Milyh M. Development and research of algorithms of optimum reception of multiitem signals of multichannel modems.

Work is devoted to research of principles of construction of modern modems with the speeds close to throughputs of channels. Reports, methods of modulation and formation of signals are analysed. Multichannel modems with orthogonal signals, invariant to linear distortions, pulse handicapes and short-term interruptions of the channel are offered. On the basis of results of calculations it is possible to draw a conclusion, that their noise stability is close to potential. It is investigated, that signals with phase-difference modulation of high orders can be accepted with the help of algorithms of coherent, optimum not coherent and autocorrelation reception. It is shown, that phase- difference modulation of the second order invariantion to frequency of bearing (carrying) fluctuation. The general (common) algorithms of formation and processing of signals with phase-difference modulation k the order are developed. Systems, invariant to an additive handicap as harmonious fluctuation with casual amplitude,frequency and a phase are investigated. Results of this thesis were implemented into UNDIZ deliverables and study process of higher educational Institute on communications. The area of implementations is telecommunication systems.