Essays about: "Radio-waves"

Showing result 21 - 25 of 51 essays containing the word Radio-waves.

  1. 21. Using Very-Low-Frequency Electromagnetics (VLF-EM) for geophysical exploration at Albertine Graben, Uganda : a new CAD approach for 3D data blending

    University essay from Lunds universitet/Geologiska institutionen

    Author : David Eggert; [2019]
    Keywords : Albertine Graben; EAR; East-African-Rift; Exploration; Geology; Geophysics; Ore; Uganda; Very Low Frequency; VLF-EM; Earth and Environmental Sciences;

    Abstract : Elektromagnetiska vågor, även kända som radiovågor, är vågor som sprider sig med låga frekvenser från 3 till 30 kHz. Dessa lågfrekventa vågor används vanligtvis när man önskar kommunicera med ubåtar. De kan emellertid också användas på land för att mäta skillnader i jord– och bergarters elektriska konduktivitet. READ MORE

  3. 22. Propagation of Radio Waves in a Realistic Environment using a Parabolic Equation Approach

    University essay from Linköpings universitet/Teoretisk Fysik

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

    Abstract : 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. READ MORE

  4. 23. Efficient search of an underwater area based on probability

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Hampus Pukitis Furhoff; [2019]
    Keywords : Bayesian search theory; AUV; Heuristics; Quadtree; NP-hard; Dead reckoning; Bayesisk sökteori; AUV; Heuristik; Quadtree; NP-hart; Död räkning;

    Abstract : Today more and more different types of autonomous robots and vehicles are being developed. Most of these rely on the global positioning system and/or communication with other robots and vehicles to determine their global position. READ MORE

  5. 24. Interactive visualization of radio waves propagation in 5G massive MIMO

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Wojciech Adaszynski; [2019]
    Keywords : Visualization; Interface design; Participatory design; Affective visualization; Massive MIMO; Beamforming;

    Abstract : The complexity of advanced antenna techniques used in the new generation of wireless networks (5G) makes communication between experts and non-technical staff more difficult than ever. As cooperation between network vendors and network operators affects the adoption of the new standard, a need for a new tool has emerged to make technical presentations more engaging and compelling. READ MORE

  6. 25. Coupled waves as a model to describe chaotic turbulence pumped by radio waves in the ionosphere

    University essay from Uppsala universitet/Institutet för rymdfysik, Uppsalaavdelningen; Uppsala universitet/Institutionen för fysik och astronomi

    Author : Axel Hahlin; [2018]
    Keywords : turbulence; coupled waves; plasma;

    Abstract : Experimental results concerning plasma turbulence pumped in theionosphere by powerful radio waves suggest that the turbulence is due todeterministic chaos. To investigate the possibility of deterministic chaosin the ionosphere coupled wave systems have been studied to see chaoticdynamics. READ MORE