Перегляд за автором "Kovshar, V."

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  • Зображення мініатюри
    Публікація
    Consideration of Antenna Pattern by Elevation in Recommendation ITU-R P. 2001
    (IEEE, 2020) Chernov, A.; Kovshar, V.; Kaliuzhnyi, M.; Zheng Yu
    The question of the practical application of the comprehensive universal Recommendation ITU-R P.2001 in calculating the electromagnetic compatibility of electronic systems is considered. In this Recommendation antenna patterns are assumed isotropic in elevation plane. It is shown that to increase an accuracy of calculations by this technique, it is necessary to take into account the difference between the terminal antennas pattern and isotropic antennas. A detailed analysis of the propagation of radio waves sub-model for reflection from the sporadic layer E. The significant influence of the distance between the terminals and the types of their antennas on the calculation results for this sub-model. The quantitative corrections for typical short-wave and ultra-short wave antennas are determined. The directions of further research were selected to increase the accuracy of calculations of the propagation of radio waves when using the Recommendation ITU-R P.2001.
  • Зображення мініатюри
    Публікація
    Multi-Criteria Selection of the Preferred Protocol of Routing in Ad-Hoc Networks by Hierarchies Analysis Method
    (IJSR, 2019) Безрук, В. М.; Семенець, В. В.; Yu Zheng; Guo Qiang; Kovshar, V.; Semenets, V. V.; Bezruk, V. M.
    Wireless ad-hoc networks are mobile decentralized dynamic self-organizing networks that do not have a fixed structure. This technology of building a wireless network is relevant in situations where you need to quickly deploy a network in a territory with mobile nodes. This article discusses the features of applying the hierarchy analysis method for multi-criteria selection of the preferred routing protocol in ad-hoc networks from a number of options.