Essays about: "spatial propagation"

Showing result 26 - 30 of 38 essays containing the words spatial propagation.

  1. 26. Interferometer Design for Attosecond Experiments

    University essay from Lunds universitet/Fysiska institutionen

    Author : Simon Ek; [2015]
    Keywords : FRED; attophysics; atomic physics; stability; simulations; MATLAB; interferometer design; interferometers; error propagation; Physics and Astronomy;

    Abstract : Resolving fast events, such as electron dynamics, requires short light pulses. To this date the shortest available light pulses are created using High-order Harmonic Generation (HHG) and have a duration of a few hundred attoseconds (1 as = $10^{-18}$ s). READ MORE

  3. 27. Performance Analysis of 3-hop using DAF and DF over 2-hop Relaying Protocols

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Faisal Mehmood; Muneeb Ejaz; [2013]
    Keywords : Bit Error Rate; Cognitive Radio; Decode Amplify and Forward; Energy Detection; Probability of Detection; Rayleigh Fading; Relay Network;

    Abstract : In wireless Communication, the need of radio spectrum increases nowadays. But in the system we are losing approximately 82-86% of spectrum most of the time due to the absence of Primary User (PU). To overcome this issue Cognitive Radio (CR) is an admirable approach. READ MORE

  4. 28. On long-range and high frequency propagation alongparallel strip conductors in layered media : A simplified yet accurate method using the mode matching technique in the spectral domain

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Benjamin Oakes; [2013]
    Keywords : ;

    Abstract : Electrical arcing in the railway environment radiates wideband noise that can disturb nearbysensitive electronics e.g. signaling systems. High frequency disturbances follow conducting wiresand rails. READ MORE

  5. 29. Separation of lobes in Multispectral Digital Holography

    University essay from Institutionen för fysik

    Author : Örn Hjartarson; [2013]
    Keywords : Holography Holographic Optics Lobes Electromagnetism Non-invasive;

    Abstract : Through a holographic recording a property from the third dimension, the depth, is obtained in the form of a phase map of the incident light. One wavelength holography will have a unique phase for the depth range corresponding to the wavelength of the light and outside this range the real depth can not be resolved. READ MORE

  6. 30. Building and Evaluating a 3D Scanning System for Measurementsand Estimation of Antennas and Propagation Channels

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Erik Johannes Aagaard Fransson; Tobias Wall-Horgen; [2012]
    Keywords : 3D field scanner; radio propagation channel; virtual array; MIMO; Angle-of-Arrival; regularization; inverse problem; L-curve; truncated singular value decompositions; successive interference cancellation; horn antenna; phase center.;

    Abstract : Wireless communications rely, among other things, on theunderstanding of the properties of the radio propagationchannel, the antennas and their interplay. Adequate measurementsare required to verify theoretical models and togain knowledge of the channel behavior and antenna performance. READ MORE