Search for dissertations about: "SPECTRAL ESTIMATORS"

Showing result 11 - 15 of 21 swedish dissertations containing the words SPECTRAL ESTIMATORS.

  2. 11. Type Ia Supernovae : Homogeneity and Diversity

    Author : Gabriele Garavini; Ariel Goobar; David Branch; Stockholms universitet; []
    Keywords : Physics;

    Abstract : The use of type Ia supernovae as distance estimators has shown that about 75% of the energy content of the universe has a negative equation of state parameter and thus, drives the acceleration of the universe. Constraining the exact nature of this energy is one of the main goals in cosmology. READ MORE

  4. 12. Computer-intensive methods for dependent observations

    Author : Anders Nordgaard; Rainer Dahlhaus; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This dissertation deals with computer-intensive methods for dependent observations. The main part is built up by four papers defining and analyzing a resampling method of bootstrap type for the spectral domain of a stationary Gaussian sequence. The emphasis is on practical aspects as well as on asymptotic validity. READ MORE

  5. 13. Perception, Analysis and Synthesis of Speaker Age

    Author : Susanne Schötz; Fonetik; []
    Keywords : HUMANIORA; HUMANITIES; phonology; perceptual cues; speaker age; automatic speaker recognition; acoustic analysis; acoustic correlates; data-driven; Phonetics; formant synthesis; Fonetik; fonologi; Technological sciences; Teknik;

    Abstract : Speaker age is an important paralinguistic feature in speech which has to be considered in the study of phonetic variation. Knowledge about this feature may be used to improve speech technology applications, e.g. automatic speech recognition and speech synthesis. READ MORE

  6. 14. Analysis of regional seismic data by means of higher-order spectra

    Author : Leif Persson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Geofysik med inriktning mot seismologi; Geophysics with specialization in Seismology;

    Abstract : The use of higher-order statistical and spectral estimators as complementary analysis for conventional regional seismic data processing is studied. The issues addressed are; the properties of the complex bispectrum of regional seismic phases, the experimental detection performance of higher-order statistical detectors, discrimination between local earthquakes and explosions, statistical tests and bicoherence, biphase and spatial bispectrum analysis of regional P-, S, and Lg-phases. READ MORE

  7. 15. Contributions to Frequency Offset and Time Delay Estimation

    Author : Mattias Olsson; Håkan Johansson; Jonny Holmberg; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; time delay estimation; OFDM; carrier frequency offset; Signal processing; Signalbehandling;

    Abstract : The demand for reliable high rate and efficient communication is ever increasing. In this thesis we look at two different problems in such systems, and their possible solutions. READ MORE