Sökning: "Beamforming"

Visar resultat 11 - 15 av 115 uppsatser innehållade ordet Beamforming.

  1. 11. Reconnaissance Radar Robot

    Uppsats för yrkesexamina på grundnivå, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Kasper Holm; Erik Henrysson; [2023]
    Nyckelord :radar; signal; processing; signal processing; state; machine; state machine; test; testing; radar testing; radar technology; frequency modulated continuous wave; fmcw; pulse radar; raspberry pi; single board computer; sbc; poe; power over ethernet; mqtt; mqtt package; python; drones; uav; unmanned aerial vehicle; drone detection; radar robot; swedish armed forces; swedish armed forces technical school; fmts; beamforming; fast fourier transform; fft; point cloud; point clustering; software design;

    Sammanfattning : During the last century, various countries' armed forces have used unmanned aerial vehicles, commonly known as drones. In recent years, strives have been made to develop small commercial drones that have allowed the general public to afford and use them for recreational purposes. LÄS MER

  3. 12. Initial access for 5G mmWave private networks

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

    Författare :Mei Li; [2023]
    Nyckelord :Private Network; Initial Access; Millimeter-Wave; Ray Tracing; Cell Search; Random Beamforming; Privat nätverk; Initial Access; Millimeter-Wave; Ray Tracing; Cell Search; Random Beamforming;

    Sammanfattning : This research delves into wireless communication systems, with a particular focus on initial access processes, channel modeling, and beamforming strategies. The study involves meticulous channel data collection across diverse urban, suburban, and rural terrains, each presenting unique propagation challenges. LÄS MER

  4. 13. Ultraljudtomografi av jordkropp -Invertering av två signaler

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Geoteknik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Gabriel Flores Huayllani; [2023]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Syftet med detta examensarbete är att vidareutveckla en analysmodell inom deformationslokalisering för att få en bredare kunskap om det mekaniska beteendet hos ett geomaterial. Undersökning av lokala egenskaper hos ett jordprov kräver en fullfältsmätnin-gsteknik som i detta arbete är ultraljudstomografi. LÄS MER

  5. 14. Beam selection using Machine Learning in Massive MIMO systems

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

    Författare :Simon Persson; [2023]
    Nyckelord :Massive MIMO; Beamforming; Machine Learning; 5G; NR; Antenna selection; Technology and Engineering;

    Sammanfattning : In mobile communications the demand for increased capacity and speeds is a constant. 5G NR is the latest generation which is now seeing widespread adoption. Crucial technologies like Massive MIMO and beamforming are enabled by the use of large antenna arrays. LÄS MER

  7. 15. Personalized Federated Learning for mmWave Beam Prediction Using Non-IID Sub-6 GHz Channels

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

    Författare :Yuan Cheng; [2022]
    Nyckelord :Personalized Federated Learning; Millimeter wave; Beamforming; DeepMIMO; Non-IID; Personaliserad Federad Inlärning; Millimetervågor; Strålformning; DeepMIMO; Icke-IID;

    Sammanfattning : While it is difficult for base stations to estimate the millimeter wave (mmWave) channels and find the optimal mmWave beam for user equipments (UEs) quickly, the sub-6 GHz channels which are usually easier to obtain and more robust to blockages could be used to reduce the time before initial access and enhance the reliability of mmWave communication. Considering that the channel information is collected by a massive number of radio base stations and would be sensitive to privacy and security, Federated Learning (FL) is a match for this use case. LÄS MER