Sökning: "UWB SAR"

Visar resultat 11 - 15 av 15 uppsatser innehållade orden UWB SAR.

  1. 11. Focusing Moving Targets Using Range Migration Algorithm in Ultra Wideband Low Frequency Synthetic Aperture Radar

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Samiur Rahman; [2010]
    Nyckelord :SAR; UWB; RMA; Stolt interpolation; frequency domain; pulse compression; moving target; focusing; NRS; Doppler shift.;

    Sammanfattning : Ultra wideband (UWB) synthetic aperture radar (SAR) is being used to operate in low frequency for detecting obscured targets beneath the foliage and in the ground from airplanes or satellites. Although it has the obvious military interest, it also possesses civilian applications such as geophysical studies, weather forecasting and so on. LÄS MER

  3. 12. RFI Suppression in Low Frequency UWB SAR Using the RLS Algorithm

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Khan Fazal Ullah; [2010]
    Nyckelord :Aperture; Adaptive Line Enhancement ALE ; Chirp signal; Global BackProjection GBP ; Pulse compression; Radio Frequency Interference RFI ; Synthetic Aperture Radar SAR ; UltraWide Band UWB ;

    Sammanfattning : Synthetic Aperture Radar (SAR) has many applications within ground image sensing and navigation. UltraWide Band(UWB) SAR operating at Ultra High Frequency /Very High Frequency(UHF/VHF) are usually a ffected by the Radio Frequency Interferences(RFI) from civilian communication bands which causes SIR(Signal to Interference Ratio) to go down. LÄS MER

  4. 13. Synthetic Aperture Radar Image Quality Measurements

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Subrata Kumar Das; [2010]
    Nyckelord :Key Words: SAR; UWB SAR; spatial resolution; differential resolution; ISLR; PSLR; sinc function; IRF-SAR.;

    Sammanfattning : Abstract Synthetic Aperture Radar (SAR) is an important tool for remote sensing now a day. SAR image quality measurements play an important role in the development of SAR image digital processing methods. The essential SAR image quality assessments are spatial resolutions, Integrated Sidelobe Ratio (ISLR) and Peak Sidelobe Ratio (PSLR). LÄS MER

  5. 14. Study of the Local Backprojection Algorithm for Image Formation in Ultra Wideband Synthetic Aperture Radar

    Master-uppsats, Blekinge Tekniska Högskola/Avdelningen för telekommunikationssystem

    Författare :Ishtiaque Ahmed; [2008]
    Nyckelord :SAR; LBP; UWB; Subimage; Subaperture; Image formation; Backprojection;

    Sammanfattning : The purpose of this thesis project is to study and evaluate a UWB Synthetic Aperture Radar (SAR) data image formation algorithm, that was previously less familiar and, that has recently got much attention in this field. Certain properties of it made it acquire a status in radar signal processing branch. LÄS MER

  7. 15. A Study of Fast Backprojection Algorithm for UWB SAR and a Comparison between Fast- and Global Backprojection

    Master-uppsats, Blekinge Tekniska Högskola/Avdelningen för signalbehandling

    Författare :Hawa Yves; [2008]
    Nyckelord :Synthetic Aperture Radar; Ultra Wide-band; time-domain algorithms; Global Backprojection; Fast Backprojection; SAR image processing; interpolation techniques.;

    Sammanfattning : In this thesis, we present a study of the Fast Backprojection (FBP) known to be a fast time-domain algorithm for image retrieval in Synthetic Aperture Radar (SAR). As a time domain algorithm, FBP possesses inherent advantages such as perfect motion compensation, unlimited scene size, wide bandwidth and ability to handle long integration angles. LÄS MER