Перегляд за автором "Martynchuk, A."

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  • Зображення мініатюри
    Публікація
    Improving the quality of MIMO technologies of perspective communication channels when using polarized orthogonal data
    (ХНУРЕ, 2019) Ayodele Tega Ajadi; Martynchuk, A.
    In this article was derived method of finding the field components of the antenna signal and background noise, or processing in antenna with full polarization receiver. This will result to increase of bit rate of MIMO system on the basis of the use of polarization properties of signals, in the case of a real product. MIMO technology with orthogonal polarizing channels additional provides increase signal to noise ratio and therefore increase in bit rate in wireless net.
  • Зображення мініатюри
    Публікація
    Method to improve the quality of the local access point based on mixed polarization of MIMO antenna
    (ХНУРЕ, 2019) Masocha, S. M.; Martynchuk, A.
    The given work is devoted to increase of carrying capacity of Wi-Fi channel with MIMO by use the mixed polarization antenna system and orthogonal data coding. We investigate how this depends on the array geometry and the electric field polarization. Moreover, we validate our theoretical predictions with measurements above a nearly perfectly flat surface
  • Зображення мініатюри
    Публікація
    Out-of-band radiation in information processing equipment measurement of communication systems
    (ХНУРЕ, 2023) Kadatskaja, О.; Yerrafiq Muad,; Martynchuk, A.; Saburova, S.
    In work investigating methods for detecting and analyzing OBR, using statistical method for evaluating the quality indicators of developed OBR mitigation methods based on mathematical modeling. Is propose methods of using SDR receivers to detect and analyze electromagnetic emissions and reducing OBR to improve the security of electronic devices can be applied in the field of measurement and in organizing the protection of information systems.
  • Зображення мініатюри
    Публікація
    Out-of-band radiation in information processing equipment measurement using software tools
    (ХНУРЕ, 2023) Kadatskaja, О.; Yerrafiq Muad; Martynchuk, A.; Saburova, S.
    In work investigating methods for detecting and analyzing OBR, using statistical method for evaluating the quality indicators of developed OBR mitigation methods based on mathematical modeling. Is propose methods of using SDR receivers to detect and analyze electromagnetic emissions and reducing OBR to improve the security of electronic devices can be applied in the field of measurement and in organizing the protection of information systems.
  • Зображення мініатюри
    Публікація
    Out-of-band radiation in information processing equipment measurement using software tools.
    (ХНУРЕ, 2023) Kadatskaja, О.; Yerrafiq, Muad; Martynchuk, A.; Saburova, S.
    The purpose of work is which includes addressing the concern of OBR as a potential cyber-attack vector, exploring the potential of software-defined radio (SDR) receivers, evaluating the effectiveness of SDR-based solutions, identifying vulnerabilities in information processing equipment, and contributing to the existing knowledge on OBR and its impact on cybersecurity. The suggested approach revolves around leveraging SDR receivers to detect and analyze OBR signals, developing new security mechanisms, conducting experiments and simulations to evaluate effectiveness, identifying vulnerabilities, and proposing robust security measures.
  • Зображення мініатюри
    Публікація
    Some limitations of evaluating dual-polarized MIMO channel capacity
    (ХНУРЕ, 2020) Martynchuk, A.; Zubrytskyi, H.; Xuan, Li; Martynchuk, O.
    This article discusses possible bandwidth limitations of a radio access channel using MIMO technology with polarization-orthogonal channels, or dual polarization channels. The main attention is paid to the presence of cross-polarization isolation between channels, or cross-polarization relation, or Cross Polar Discrimination. The indicated ratio is determined mainly by the design features of the antennas. It is proposed to choose antennas with the minimum required values of cross-polarization ratio, which limit a given channel bandwidth.