Sökning: "sidelobe"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet sidelobe.

  1. 1. Slotted Waveguide Array Synthesis in Gap Waveguide Technology

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

    Författare :Alvaro Morso Granero; [2021]
    Nyckelord :;

    Sammanfattning : The automotive industry is evolving with the advent and development of autonomous cars. For the operation of these vehicles, sensors are needed, and utilising radar technology is a good solution. LÄS MER

  3. 2. Image Reconstruction Techniques using Kaiser Window in 2D CT Imaging

    Master-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Författare :Md Monowarul Islam; Muftadi Ullah Arpon; [2020]
    Nyckelord :CT Imaging; Parallel-Beam Projection; 2D FFT; Radon Transform; Filters; Window Functions; Kaiser window; Inverse Fourier Transform; FBP.;

    Sammanfattning : The traditional Computed Tomography (CT) is based on the Radon Transform and its inversion. The Radon transform uses parallel beam geometry and its inversion is based on the Fourier slice theorem. LÄS MER

  4. 3. Utvärderingsprogram för radomer

    Kandidat-uppsats, Linköpings universitet/Institutionen för datavetenskap

    Författare :Olov Eklund; [2019]
    Nyckelord :;

    Sammanfattning : Under 1930-talet utvecklades RADAR (Radio Detection and Ranging) av många länder samtidigt och oberoende av varandra. Radarn utvecklades för att kunna upptäcka fientliga objekt, till exempel flygplan. Ett problem var att radarantennen utsätts för väder, vind och andra miljörelaterade påfrestningar. LÄS MER

  5. 4. Cell Acquisition and Synchronization for Unlicensed NB-IoT

    Master-uppsats, Linköpings universitet/Kommunikationssystem

    Författare :Eskil Jörgensen; [2017]
    Nyckelord :Narrowband Internet-of-Things; NB-IoT; unlicensed; cell search; cell acquisition; synchronization; artificial fast fading; binary sequences; peak sidelobe level;

    Sammanfattning : Narrowband Internet-of-Things (NB-IoT) is a new wireless technology designed to support cellular networks with wide coverage for a massive number of very cheap low power user devices. Studies have been initiated for deployment of NB-IoT in unlicensed frequency bands, some of which demand the use of a frequency-hopping scheme with a short channel dwell time. LÄS MER

  7. 5. Evaluation of weighting functions for Sidelobe control in UWB SAR image processing

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Habiba Akhter; [2013]
    Nyckelord :Image processing; Synthetic aperture radar SAR ; Ultra Wideband UWB ; Apodization; Impulse Response IPR Function;

    Sammanfattning : Ultra wideband (UWB) Synthetic Aperture Radar (SAR) holds huge possibilities for both terrestrial and celestial object sensing with excellent details which assists in science and technology. SAR systems associated with large antenna beamwidth, large signal bandwidth and low frequency operating in the VHF/UHF region is becoming gradually more popular because of their rising number of application in the areas of ground-penetrating radar (GPR) and foliage penetration radar (FOPEN). LÄS MER