Sökning: "mmWave"

Visar resultat 6 - 10 av 30 avhandlingar innehållade ordet mmWave.

1. 6. 5G Backhauling with Software-defined Wireless Mesh Networks

   Författare :Ricardo Santos; Andreas Kassler; Rui L. Agar; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SDN; wireless backhaul; heterogeneous networks; mmWave; 5G; resiliency; Computer Science; Datavetenskap;

   Sammanfattning : Current technological advances have caused an exponential growth of the number of mobile Internet-connected devices, along with their respective traffic demands. To cope with this increase of traffic demands, fifth generation (5G) network architectures will need to provide multi-gigabit capacity at the access base stations (BSs), through the deployment of ultra-dense small cells (SCs) operating with millimeter-wave (mmWave) frequencies, e. LÄS MER

3. 7. Polymer-Based Micromachining for Scalable and Cost-Effective Fabrication of Gap Waveguide Devices Beyond 100 GHz

   Författare :Sadia Farjana; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dry film photoresist; Terahertz frequency; Injection molding; MEMS; mmWave; Gap waveguide; Antenna; Waveguide; Polymer microfabrication;

   Sammanfattning : The terahertz (THz) frequency bands have gained attention over the past few years due to the growing number of applications in fields like communication, healthcare, imaging, and spectroscopy. Above 100 GHz transmission line losses become dominating, and waveguides are typically used for transmission. LÄS MER

4. 8. Towards Resilient and Reconfigurable Software-defined Wireless Backhaul Networks

   Författare :Ricardo Santos; Andreas Kassler; José Soler; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 5G; heterogeneous networks; mmWave; resiliency; SDN; wireless backhaul; Computer Science; Datavetenskap;

   Sammanfattning : The increase of mobile devices and services over the last decade has led to unprecedented mobile traffic growth. To cope with the increasing demands, fifth generation (5G) network architectures have been designed to provide the required capacity using a large number of small cells (SCs). LÄS MER

5. 9. Mobile Antenna Systems for 4G and 5G Applications with User Body Interaction

   Författare :Kun Zhao; Sailing He; Cyril Luxey; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Antenna; MIMO; mmWave; Mobile communication; SAR; Power density; User body effect; Channel modeling; Multiplex efficiency; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : In the thesis, the user body effect on antennas in a mobile terminal is discussed. In order to overcome the degradation of Multiple-Input Multiple-Output (MIMO) performance due to the user body effect, a quad-elements MIMO antenna array which can mitigate the body effect through an adaptive antenna switching method is introduced for 4G mobile terminals. LÄS MER

7. 10. Hardware Distortion-Aware Beamforming for MIMO Systems

   Författare :Yasaman Khorsandmanesh; Emil Björnson; Joakim Jaldén; Bo Göransson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantization-aware precoding; limited fronthaul capacity; sum rate maximization; millimeter wave mmWave ; beam coherence time; user equipment UE mobility.; Kvantiseringsmedveten förkodning; begränsad fronthaulkapacitet; summahastighetsmaximering; millimetervåg mmWave ; strålkoherens tid; användarutrustning UE mobilitet.; Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : In the upcoming era of communication systems, there is an anticipated shift towards using lower-grade hardware components to optimize size, cost, and power consumption. This shift is particularly beneficial for multiple-input multiple-output (MIMO) systems and internet-of-things devices, which require numerous components and extended battery lifes. LÄS MER