Sökning: "satellite telecommunication"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden satellite telecommunication.

  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. Time synchronization error detection in a radio access network

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Moulika Madana; [2023]
    Nyckelord :GNSS - Global Navigation Satellite System; OAS - Over-the air-synchronization; PRTC - primary reference time clock; PTP - precision time protocol; Gauss Jordan elimination; GNN- Graph Neural Network; GNSS -Globalt navigationssatellitsystem; OAS - Över-the-air tidssynkronisering; PRTC - Primär referenstidklocka; PTP - Precisionstidprotokoll; Gauss Jordan eliminering; GNN- Graf neurala nätverk;

    Sammanfattning : Time synchronization is a process of ensuring all the time difference between the clocks of network components(like base stations, boundary clocks, grandmasters, etc.) in the mobile network is zero or negligible. It is one of the important factors responsible for ensuring effective communication between two user-equipments in a mobile network. LÄS MER

  4. 3. Communication and Error Correction via Polarisation of Single Photons and Time Ordering

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Shek Lun Leung; [2023]
    Nyckelord :Quantum Technology; Physics; Photon; Telecommunication; polarization; time ordering; BPPM; PPM; OOK; Simulation; quantum communication; Kvantteknologi; Fysik; Foton; Telekommunikation; polarisering; tidsordning; BPPM; PPM; OOK; Simulering; kvantkommunikation; satellite communication;

    Sammanfattning : This research study aims to investigate the capacity of single photons to carry information through polarization and time ordering and proposes a protocol called Beyond Pulse Position Modulation (BPPM) to improve photon-based communication reliability over longer distances with limited power. Such a protocol may be used in any communication scenario where energy efficiency is important, e. LÄS MER

  5. 4. Logistical consequences of rapid deliveries in omnichannel retailing : Investigating the impact of 15-minute deliveries on the demand management and order fulfilment process

    Master-uppsats, Linköpings universitet/Logistik- och kvalitetsutveckling

    Författare :Moa Andersson; Evelina Krassow; [2023]
    Nyckelord :Logistics; Supply chain management; Supply chain; Supply chain processes; Omnichannel; Omnichannel retailing; Consequences; Order fulfilment; Demand Managment; Process;

    Sammanfattning : The need for fast, flexible, and sustainable deliveries has become a key priority for companies as customers demand more convenience in their purchasing experience. Retailers have responded by developing their logistics into an omnichannel to meet these expectations, which has made the supply chain more complex. LÄS MER

  7. 5. Forest Growth And Volume Estimation Using Machine Learning

    Master-uppsats, Linköpings universitet/Datorseende

    Författare :Gustav Dahmén; Erica Strand; [2022]
    Nyckelord :machine learning; computer vision; forest; object detection; semantic segmentation; forest inventory; forest type; maskinlärning; datorseende; skog; objektdetektion; semantisk segmentering; skogsinventering; skogstyp;

    Sammanfattning : Estimation of forest parameters using remote sensing information could streamline the forest industry from a time and economic perspective. This thesis utilizes object detection and semantic segmentation to detect and classify individual trees from images over 3D models reconstructed from satellite images. LÄS MER