Sökning: "directional antennas"

Visar resultat 6 - 10 av 21 uppsatser innehållade orden directional antennas.

1. 6. Interference Aware Distributed Network Formation with Reinforcement Learning

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

   Författare :Berkcan Okur; [2021]
   Nyckelord :distributed; network formation; topology formation; reinforcement learning; multi-agent; distribuerad; nätverksbildning; topologibildning; förstärkande inlärning; multiagent;

   Sammanfattning : Ad-hoc networks suffer from dynamicity due to mobility of the nodes or node addition/removal to/from the system. This means, the formed topology may not be connected anymore or better topologies can be found as time passes if the position of the nodes changes or some nodes in the network is broken. LÄS MER

3. 7. Link blockage modelling for channel state prediction in high-frequencies using deep learning

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

   Författare :Shreya Krishnama Chari; [2020]
   Nyckelord :Radio link blockage; mmwave communications; sub-6GHz communications; 5G; Long short-term memory network; Deep neural network; Blockering av radiolänkar; mmwave-kommunikation; sub-6GHzkommunikation; 5G; Long short-term memory nätverk; Deep neural nätverk;

   Sammanfattning : With the accessibility to generous spectrum and development of high gain antenna arrays, wireless communication in higher frequency bands providing multi-gigabit short range wireless access has become a reality. The directional antennas have proven to reduce losses due to interfering signals but are still exposed to blockage events. LÄS MER

4. 8. PLL for 5G mmWave

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

   Författare :Daniel Bakic; Jinzhuo Wu; [2020]
   Nyckelord :PLL; 5G-NR; RFIC; beamforming; 22nm FDSOI; charge pump; vco; loop filter; frequency divider; phase detector; phase noise; jitter; Technology and Engineering;

   Sammanfattning : This paper presents research and implementation of a high frequency Integer-N phase-locked loop for digital beamforming in mobile devices. Multiple topologies investigated whereof two were implemented. The transient phase noise of the PLL is -104dB/-95dB @1MHz. The output frequency range is from 8G-10G. LÄS MER

5. 9. Analysis for frequencies for future 5G system by positioning receiver at different altitudes.

   Master-uppsats, Högskolan i Gävle/Avdelningen för elektroteknik, matematik och naturvetenskap

   Författare :Tanbir Bakth Nabil; [2020]
   Nyckelord :;

   Sammanfattning : One of the main advantages of 5G is the use of high frequency signals and above 6GHz frequency range is one of the most researched topics in the wireless communication industry. Large unused spectrum is expected to be used in the next generation 5G communication. LÄS MER

7. 10. Remote Control of Forest Machinery Using WiFi

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

   Författare :Michal Tomaszuk; [2019]
   Nyckelord :WiFi; IEEE 802.11; propagation in forests; directional antennas; antenna alignment; WiFi; IEEE 802.11; strålning i skog; riktade antenner; antennorientering;

   Sammanfattning : Automation of the forest industry has for over 30 years been an important subject of research, which could reduce the human workload and costs significantly. However, there are still many problems to be solved, such as enabling the communication between the heavy machinery in a forest and a remote base. LÄS MER