Essays about: "Wave propagation models"

Showing result 1 - 5 of 26 essays containing the words Wave propagation models.

  1. 1. Parabolic equation models simulating LoS MIMO conditions

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Zarafshan Carneil; [2023]
    Keywords : MIMO; channel capacity; phase difference; MIMO phase;

    Abstract : This thesis explores and develops a simulation model for Line of Sight(LoS) Multiple-Input Multiple-Output (MIMO) systems in complex environments. The focus will be on implementing a 2 × 2-MIMO system in order to study phase differences of the received signals. READ MORE

  3. 2. Synthesizing of brain MRE wave data

    University essay from KTH/Medicinsk avbildning

    Author : Maryia Yuliuhina; [2023]
    Keywords : MR elastography; brain MRE; synthetic data; computational modeling; shear wave elastography; MR-elastografi; hjärn MRE; syntetiska data; beräkningsmodellering; skjuvvåg elastografi;

    Abstract : Magnetic resonance elastography (MRE) is an imaging technique that allows for non-invasive access to the physical properties of body tissues. MRE has great potential, but it is difficult to conduct research due to the time-consuming estimation of stiffness maps, which could be speeded up by using neural network. READ MORE

  4. 3. Evaporation Duct Modelling for a Wave-Propagation Simulator

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Oscar Eklund; [2022]
    Keywords : evaporation; duct; height; monin; obukhov; mos; surface; layer; ssft; byc; pj; businger; dyer; beljaars; holtslag; cheng; brutsaert; sheba;

    Abstract : Long-range communication proves to be a challenge due to the Earth’s curvature, since electromagnetic waves propagate away from the Earth’s surface in a free atmosphere. A possible solution to beyond line-of-sight communication is the atmospheric phenomenon known as the evaporation duct. READ MORE

  5. 4. Presence detection by means of RF waveform classification

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Max Lengdell; [2022]
    Keywords : presence detection; machine learning; radio wave classification; unsupervised learning; supervised learning; sensor fusion; unsupervised classification;

    Abstract : This master thesis investigates the possibility to automatically label and classify radio waves for presence detection, where the objective is to obtain information about the number of people in a room based on channel estimates. Labeling data for machine learning is time consuming and tedious process. To address this two approaches are evaluated. READ MORE

  6. 5. An evaluation of coverage models for LoRa

    University essay from Jönköping University/JTH, Avdelningen för datateknik och informatik

    Author : Felix Paulsson; Issa Bitar; [2021]
    Keywords : LoRa; LoRaWAN; IoT; Empirical models; Path loss; Attenuation; Coverage;

    Abstract : LoRaWAN is a wireless network technology based on the LoRa modulation technology. When planning such a network, it is important to estimate the network’s coverage, which can be done by calculating path loss. To do this, one can utilize empirical models of radio wave propagation. READ MORE