Study on the Performance of Chaotic Oscillator in Weak Signal Detection

Abstract:

For the frequency detection by using chaotic oscillator, in this paper, the results which are under the influence of the sampling frequency on the basis of theory that the output variance of the system will reach a maximum when the reference frequency equals to the signal frequency are analyzed. Experiments have indicated that the accuracy rate of the results will be improved and the signal to noise ratio (SNR) threshold will be reduced by increasing the sampling frequency to a certain degree. Besides, we have a further research on detecting the frequency of a signal with an initial phase based on the theory mentioned above, simulation experimental results have verified the output variance still has a drastic change when the reference frequency is equal to the signal frequency.

• Periodical: Applied Mechanics and Materials (Volumes 263-266)
• Pages: 516-520
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.263-266.516
• Online since: December 2012
• Authors: Yan Mang Su, Zhen Bin Gao, Xiao Zhe Liu, Na Zheng
• Keywords: Chaotic, Duffing Equation, Initial Phase, Sampling Frequency, SNR, Weak Signal Detection

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