Sökning: "Multiple Input Multiple Output"

Visar resultat 1 - 5 av 146 uppsatser innehållade orden Multiple Input Multiple Output.

  1. 1. Multi-modal Neural Representations for Semantic Code Search

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

    Författare :Jian Gu; [2020]
    Nyckelord :multi-modal learning; pseudo-siamese architecture; neural bagof- words model; tree representation; Simplified Semantic Tree; semantic code search; multimodal inlärning; pseudo-siamesisk arkitektur; neural väskamed- ord-modell; trädrepresentation; förenklat semantiskt träd; semantisk kodsökning;

    Sammanfattning : In recent decades, various software systems have gradually become the basis of our society. Programmers search existing code snippets from time to time in their daily life. LÄS MER

  2. 2. 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. 3. Automatic Differential Diagnosis Model of Patients with Parkinsonian Syndrome : A model using multiple linear regression and classification tree learning

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik; Uppsala universitet/Tillämpad kärnfysik

    Författare :Rakel Löwe; Ida Schneider; [2020]
    Nyckelord :PET; Parkinsonism; Parkinsonian syndrome; multilinear regression; classification tree;

    Sammanfattning : Parkinsonian syndrome is an umbrella term including several diseases with similar symptoms. PET images are key when differential diagnosing patients with parkinsonsian syndrome. In this work two automatic diagnosing models are developed and evaluated, with PET images as input, and a diagnosis as output. LÄS MER

  4. 4. Machine Learning Uplink Power Control in Single Input Multiple Output Cell-free Networks

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

    Författare :Yiyang Tai; [2020]
    Nyckelord :Neural networks; Power allocation; Matched-filter reception; Max-min; Max-product; Geometric programming; Neurala nätverk; Strömallokering; Matchad filtermottagning; Max-min; Max-produkt; Geometrisk programmering;

    Sammanfattning : This thesis considers the uplink of cell-free single input multiple output systems, in which the access points employ matched-filter reception. In this setting, our objectiveis to develop a scalable uplink power control scheme that relies only on large-scale channel gain estimates and is robust to changes in the environment. LÄS MER

  5. 5. Lean Beam Management for New Radio

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

    Författare :Nawanit Kumar; [2020]
    Nyckelord :5G; NR; MIMO; Beam management; CSI-RS; Technology and Engineering;

    Sammanfattning : The use of millimetre-wave frequencies in Fifth generation New Radio has lead to high path loss due to radio propagation environment. Simultaneously, high data rates is a must for current products due to high market demand. This requirement accounts for efficient tracking of the best beam for the user equipment to stay connected to it. LÄS MER