Estimations of the signal information parameters in radio engineering systems

Radio engineering systems are used to monitor the environment and operate in difficult conditions with a large number of interferences of natural and artificial origin. Contamination of the frequency space by radiation sources places high demands on methods and means of signal processing of such systems, in particular methods of estimation of information parameters of signals, their amplitudes, phases, frequencies, modulation depths. A new approach is proposed to estimate the phase difference in VOR systems and the difference in the modulation depth of the radar signals of ground beacons of the ILS instrumental landing system using the maximum likelihood method, and based on the Fourier transform. One of the applications of the considered method in onboard computers for estimating the difference in modulation depth is shown. The stability conditions for the optimal estimation of the harmonic signal frequency to action and the parameters of impulse noise are analytically determined, which was confirmed by statistical modeling.