Sökning: "radio propagation modelling"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden radio propagation modelling.

1. 1. Antenna Design and Link Performance Verification of Antennas for 5G mmWave Handheld Devices

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

   Författare :Vinodhini Mylai Chandrasekaran; Nikhila Chinnayanapalli Ravi; [2022]
   Nyckelord :Antenna Design; mmWave frequency; 5G; FEKO; Technology and Engineering;

   Sammanfattning : The purpose of the thesis is to design a new antenna system and to verify its link performance in 5G FR2 mmWave frequency for handheld devices to enable cellular communication. The main objective is to design an antenna primarily at 28GHz and 39GHz to enhance spectrum efficiency, along with improved transmission data rates, enabling new cases like Augmented Reality (AR), Virtual Reality (VR) and many more such applications. LÄS MER

3. 2. Radio-wave propagation modelling over rough sea surfaces and inhomogeneous atmosphere

   Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet

   Författare :Månz Nilsson; [2021]
   Nyckelord :;

   Sammanfattning : .... LÄS MER

4. 3. Applying Machine Learning for Generating Radio Channel Coefficients : Practical insights into the process of selectingand implementing machine learning algorithms for spatial channel modelling

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

   Författare :Adrian Zander; [2021]
   Nyckelord :Spatial Channel Model; Deep Generative Networks; Variational Autoencoder; Simulation; Spatial Channel Model; Deep Generative Networks; Variational Autoencoder; Simulation;

   Sammanfattning : One cornerstone in building future 5G and beyond wireless systems is to mimic the real-world environment using a simulator. The simulator needs to reflect the experienced propagation environment by the device in different scenarios. LÄS MER

5. 4. Propagation of Radio Waves in a Realistic Environment using a Parabolic Equation Approach

   Master-uppsats, Linköpings universitet/Teoretisk Fysik

   Författare :Jonas Ehn; [2019]
   Nyckelord :Electromagnetic fields; wave propagation; radar; parabolic equation; split-step Fourier method;

   Sammanfattning : Radars are used for range estimation of distant objects. They operate on the principle of sending electromagnetic pulses that are reflected off a target. This leads to the propagation of electromagnetic waves over large distances. As the waves propagate, they are affected by several aspects that decrease the performance of the radar system. LÄS MER

7. 5. 5G Positioning using Machine Learning

   Master-uppsats, Linköpings universitet/Reglerteknik

   Författare :Magnus Malmström; [2018]
   Nyckelord :5G; Positioning; Non Line of Sight NLOS ; Urban Canyons; Machine Learning; Neural Networks; Random Forest; Detection; Neyman-Person; Generalized Likelihood Ratio Test; Kalam Filter;

   Sammanfattning : Positioning is recognized as an important feature of fifth generation (\abbrFiveG) cellular networks due to the massive number of commercial use cases that would benefit from access to position information. Radio based positioning has always been a challenging task in urban canyons where buildings block and reflect the radio signal, causing multipath propagation and non-line-of-sight (NLOS) signal conditions. LÄS MER