Essays about: "fädning"

Found 5 essays containing the word fädning.

  1. 1. Channel Estimation and Power Control Algorithms in the Presence of Channel Aging

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

    Author : Yan Bixing; [2023]
    Keywords : Fading channel; auto-regressive model; power allocation; uncrewed aerial vehicle networks; Fading kanal; auto-regressiv modell; krafttilldelning; obemannade flygfordonsnätverk;

    Abstract : Power allocation algorithms that determine how much power should be allocated to pilot and data symbols play an important role in addressing the trade-off between accurate channel estimation and high high spectral efficiency for data symbols in the presence of time-varying fading channels. Dealing with this trade-off is highly non-trivial when the channel changes or ages rapidly in time. READ MORE

  3. 2. Evaluation of Peer-to-Peer LoRa for Geolocation Usage in a Rural Environment

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

    Author : Elias Chahine; William Lewin; [2019]
    Keywords : LoRa; Peer-to-Peer; Global Positioning System; Rural; Internet of Things; LoRa; Peer-to-Peer; Platsinformation; Landsbygd; Sakernas internet;

    Abstract : With the increased popularity of the Internet of Things (IoT) and vehicle tracking, long range communication alternatives become essential for connecting a large number of units in a network.In areas where no coverage from existing technologies is available such as rural areas, the need for a solution presents itself. READ MORE

  4. 3. Performance Evaluation Of Self-Backhaul For Small-Cell 5G Solutions

    University essay from Uppsala universitet/Signaler och System

    Author : Martin Hellkvist; [2018]
    Keywords : Telekommunikation; 5G; engelska; Tele communications; 5G; 4G; 3G; fading; fädning; fasbrus; phase noise; noise; brus; interferens; kanalmodellering; channel modeling;

    Abstract : This thesis evaluates the possibility of using millimeter waves of frequency 28GHz for the use of wireless backhaul in small cell solutions in the coming fifth generation mobile networks. This frequency band has not been used in preceding mobile networks but is undergoing a lot of research. READ MORE

  5. 4. Cell Acquisition and Synchronization for Unlicensed NB-IoT

    University essay from Linköpings universitet/Kommunikationssystem

    Author : Eskil Jörgensen; [2017]
    Keywords : Narrowband Internet-of-Things; NB-IoT; unlicensed; cell search; cell acquisition; synchronization; artificial fast fading; binary sequences; peak sidelobe level;

    Abstract : Narrowband Internet-of-Things (NB-IoT) is a new wireless technology designed to support cellular networks with wide coverage for a massive number of very cheap low power user devices. Studies have been initiated for deployment of NB-IoT in unlicensed frequency bands, some of which demand the use of a frequency-hopping scheme with a short channel dwell time. READ MORE

  6. 5. Low-PAR Precoding for Very-Large Multi-User MIMO Systems

    University essay from Linköpings universitet/Kommunikationssystem; Linköpings universitet/Tekniska högskolan

    Author : Christopher Mollén; [2013]
    Keywords : MIMO; PAR Reduction; Precoding; Multi-User; MIMO; toppvärdesreducering; förkodning; fleranvändarförkodning;

    Abstract : Storskaliga fleranvändar-MIMO-system, med hundratals basstationsantenner, studeras med allt större intresse både inom akademin och industrin. En anledning är att sådana system kan betjäna flera enantennsanvändare samtidigt över samma tids-frekvens-resurs med fleranvändarförkodning. READ MORE