Detecting Method of Weak Sine Signal with Initial Phase
Generally, the detecting signal methods based on the chaos theory always cope with the signal whose phase angle is zero. On this basis, this paper expands the method of chaos theory to the situation that the phase angle does not equal zero. According to initial phase angle of different detected signal, different driving force value automatically is set up. Output states of the system are detected from chaotic critical state to cycle state by automatically searching threshold value. Then make the system go back to chaotic critical state again by regulating the driving force value. Lastly, the amplitude and phase angle are solved by corresponding algorithm. This method can further perfect and supplement former methods. The simulation results indicate that this method can enhance the detecting performance of system and improve the measurement precision.
Weak sine signal initial phase chaos Duffing equation signal detection
Nie Chunyan Wang Hao Guo Wenfeng
Electronic Information Institute,Changchun Univ,Chang chun 130022 China Comunication Institute,Jilin Univ,Chang chun 130025 China
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）