Abstract：To the FM signals demodulation using Hilbert transformation, some problems are introduced. To the window length of de-convolution of Hilbert transformation, the experiment results show, when the window length is longer than both 100 points and the carrier wave period, the results are good. To obtain the real frequency from the phase series by differential method, a novel method is presented to overcome the lower precise results, First of all, it must be eliminating trend part by terminal base line method, and then, multi-point difference is used. And the good demodulation results of FM signal are gotten. Through demodulation experimentation in one sampling series of FM signals. The validity and feasibility are proved and it must be a novel processing method of de-modulation FM signals using Hilbert transform.
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2016, Vol. 37 
