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| Time-Frequency Analysis Method Based on HHT and Its Application
in 2FSK Demodulation Systems |
| Mao Wei; Jin Rong-hong; Li Jia-qiang; Geng Jun-ping; Fan Yu |
| School of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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Abstract A time-frequency analysis method, named HHT(Hilbert-Huang Transformation), is applied to the demodulation of 2FSK systems. This method, based on the characteristics of the signal itself, is often used to analyze the instantaneous frequency distributions for non-stationary signals, and in this thesis, it is adopted to realize the demodulation of 2FSK systems. The rationality and feasibility in the process of demodulation is discussed by comparison with traditional methods. Simulation results prove the anti-noise capability and demodulation effectiveness of this new method.
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Received: 21 April 2005
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2006, Vol. 28 
