A Symbol Rate Estimation Method Based on Instantaneous Frequency Spectrum
Hui Zhao · Journal of Electrical & Electronic Education · 2010
In digital radio communication,symbol rate estimation is very important to modulation recognition,blind demodulation of non-cooperative communication and radio monitoring etc.A symbol rate estimation method based on the instantaneous frequency spectrum is introduced in this paper.First,real signals are turned into complex signals by means of Hilbert transform,then differential method makes the instantaneous frequency of the signals.And then Fourier transformation results in the instantaneous frequency spectrum.At last,the transform result brings the estimation of the symbol rate.Simulation and actual signals processing indicate,the method is simple,it has less complexity,it is influenced less by the noise,roll-off coefficients and the carrier frequency.And so the method is effective.