Essays about: "Millimetervågor"

Showing result 1 - 5 of 13 essays containing the word Millimetervågor.

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

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

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

    Abstract : 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. READ MORE

  2. 2. Simulation of Radio Propagation Path in Indoor Environment

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Minu Revathikumar; [2022]
    Keywords : Indoor 3D propagation model; millimeter waves mmWaves ; 5G; Basic propagation mechanism; Excess loss; Inomhus 3Dspridnings modell; millimeter vågor mmVågor ; 5G; Grundläggande spridnings mekanism; Överskotts förlust;

    Abstract : Several propagation channel models are designed to verify signal behavior in specific environments for future 5G cellular networks. Hence, with the massive development and demand of indoor wireless systems, a suitable design prior to deployment is required for energy and cost-efficient implementations. READ MORE

  3. 3. Initial access in 5G mmWave networks with different base station parameters

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Xiao Yang; [2022]
    Keywords : Initial Access; Millimeter-Wave Network; Cell Search; Random Search; Genetic Algorithm; Machine Learning; Första åtkomst; Millimetervågsnätverk; Cell sökning; Slumpmässig sökning; Genetisk algoritm; Maskininlärning;

    Abstract : Nowadays in the fifth generation (5G) communication systems, millimeter wave (mmWave) has aroused interest to not only industrial use but also network operators due to the massive amount of bandwidth available at mmWave frequencies. Initial access in cellular systems is an essential procedure in which new mobile user equipment (UE) establishes a connection with a base station (BS). READ MORE

  4. 4. Measurement of the Complex Permittivity of Phantoms for 5G/6G Compliance Tests

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : William Utriainen; Adel Alizadeh; [2021]
    Keywords : 5G; radiation; absorption; safety;

    Abstract : In late 2019, 5G, the next generation of networktechnology was first deployed. The first deployment covers onlya small part of the total data transfer needs. In order to increasedata transfer, the frequency band used, must be increasedtowards the millimeter wave.As the frequency band is increased, safety studies must be done. READ MORE

  5. 5. An Exploratory Study of Simple Fall and Activity Recognition Using mmWave

    University essay from Blekinge Tekniska Högskola/Institutionen för datavetenskap

    Author : Tim Johansson; Leo Wikström; [2021]
    Keywords : mmWave; radar; fmcw; smart home;

    Abstract : Background. As smart appliances become more attractive, the demand from public consumers grows, and producers are in search of innovative technologies that may aid in the creation of smart homes. Current products may use screens and buttons, voice commands and motion detection to create an interactive experience for consumers. READ MORE