Essays about: "Antennas"

Showing result 11 - 15 of 356 essays containing the word Antennas.

1. 11. Performance Analysis of the Uplink of Multi-antenna Systems Operating in Aging Channels

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

   Author : Prasetyo Putranto; [2023]
   Keywords : Channel aging; Pilot spacing; Rayleigh; Rician; Spectral efficiency; Uncrewed aerial vehicles; Kanalåldring; Pilotavstånd; Rayleigh; Rician; Spectral effektivitet; Obemannade flygfordon;

   Abstract : In wireless communications, employing pilot symbols enables to estimate the state of the wireless channel at the expense of decreasing the number of symbols available for transmitting data. Addressing this trade-off is particularly challenging when the channel changes rapidly over time, since channel estimates become obsolete over short transmission periods. READ MORE

3. 12. Energy Consumption Modelling for 5G Radio Base Stations with Machine Learning

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Daniel Ringwald; Daniel Larsson; [2023]
   Keywords : Machine learning; energy modelling; radio base station; 5G; neural network; gradient boosted trees; Technology and Engineering;

   Abstract : With an ongoing energy crisis in Europe and an ever-evolving political climate where the environmental impacts of industries are regarded as a top priority, the topic of energy efficiency is high on everyone’s agenda. Mathematical optimization of energy consumption requires a model of the problem at hand. READ MORE

4. 13. Integrating Machine Learning into Constraint Programming for Radio Recommendation in Radio Access Networks

   University essay from Umeå universitet/Institutionen för datavetenskap

   Author : José Ruiz Alarcón; [2023]
   Keywords : ;

   Abstract : This thesis introduces an approach for integrating Machine Learning into Constraint Programming for recommender systems. The main idea is to use clustering algorithms to divide the data into groups, which we use to derive objective functions that are used in a constraint solver. READ MORE

5. 14. Wideband Dielectric Resonator Antenna Array for Autonomous Vehicles

   University essay from Högskolan i Halmstad/Akademin för informationsteknologi

   Author : Andreas Johansson; Luke Müller; [2023]
   Keywords : DRA; dielectric resonator antenna; 5G; FR2; 28GHz; NR; antenna; circular polarization; autonomous vehicles;

   Abstract : With the rapid advancement of autonomous vehicles, reliable and efficient wireless communication systems with high data rates have become essential for their safe and efficient operation and further evolution. High data rates are found in the higher frequency bands where conductive antennas lack radiation efficiency. READ MORE

6. 15. Simulation and Testing of a MU-MIMO Beamforming System

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Nazyar Mehdishishavan; Zonghan Wang; [2023]
   Keywords : Multi-User Multiple-Input Multiple-Output MU-MIMO ; Beamforming; Sounding Reference Signal SRS ; Reciprocity-based; Butler matrix; Advanced Antenna System AAS ; Technology and Engineering;

   Abstract : Multi-User Multiple-Input Multiple-Output (MU-MIMO) technology has become increasingly important in the field of wireless communication due to its ability to highly increase the capacity and efficiency of wireless networks [1]. Beamforming, as a technique used in MU-MIMO systems, improves network performance by improving signal quality and reducing interference. READ MORE