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Hittade 5 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Antenna Options for High Altitude IMT Base Stations (HIBS) in Cellular Networks

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Harald Magnusson; [2022]
    Nyckelord :High altitude IMT Base Station HIBS ; High Altitude Platform Station HAPS ; Link Feasibility; Coverage Feasibility; Phased Array Antenna; Parabolic Reflector Antenna;

    Sammanfattning : This thesis is the result of a collaboration between Ericsson AB and Luleå University of Technology. A feasibility study has been conducted to investigate antenna options for the HIBS access link. The study contains two parts. Firstly, a link budget investigating the gain required from the antenna. LÄS MER

  3. 2. Positioning in Non-Terrestrial Networks

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

    Författare :Soha Emara; [2021]
    Nyckelord :positioning; 5G; satellite; NTN; Technology and Engineering;

    Sammanfattning : In 5G communications, Non-terrestrial Network (NTN) is envisioned to complement Terrestrial Network (TN) to increase network availability, scalability and continuity. Positioning of User Equipment (UE) is critical for the operation of NTN. Currently, NTN uses Global Navigation Satellite System (GNSS) for positioning. LÄS MER

  4. 3. Improving the System Performance of High Altitude Platforms Serving Suburban Areas

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Md. Al-Mahadi Hasan; Mainul Islam; [2012]
    Nyckelord :3G; High Altitude Platform HAP ; Roll off factor; Suburban Region; Shadowing Loss.;

    Sammanfattning : High Altitude Platforms (HAP) has been evolving to make a new history in wireless communications infrastructure. A number of applications and services have been proposed for HAP based communications which advance HAP over terrestrial and satellite infrastructure for future communications. LÄS MER

  5. 4. STRATOSHPHERIC CHANNEL MODELLING

    Magister-uppsats, Blekinge Tekniska Högskola/Avdelningen för signalbehandling

    Författare :OLUWASEYI AWONIYI; [2007]
    Nyckelord :AWGN; BER; HAP; DQPSK; QPSK;

    Sammanfattning : High Altitude Platform Stations (HAPs) are communication facilities situated at an altitude of 17 to 30 km and at a specified, nominal, fixed point relative to the Earth. They are mostly solar-powered, unmanned, and remotely-operated. LÄS MER

  7. 5. Stratospheric Propagation And HAPs Channel Modeling

    Magister-uppsats, Blekinge Tekniska Högskola/Avdelningen för telekommunikationssystem

    Författare :ANDREW AYOOLA OLUSEYI OLADIPO; [2007]
    Nyckelord :HAPs; BER; channel model; stratospheric propagation;

    Sammanfattning : High Altitude Platform Stations (HAPs) are communication facilities situated at an altitude of 20 to 50 km and at a specified, nominal, fixed point relative to the Earth. They are mostly solar-powered, unmanned, and remotely-operated. LÄS MER