Sökning: "sum-rate"

Visar resultat 1 - 5 av 8 uppsatser innehållade ordet sum-rate.

  1. 1. Hierarchical Clustering based Dynamic Subarrays for Hybrid Beamforming Massive MU-MIMO

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

    Författare :Francisco Goncalves Contente; [2020]
    Nyckelord :;

    Sammanfattning : Hybrid Beamforming in multiple input multiple output systems has surged in the past few years as the prime precoding architecture for massive MIMO systems since it addresses the systems performance and complexity/power consumption tradeoff. Most of the literature addresses HBF MIMO with a fixed antenna subarray, however it is possible to further increase the spectral efficiency of the system by dynamically configuring the HBF MIMO subarray according the channel state information of the users. LÄS MER

  3. 2. Investigating the Effect of Antenna Polarization on the Performance of CoMP Systems based on Synchronous Multi-link Measurements

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

    Författare :Sakib- Bin- Redhwan; Ahmad Shekhan; [2016]
    Nyckelord :CoMP; MU-MIMO; Sum-rate Capacity; Beamforming; Technology and Engineering;

    Sammanfattning : In this master thesis work, the effect of polarization, at the Base Station (BS) side, on the performance of multi-user Coordinated Multipoint (CoMP) systems is studied. This study was performed using synchronous multi-link measurements that took place at the campus of the faculty of Engineering, LTH, Lund University, Lund, Sweden, where two different BS setups were studied. LÄS MER

  4. 3. Massive MIMO Channel Modeling

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

    Författare :Yongchun Wang; Xin You; [2015]
    Nyckelord :massive MIMO; 5G; channel modeling; the Kronecker model; the Weichselberger model; capacity; sum-rate; singular value spread; the Random Cluster Model; cluster; spatial correlation; large-scale fading; Technology and Engineering;

    Sammanfattning : Massive MIMO has attracted many researchers’ attention as it is a promising technology for future 5G communication systems. To characterize the propagation channels of the massive MIMO and to evaluate system performance, it is important to develop an accurate channel model for it. In this thesis, two correlative models, i.e. LÄS MER

  5. 4. Full Duplex Multiuser MIMO with Massive Arrays

    Master-uppsats, Institutionen för systemteknik; Tekniska högskolan

    Författare :Hussain Wannas; [2014]
    Nyckelord :Full-Duplex; Massive MIMO; MIMO; MU-MIMO;

    Sammanfattning : Half-Duplex Multiuser Multiple-Input Multiple-Output (HD MU-MIMO) systemscurrently employed in communication systems are not experiencing the selfinterference(SI) problem but they are not optimal in terms of efficiency and interms of resources used (time and frequency resources). Ignoring the effect of largescalefading, we start by explaining the uplink (UL) and downlink (DL) parts ofthe MU-MIMO system and how the sum-rate is calculated. LÄS MER

  7. 5. Coordinated MIMO Precoder EvaluationBased on Measurement in IndoorEnvironment

    Master-uppsats, KTH/Signalbehandling

    Författare :Xiaoqian Zhu; [2013]
    Nyckelord :;

    Sammanfattning : In this thesis, we investigate the performance of the coordinated MIMO precoders, using measured channels in indoorvenvironment. Instead of simulated radio propagationvconditions, measured channels are used to evaluate the precoder performance for real-world channels. LÄS MER