T. N. Narytnik

Analysis of signal transmission COFDM by means of radio-relay lines

The results of theoretical and experimental investigations of signal transmission COFDM by means of radio-relay line with the use of apparatus “Evrika” in the frequency range 12,75 - 13,25 GHz are presented. It has been proved that transmission rate increased in 2 times, communication range in 2-4 times in comparison with RRL with QPSK modulation due to higher energetic and spectral characteristics of RRL with OFDM.

Current status, attempts of implementation, technological development of on-air broadcasting of standard DVB-T

On the basis of current status of tecnologies of broadcasting it is shown that the method of information gaining by means of surface-mounted off-the-air networks is the most effective instrument of implementation of the systems of multifunction information service and integration of digital processing allows realizing of principally new approach to the television broadcasting. The single-frequency areas of synchronous broadcasting of standard DVB-T with the use of traffic currents of modulations MPEG-4, KAM-64 are considered. The results of complex investigations and the operation and maintenance of developed in Ukraine, implemented and put into production domestic radio tuner “Meridian”, digital transmitters and receiving antennas are submitted. The development trends of technologies of digital air brodcasting have been analized.

Integrated former of high-speed data traffic and tv for radio links digital updating

Presented in this paper are the results of research regarding increasing of telecommunication systemspsila spectral and power efficiency due to two-level modulation.

Microwave telecommunication system with increased spectral efficiency

Described in this paper is MITRIS-based telecommunication system MITRIS-MUI using combined modulation with increased spectral efficiency and possibility of serving the wider area. Engineering solution of MITRIS-MUI meets the requirements of resource-economy and ecological safety.

Rendering System of Multimedia Services

The present report is dedicated to system definition of the services for data communication, namely Internet access, computer data exchange, digital television broadcast etc. The aim of the described system is assignment of total velocity no less than 802.16 systems operating under conditions of indirect visibility and functioning on distance up to 60 km, providing computer data transfer, IP-broadcasting, as well as broadcasting in MPEG-2 format. System consists of two subsystems rendering services in different zones with different model channels.This system allows solving a problem of service for vast territory with different types of the model channels.

UMDS multipurpose multimedia distribution system

At present the systems of broadband wireless access have reached high levels of technological sophistication and constitute an important part of national telecommunications infrastructure in addition to cable, fiber-optic and satellite communications. A new strategic trend is the implementation of microwave technologies providing the synthesis between TV and Internet at a qualitatively higher level. This report describes the UMDS multipurpose multimedia distribution system based on technologies and engineering solutions applied in various versions of MITRIS.

Microwave integrated television and radio information system

The paper summarizes the results of development of a microwave integrated TV, radio, and information systems operating in the frequency range between 27.5 and 29.5 GHz and designed for distribution of analog and digital information. The prospects for the system development are discussed.