Sökning: "short-time Fourier transform"

Visar resultat 11 - 15 av 19 uppsatser innehållade orden short-time Fourier transform.

  1. 11. Optimality of uncertaintyprinciples for joint timefrequencyrepresentations

    Magister-uppsats, Linnéuniversitetet/Institutionen för matematik (MA)

    Författare :Leonie Callies; [2014]
    Nyckelord :;

    Sammanfattning : The study of joint time-frequency representations is a large field of mathematics and physics, especially signal analysis. Based on Heisenberg's cllassical uncertainty principle various inequalities for such time-frequency distributions have been studied. LÄS MER

  3. 12. Measurement of horses gaits using geo-sensors

    Master-uppsats, Högskolan i Gävle/Avdelningen för elektronik, matematik och naturvetenskap

    Författare :Xuefei Qin; [2014]
    Nyckelord :Horse’s gaits; Acceleration; Measurement; Sensors; Short Time Fourier Transform; Window functions; Least Squares; Classification.;

    Sammanfattning : The aim of this thesis is to determine the horse’s gait types using the acceleration values measured from the horse. A measurement was taken in Gävletravet, a total of five Nanotrak sensors were used, four on the different parts of the horse, and one on the hand of the horse’s driver, a car was driven parallel to the horse and the motions of the horse was recorded by a camera in order to synchronize with the data measured by the sensors, a total of four videos were recorded. LÄS MER

  4. 13. Combining Beamforming and Blind Source Separation to Improve Source Separation Performance

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Written: Aishwarya Sivaramakrishnan; Ruben Johnson Robert Jeremiah; [2013]
    Nyckelord :Blind Source Separation; Beamforming; Combining Technique; ICA; Frequency Domain BSS;

    Sammanfattning : Beamforming (BF) and Blind Source Separation (BSS) are always two interesting methodologies to witness in order to separate two sources. BSS in frequency domain have been facing a serious issue of permutation ambiguity while performing source separation using Independent Component Analysis (ICA). LÄS MER

  5. 14. On the Short-Time Fourier Transform and Gabor Frames generated by B-splines

    Kandidat-uppsats, Institutionen för datavetenskap, fysik och matematik, DFM

    Författare :Henrik Fredriksson; [2012]
    Nyckelord :short-time Fourier transform; time-frequency analysis; Gabor frames; B-splines;

    Sammanfattning : In this thesis we study the short-time Fourier transform. The short-time Fourier transform of a function f(x) is obtained by restricting our function to a short time segment and take the Fourier transform of this restriction. This method gives information locally of f in both time and frequency simultaneously. LÄS MER

  7. 15. Methods for Recovery of Missing Speech Packets

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Muhammad Azam; [2011]
    Nyckelord :Slow varying parameters; Short time energy STE ; Zero crossing ZC measure; Modified STE methods; FFT block code method; STZR; STZL; Consecutive speech packets.;

    Sammanfattning : In packetized voice communication, speech packets are sometimes lost due to data transmission problems, e.g., signal fading, or interfering users and noise. For the recovery of missing speech packets, different methods are proposed. LÄS MER