Domracheva K. Methods of increasing the noise immunity of telecommunication systems with multi-position signals

In the dissertation the actual scientific problem is solved, which consists in the development of a method for increasing the noise immunity of telecommunication systems with multi-position signals. The method of determining the energy of the radio link with different types of modulation is proposed, and the significant advantage of using the 4-position PSK signal is determined. The method of increasing the reliability of telecommunication systems with the use of multi-position amplitude-modulated signals for digital television using VSB technology has been developed. The technique of calculating the noise immunity of telecommunication systems at different quantities of positions of multiposition signals based on phase-difference modulation is improved, which, unlike the known ones, takes into account the value of the coefficient of change of the system's impedance, depending on the multiposition signal and the reduction of the interference effect. The method of using timer signal constructions to increase the noise immunity of the telecommunication system is proposed. The method of calculation of noise immunity of telecommunication systems with different types of modulation and choice of signal systems that are invariant to various kinds of noise is offered.