| 摘要 |
FIELD: radio engineering, communications.SUBSTANCE: method is based on combination of Wavelet transform and statistical assessment of signal parameters. According to the invention, assessment of parameters and demodulation of signals is carried out in two stages with application of a continuous Wavelet transform with fixed value of scale as primary processing, on the basis of the results of which they identify time moments of clock transitions of amplitude and phase, knowing which they find gaps of the signal, in which values of amplitude and phase are permanent. At the second stage in these gaps they use a statistical method of maximum likelihood for calculation of amplitude and phase estimates and signal demodulation. At the same time, having counted the number of clock transitions, they define the technical speed of transfer. Moreover, the method is serviceable at signal/noise ratios of more than 5 dB.EFFECT: possibility to define technical speed of transfer and demodulation of signals with amplitude, phase and amplitude-phase modulation in absence of a priori information about parameters of an input signal.4 dwg |
