Sökning: "sinc"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet sinc.

  1. 1. Development of an embedded system platform for signal analysis and processing

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och system

    Författare :Philip Lind; [2023]
    Nyckelord :Digital signal processing; DSP; digital filter; FIR; IIR; Butterworth; Chebychev; windowed sinc; Digital signalbehandling; DSP; digitalt filter; FIR; IIR; Butterworth; Chebychev; sinc; fönstermetoder;

    Sammanfattning : Information is often stored and transmitted through electrical signals. This information may need refinement, which may be done by processing and altering the electrical signals, in which it is transmitted. When refining a signal, a frequency selective filter is often used. It can be implemented through digital signal processing (DSP). LÄS MER

  3. 2. Micromagnetic simulations for the investigation of magnetic vortex array dynamics

    L2-uppsats, Uppsala universitet/Materialfysik

    Författare :Agne Ciuciulkaite; [2016]
    Nyckelord :micromagnetic simulations; ferromagnetic resonance; magnetic vortex; permalloy circular islands;

    Sammanfattning : In this work the dynamics of permalloy circular magnetic islands of 225 nm radius and 10 nm thickness arranged into square lattices was investigated employing micromagnetic simulations.The simulations of the vortex magnetization loops and the ferromagnetic resonance (FMR) spectra were carried out using a free micromagnetics simulation software Mumax3. LÄS MER

  4. 3. Indirect detection of myelin water by T2-relaxation during the RF pulse

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen; Lunds universitet/Medicinsk strålningsfysik, Lund

    Författare :Yosef Al-Abasse; [2015]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Introduction: The axonal myelin sheath is the main cause of magnetic resonance imaging (MRI) contrast between gray matter (GM) and white matter (WM) in the brain. It encloses a small pool of myelin water (MW) with a short T2 of about 15 ms. LÄS MER

  5. 4. 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

  7. 5. Implementation of a Software-Defined Radio Transceiver on High-Speed Digitizer/Generator SDR14

    Master-uppsats, Elektroniksystem; Tekniska högskolan

    Författare :Daniel Björklund; [2012]
    Nyckelord :transceiver; complex mixer; software defined radio; SDR; up-conversion; down-conversion; DUC; DDC; high-rate; high-speed; inverse-sinc; reconstruction; FPGA; SP Devices;

    Sammanfattning : This thesis describes the specification, design and implementation of a software-defined radio system on a two-channel 14-bit digitizer/generator. The multi-stage interpolations and decimations which are required to operate two analog-to-digital converters at 800 megasamples per second (MSps) and two digital-to-analog converters at 1600 MSps from a 25 MSps software-side interface, were designed and implemented. LÄS MER