基于HHT变换的时频分析法及其在2FSK系统解调中的应用
Time-Frequency Analysis Method Based on HHT and Its Application in 2FSK Demodulation Systems
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摘要: 该文用一种非平稳信号时频分析方法(HHT变换)。该方法立足于信号本身特征，着重分析信号的瞬时频率分布，实现2FSK系统的解调。通过与传统解调方法的比较，论述了该方法在2FSK信号解调中的合理性和可行性。仿真结果给出了该方法在解调过程中的抗噪声性能，表明了该方法的有效性。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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樊昌信，张甫翎等. 通信原理.(第5版) 北京：国防工业出版社，2001, 第6章.[2]Mukund Padmanabhan, Ken Martin. Comparison of correllator configuration for FSK demodulation. IEEE InternationalSymposium on Circuits and Systems, May 1-3, 1990, vol.2: 1203-1206.[3]Shotaro Nishimura, Mvuma Aloys. A lattice-based adaptive IIR notch filter and its application to FSK demodulation. IEEE International Symposium on Circuits and Systems, Switzerland May 28-31, 2000: 586-589.[4]Xu Feng, Wang Peng, Dong Yong-gui. A real-time demodulation algorithms for FSK signals in railway tracks and its implementation[J].IEEE 2002 International Conference on Communications, Circuits and Systems and West Sino Expositions, Jun 29 - Jul .2002, vol.2:935-938[5]Shinsuke Hara, Attapol Wannasammaytha, Yuuji Tsuchida, et al.. A novel FSK demodulation method using short-time DFT analysis for LEO satellite communication systems[J].IEEE Trans on Vehicular Technology.1997, 46(3):625-633[6]Norden E. Huang, Zheng Shen, Steven R. Long, et al.. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis. Proc. R. Soc. Lond. A (1998) 454: 903-995.[7]Semion Kizhner, Thomas P. Flatley, Norden E. Huang, et al.. on the Hilbert-Huang transform data processing system development. 2004 IEEE Aerospace Conference Proceedings, 1961-1979. -
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