duffing振子/锁相环/微弱信号Key words
chaos system,Duffing oscillator,phase locked loop,weak signal分类
信息技术与安全科学引用本文复制引用
张瑜,贺秋瑞..基于锁相环和浞沌振子的微弱信号检测[J].电测与仪表,2012,49(7):37-40,4.基金项目
国家自然科学基金资助项目(61077037) （61077037）
