Sökning: "Beamforming"

Visar resultat 16 - 20 av 115 uppsatser innehållade ordet Beamforming.

1. 16. A Study Of Using Communication Signals As Sonar Pulses In Underwater Sensor Systems

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och system

   Författare :Erica Svensson; [2022]
   Nyckelord :Sonar; Communication signal; Beamforming; Underwater sensor system; WLS estimator; Detection algorithm; Position estimation;

   Sammanfattning : Underwater communication within underwater sensor network is crucial for surveillance of coast and ocean areas. The aim of this report was to examine whether it is realistic to use the communication signal which is sent from one node to another as a sonar pulse, and in such case at what distances. LÄS MER

3. 17. 3D Printed Modulated Geodesic Lens Antenna With Even Coverage in the Far-Field

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

   Författare :Harald Lindohf; Marcus Wikner; [2022]
   Nyckelord :3D-printed; geodesic; modulated; Luneburg; beamforming; lens antenna;

   Sammanfattning : The development of 5G and 6G entails new demandson antennas. This includes fast and reliable connections to a largenumber of devices. A wider area of coverage, and thus moreantennas are also expected, which is problematic for the expensiveantennas used today. To meet those demands, a geodesic lensantenna has been proposed. LÄS MER

4. 18. Beamformed Channel Matrix Positioning using 5G Testbench CSI data with a Deep-Learning Pipeline

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

   Författare :Andre Ráth; [2022]
   Nyckelord :5G; Deep Learning; Positioning; Channel State Information; CSI; Deep-learning; neural-network; particle-filter; particle; filter; Channel Matrix; Beamformed Channel Matrix; localization; real-world; data-driven; 5G testbench; basestation; Technology and Engineering;

   Sammanfattning : Within the telecommunications industry, a positioning system for estimating user equipment (UE) location using purely information available for the basestation has an enormous number of potential uses. The link between physical position and the network channel state enables potential positioning systems to function by under- standing the network channel state dependency on location, using a model-based, data-based, or a combined approach. LÄS MER

5. 19. Fast Clock Synchronization for Large-Scale MEMS Ultrasonic Transducer Arrays

   Master-uppsats, Linköpings universitet/Institutionen för systemteknik

   Författare :Karl-Johan Karlsson; [2022]
   Nyckelord :clock synchronization; clock deskew; MEMS transducer; Delay line; Time-to-Digital conveter;

   Sammanfattning : In many systems today sensors or transmitters need to be read or controlled simultaneously. This thesis investigates a new architecture used for deskewing clock signals between multiple separated parts of a signal transmission system. LÄS MER

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

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

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

   Sammanfattning : 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). LÄS MER