Time-Frequency Analysis Method Based on HHT and Its Application in 2FSK Demodulation Systems
基于HHT变换的时频分析法及其在2FSK系统解调中的应用

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.