Sökning: "Over-the-Air"
Visar resultat 16 - 20 av 29 avhandlingar innehållade ordet Over-the-Air.
16. Antenna Designs Aiming at the Next Generation of Wireless Communication
Sammanfattning : Millimeter-wave (mm-wave) frequencies have drawn large attention, specically for the fifth generation (5G) of wireless communication, due to their capability to provide high data-rates. However, design and characterization of the antenna system in wireless communication will face new challenges when we move up to higher frequency bands. LÄS MER
17. Fluid Dynamics of Fluidized Bed Reactors: Experiments and Simulations with System Interactions
Sammanfattning : This thesis is a study of the interaction between the fluidized-bed dynamics and the pressure and flow pulsations from the air-supply system. The interaction has been identified as a key process to understand in order to correctly formulate inlet boundary conditions in numerical modelling of fluidized beds, operated under industrial conditions. LÄS MER
18. Algorithms and Proofs of Concept for Massive MIMO Systems
Sammanfattning : This thesis focuses on algorithms and proofs of concepts in the area of wireless systems operating with a large number of antennas, especially at the base station side.The first studied topic concerns the design and implementation of massive multiple-input multiple-output (MIMO) testbeds, primarily for communications. LÄS MER
19. Modeling Approaches for Active Antenna Transmitters
Sammanfattning : The rapid growth of data traffic in mobile communications has attracted interest to Multiple-Input-Multiple-Output (MIMO) communication systems at millimeter-wave (mmWave) frequencies. MIMO systems exploit active antenna arrays transmitter configurations to obtain higher energy efficiency and beamforming flexibility. LÄS MER
20. Characterization of MIMO Antennas and Terminals: Measurements in Reverberation Chambers
Sammanfattning : The reverberation chamber (RC) has drawn attention as a multipath emulator over the past decade for both passive and active over-the-air (OTA) tests. The overview of this thesis is given in Chapter 1. LÄS MER