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Your search keyword '"Serhii Osypchuk"' showing total 13 results
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13 results on '"Serhii Osypchuk"'

4. CRITERIA AND ALGORITHMS FOR SHAPING OF THE SIGNAL-CODE SEQUENCES ON THE BASIS OF WI-FI TECHNOLOGY AT DEPLOYMENT OF THE TERAHERTZ BAND TELECOMMUNICATION SYSTEM

Author

Serhii Osypchuk, O. V. Lutchak, Leonid Uryvskyi, and T. M. Narytnyk

Subjects
Engineering, Basis (linear algebra), Software deployment, business.industry, Terahertz radiation, Telecommunication channels, Code (cryptography), Electronic engineering, Throughput, Electrical and Electronic Engineering, business, Telecommunications, Signal
Published
2015
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5. Applied research of modulation-coding schemes selection algorithms effectiveness in 802.11 equipment

Author

Serhii Osypchuk, Leonid Uryvsky, and A. Moshynska

Subjects
Computer science, Network packet, Applied research, Algorithm, Modulation coding, Characteristic energy, Energy (signal processing), Selection (genetic algorithm)
Abstract

In modern 802.11 equipment the algorithms are implemented that control MCS (Modulation-Coding Schemes) selection depending on the statistical data of successfully transmitted and lost data packets, without taking into account the energy conditions in the communication channel. In this paper, an applied experiment is performed in point-to-point (PtP) link with the study of the algorithm for MCS switching using the same communication equipment, with manual changing energy conditions in the communication channel. As a result, the correspondence was obtained for the MCS of 802.11n standard and communication channel energy characteristics, what is opposite to the statistical data of transmitted and received packets.

Published
2017
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7. OFDM SIGNAL ENERGY CHARACTERISTICS RESEARCH IN CHANNEL WITH PERMANENT PARAMETERS

Author

Leonid Uryvskyi and Serhii Osypchuk

Subjects
Computer Science::Performance, Computer science, Orthogonal frequency-division multiplexing, Computer Science::Networking and Internet Architecture, Electronic engineering, Computer Science::Other, Computer Science::Information Theory, Communication channel
Abstract

The simulation model for OFDM (Orthogonal Frequency Division Multiplexing) signal energy characteristics research is developed. The OFDM signal vector-phase states are examined. The momentary amplitudes distribution function is obtained. A hypothesis of amplitude distribution law is verified by the X2 criterion. The OFDM subcarriers optimal gain method is proposed.

Published
2013
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9. The 802.11 protocols usage for wireless systems construction with flexible architecture

Author

Bogdan Shmigel, Serhii Osypchuk, and Leonid Uryvsky

Subjects
020301 aerospace & aeronautics, Decision support system, Engineering, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 020206 networking & telecommunications, 02 engineering and technology, Field (computer science), 0203 mechanical engineering, Embedded system, 0202 electrical engineering, electronic engineering, information engineering, Wireless systems, Architecture, business
Abstract

The paper consiaers construction 01 wireless systems with flexible architecture based on the 802.11 standards. Advantages of such approach are reviewed. Theoretical analysis, laboratory tests and field trials of communication backbone line for system with flexible architecture are performed.

Published
2016
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10. Algorithm of choice a multiposition keying in wireless system with LDPC coding

Author

Serhii Osypchuk, Leonid Uryvsky, and Alina Moshynska

Subjects
Base station, Computer science, business.industry, Bit error rate, Wireless, Keying, Mobile telephony, Low-density parity-check code, business, Algorithm, Coding (social sciences), Phase-shift keying
Abstract

The algorithm of choice an optimal combination of multiposition keying and antinoise code is proposed in this paper. The criterion for selecting the optimal combination is the maximal productivity in base station coverage area of mobile communication.

Published
2014
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