Sökning: "Chirp signal"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden Chirp signal.

  1. 1. Optimal Multitaper Spectrograms

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Markus Ydreskog; [2023]
    Nyckelord :Time-frequency analysis; Multitaper spectrogram; Optimization; Wigner distribution; Mathematics and Statistics;

    Sammanfattning : Multitaper spectrograms have been proposed as a method of improving the spectrogram as a time-frequency representation (TFR). This thesis aimed to investigate both previously used and new methods for combining multitaper spectrograms of a Gaussian signal and a chirp. LÄS MER

  3. 2. Evaluating the quality of ultrasonic signals using machine learning : A comparative study on binary classification methods applied on ultrasonic chirp signals

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Fabian Revilla; [2023]
    Nyckelord :mechatronics; machine learning; ultrasonic; bolt-tightening; nutrunner; clamp force control; elongation control; pre-load control; cross-correlation; mekatronik; maskininlärning; ultraljud; skruvdragare; klämkraft; klämkraftsåtdragning; klämkraftsreglering; korskorrelation;

    Sammanfattning : Advanced bolt-tightening tools such as automatic nutrunners are commonly used in industrial factories to streamline the assembly process. In safety-critical systems, it is crucialto control the tightening process. LÄS MER

  4. 3. On the statistics and practical application of the reassignment method for Gabor spectrograms

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Erik. M Månsson; [2019]
    Nyckelord :Mathematics and Statistics;

    Sammanfattning : The reassignment method is a technique for improving the concentration of signals in spectrograms and other time-frequency representations (TFR). It achieves this by displacing the points in a TFR according to the reassignment vector for every point. LÄS MER

  5. 4. Micro-Shivering Detection : Detection of human micro-shivering using a 77 GHz radar

    Magister-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Elyas Razzaghi; Arno Van Hoek; [2019]
    Nyckelord :micro-shivering; vibration; vital signs; mmwave radar; fmcw radar; chirp signal; snr; phase accuracy;

    Sammanfattning : Radars have been under steady development to track, identify, image, and classify targets. Modern radar systems, with the help of embedded systems, have additional comprehensive signal processing capabilities. They can extract useful information from very noisy data, e.g. LÄS MER

  7. 5. Sensitivity of Various Qubit Detection Methods in Pr:Y2SiO5

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

    Författare :Vassily Kornienko; [2017]
    Nyckelord :Rare-earth ion quantum computing; Pr:Y2SiO5; Physics and Astronomy;

    Sammanfattning : The long coherence times of the 4f hyperfine levels of rare-earth-ions gives the possibility to use these as quantum computation devices. Moreover after being doped into a crystal the strong dipole-dipole interaction can be utilized to entangle them. Much work has been done here in Lund to attain as many of the DiVincenzo criteria as possible. LÄS MER