Sökning: "förkodning"

Hittade 5 uppsatser innehållade ordet förkodning.

  1. 1. Block Diagonalization Based Beamforming

    Master-uppsats, KTH/Teknisk informationsvetenskap

    Författare :Darshan Patil; [2017]
    Nyckelord :;

    Sammanfattning : With increasing mobile penetration multi-user multi-antenna wireless communication systems are needed. This is to ensure higher per-user data rates along with higher system capacities by exploiting the excess degree of freedom due to additional antennas at the receiver with spatial multiplexing. LÄS MER

  3. 2. Robust MIMO Precoding on Real-World Measured Channels

    Master-uppsats, KTH/Signalbehandling

    Författare :Filip Hedenskog; [2015]
    Nyckelord :MIMO; maximin; imperfect CSIT; real-world measured channels; uncertainty set; worst-case robustness;

    Sammanfattning : It is well known that multi-input multi-output (MIMO) wireless communication systemsthat employ precoding techniques are capable of meeting the high expectations of modernand future wireless communication standards. In order to fully utilize these techniques, thecommunication system typically requires information of the channel, commonly referred toas channel state information (CSI). LÄS MER

  4. 3. Massive MIMO in LTE with MRT Precoder : Channel Ageing and Throughput Analysis in a Single-Cell Deployment

    Master-uppsats, Linköpings universitet/Kommunikationssystem; Linköpings universitet/Tekniska högskolan

    Författare :Henrik Rydén; [2014]
    Nyckelord :Massive MIMO; Channel Ageing; LTE; MRT;

    Sammanfattning : Mobile data traffic is growing exponentially due to the popularization of smart phones, tablets and other data traffic appliances. One way of handling the increased data traffic is to deploy large antenna arrays at the base station, also known as Massive MIMO. LÄS MER

  5. 4. Low complexity algorithms for faster-than-Nyquistsign : Using coding to avoid an NP-hard problem

    Master-uppsats, KTH/Optimeringslära och systemteori

    Författare :Emil Ringh; [2013]
    Nyckelord :;

    Sammanfattning : This thesis is an investigation of what happens when communication links are pushed towards their limits and the data-bearing-pulses are packed tighter in time than previously done. This is called faster-than-Nyquist (FTN) signaling and it will violate the Nyquist inter-symbol interference criterion, implying that the data-pulsesare no longer orthogonal and thus that the samples at the receiver will be dependent on more than one of the transmitted symbols. LÄS MER

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

    Master-uppsats, Linköpings universitet/Kommunikationssystem; Linköpings universitet/Tekniska högskolan

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

    Sammanfattning : 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. LÄS MER