Sökning: "QPSK"

Visar resultat 1 - 5 av 28 uppsatser innehållade ordet QPSK.

  1. 1. Channel Estimation Optimization in 5G New Radio using Convolutional Neural Networks

    Master-uppsats, Karlstads universitet/Institutionen för matematik och datavetenskap (from 2013)

    Författare :David Adolfsson; [2023]
    Nyckelord :Channel Estimation; 5G NR; CNN; Kanalestimering; 5G NR;

    Sammanfattning : Channel estimation is the process of understanding and analyzing the wireless communication channel's properties. It helps optimize data transmission by providing essential information for adjusting encoding and decoding parameters. LÄS MER

  3. 2. Technologies and Evaluation Metrics for On-Board Over the Air Control

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Aneysha Datta; [2022]
    Nyckelord :Wireless; Performance Metrics; WAVE; DMG; Intra-Vehicular Communication; BER; Simulink; Model-Based Design;

    Sammanfattning : This project has been carried out at the Electronic Embedded Systems Architecture Department at Volvo Construction Equipment (VCE), Eskilstuna, Sweden. It forms the baseline for a stepwise systematic research initiative to convert wired technologies used for certain in-vehicle control and communication components to wireless technologies. LÄS MER

  4. 3. Synchronization of Distributed Units without Access to GPS

    Master-uppsats, Linköpings universitet/Datorteknik

    Författare :Erik Carlsson; [2018]
    Nyckelord :Timing algorithm; Communications system; QPSK; FPGA; VHDL;

    Sammanfattning : Time synchronization between systems having no external reference can be an issue in small wireless node-based systems. In this thesis a transceiver is designed and implemented in two separate systems. Then the timing algorithm of "TwoWay Time Transfer" is then chosen to correct any timing error between the two free running clocks of the systems. LÄS MER

  5. 4. Wireless system design : NB-IoT downlink simulator

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och System

    Författare :Piotr Krasowski; Douglas Troha; [2017]
    Nyckelord :nb-iot; lte; lte-a; downlink; simulator; wireless;

    Sammanfattning : The newly defined NB-IoT standard currently lacks a toolkit and simulator. In order to develop algorithms for this new standard there is a need for channels and signals as reference during tests. MATLAB is commonly used for testing LTE signals and therefore the toolkit was developed in this environment. LÄS MER

  7. 5. Characterization of NI-USRP System

    Master-uppsats, Högskolan i Gävle/Avdelningen för elektronik, matematik och naturvetenskap

    Författare :Xubo Fu; [2014]
    Nyckelord :NI-USRP; Labview; Characterization; SNR; digital modulation; PSK;

    Sammanfattning : Nowadays the rapid developments of wireless communication technologies there are more and more ways to look into the RF measurements and designs in detail such as Universal Software Radio Peripheral(USRP) from LabVIEW, Advance Design System(ADS),etc.Moreover a lack of measurements what compared with different digital modulation schemes is becoming a problem. LÄS MER