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    Wyświetlanie 1-3 z 3
    Tytuł:
    On Ability of Troubleshooting by Observing Some Physical Layer Parameters of xDSL Transceivers
    Autorzy:
    Škaljo, N.
    Begović, A.
    Turajić, E.
    Behlilović, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/963930.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrical parameters
    IPTV
    physical layer parameters
    QoS parameters
    troubleshooting testing
    xDSL
    Opis:
    This article presents a review of the investigation of the possibility of increasing the efficiency of existing line test solutions for troubleshooting testing for IPTV over xDSL, by the results of experimental research on real system under commercial exploitation. At the beginning of this article the main weaknesses of the existing troubleshooting testing are described. In the continuation of the article the physical layer parameters of xDSL transceiver are listed. This article also provides a few specific examples of xDSL lines with their physical layer parameters of xDSL transceivers followed by analysis how they can be used for the purposes of more efficient measurement of parameters of copper pairs.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 3; 365-372
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparing Gausian and exact models of malicious interference in VLC systems
    Autorzy:
    Blinowski, Grzegorz
    Mościcki, Adam
    Powiązania:
    https://bibliotekanauki.pl/articles/225996.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    visible light communication networks
    network security
    physical layer security
    transmission jamming
    Opis:
    Visible Light Communication (VLC) is a technique for high-speed, low-cost wireless data transmission based on LED luminaries. Wireless LAN environments are a major application of VLC. In these environments, VLC is used in place of traditional systems such as Wi-Fi. Because of the physical characteristics of visible light, VLC is considered to be superior to traditional radio-based communication in terms of security. However, as in all wireless systems, the security of VLC with respect to eavesdropping, signal jamming and modification must be analyzed. This paper focuses on the aspect of jamming in VLC networks. In environments where multiple VLC transmitters are used, there is the possibility that one or more transmitters will be hostile (or "rogue"). This leads to communication disruption, and in some cases, the hijacking of the legitimate data stream. In this paper we present the theoretical system model that is used in simulations to evaluate various rogue transmission scenarios in a typical indoor enviro.The typical approach used so far in jamming analysis assumes that all disruptive transmissions may be modeled as Gaussian noise, but this assumption may be too simplistic. We analyze and compare two models of VLC jamming: the simplified Gaussian and the exact model, where the full characteristics of the interfering signal are taken into account. Our aim is to determine which methodology is adequate for studying signal jamming in VLC systems.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 2; 277-286
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PCA Based Components Selection Criteria for Computationally Efficient Physical Layer Key Generation (PLKG) System
    Autorzy:
    Sarsodia, Tapesh
    Bhatt, Uma Rathore
    Upadhyay, Raksha
    Bhat, Vijay
    Powiązania:
    https://bibliotekanauki.pl/articles/27311925.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    wireless networks
    received signal strength
    principal component analysis
    physical layer key generation
    Mean
    Histfit
    Opis:
    Data security is one of the prime concerns in wireless networks. PLKG has been emerging as an attractive alternative to traditional cryptographic techniques. PLKG is more computationally efficient than cryptography. Moreover, PLKG using Principal component analysis (PCA) as pre-processing may further save computations. This paper proposes three mechanisms to select components of PCA which are based on Information content, Mean and Histfit. Bit Disagreement Rate (BDR) is compared for each mechanism. Histfit based method is found to be best. Since only two components are supposed to be processed for key generation, it is computationally efficient/ power efficient too.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 2; 361--369
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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