A Novel Method of High Frequency Weak Signal Detection Based on Chaotic Oscillator System and Wavelet Transform System

Abstract:

Based on chaotic oscillator system and wavelet transform system, this paper proposes a novel method on high frequency weak signal detection. Chaotic system is a typical non-linear system which is sensitive to certain signals and immune to noise at the same time. Its properties demonstrate the potential application on weak signal detection. Due to the good localization in both time domain and frequency domain, the wavelet transform method can automatically adjust to different frequency components and increase the Signal-to-Noise Ratio. Starting from the analysis of advantages and disadvantages of two signal detection methods, we put forward a combined method that takes advantage of each method to detect weak signals with high frequency. The simulation results show that the novel method can detect weak signals with frequency in an order of magnitude of 10⁷Hz, and the input Signal-to-Noise Ratio threshold could be-42.5dB.

• Periodical: Applied Mechanics and Materials (Volumes 130-134)
• Pages: 2770-2773
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.130-134.2770
• Online since: October 2011
• Authors: Shuo Shi, Jin Yan Li, Xue Mai Gu
• Keywords: Chaotic System, High-Frequency, Wavelet Transform (WT), Weak Signal Detection

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