Sökning: "International Telecommunication Union"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden International Telecommunication Union.

  1. 1. Satellite signal attenuation due to atmospheric influences in northern Sweden

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Adrian Stigsson; [2024]
    Nyckelord :;

    Sammanfattning : Earth-space traversing electromagnetic waves become attenuated as they propagate through the atmosphere. The sources of attenuation are weather phenomena in the Troposphere, and scintillation and absorption in the Ionosphere. LÄS MER

  3. 2. Effects of water-vapor on the Ka/Q band Earth-space radio propagation channel

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Joar Marchner Brandt; [2021]
    Nyckelord :Attenuation Alphasat Water-vapor Oxygen Cloud ITU Budapest;

    Sammanfattning : A higher frequency radio channel both increase the possible data rate and de- crease the required antenna size to efficiently transmit data. Higher frequency also introduce larger weakness to signal loss due to atmospheric effects. Al- phasat satellite conduct experiments for future use of higher frequencies by the Aldo Paraboni Payload. LÄS MER

  4. 3. QoE Performance Evaluation by Introducing Video Freeze on Mobile Multimedia

    Magister-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Yagna Brahma Sai Narapareddy; [2019]
    Nyckelord :qoe; quality of experince; Mean opinion scores; subjective test;

    Sammanfattning : Real time video streaming through mobile Internet is increasing day by day and the video  quality can be affected  very badly by network performance issues. Video freezing and video  jumping are one of the serious issues that affect the user experience badly. LÄS MER

  5. 4. Machine Learning Technique for Uplink Link Adaptation in 5G NR RAN at Millimeter Wave Frequencies

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Hazem Mohamed Abdelwahab Ibrahim Elgabroun; [2019]
    Nyckelord :Machine Learning; Link Adaptation; Reinforcement Learning; Technology and Engineering;

    Sammanfattning : The demands on wireless communications are continuously growing, due to the fact that when higher network capabilities are delivered, new features and applications are created, calling for even higher requirements. To keep pace with these demands and to allow new applications to rise, the limits of mobile networks must be pushed regularly. LÄS MER

  7. 5. RF system for mmWave massive MIMO

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Ziqi Zhou; Jingwei Wang; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Due to rapid developments in communication technology, it is likely that 5G networks will be rolled out in 2019. To adapt to 5G, hardware will have to develop to meet the requirements of this new technology. The mmWave communication is one of the main elements of 5G technology. LÄS MER