Sökning: "time-frequency analysis"

Visar resultat 21 - 25 av 43 avhandlingar innehållade orden time-frequency analysis.

1. 21. Analysis of Cellular and Cell-Free Massive MIMO with Rician Fading

   Författare :Özgecan Özdogan; Emil Björnson; Erik G. Larsson; Sofie Pollin; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The data traffic in cellular networks has grown at an exponential pace for decades. This trend will most probably continue in the future, driven by new innovative applications. One of the key enablers of future cellular networks is the massive MIMO technology. A massive MIMO base station is equipped with a massive number (e. LÄS MER

3. 22. Nonlinear phonocardiographic Signal Processing

   Författare :Christer Ahlström; Per Ask; Anders Johansson; Peter Hult; Pablo Laguna; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal analysis methods; computerized cardiac auscultation system; phonocardiographic PCG signal; mitral insufficiency MI ; time- and cost-saving; Medical engineering; Medicinsk teknik;

   Sammanfattning : The aim of this thesis work has been to develop signal analysis methods for a computerized cardiac auscultation system, the intelligent stethoscope. In particular, the work focuses on classification and interpretation of features derived from the phonocardiographic (PCG) signal by using advanced signal processing techniques. LÄS MER

4. 23. Analysis of the time and humidity-dependent mechanical behaviour of paper webs at offset printing preess conditions

   Författare :Jan Lif; KTH; []
   Nyckelord :creep; deformation; dynamic test; ;

   Sammanfattning : This thesis deals with the time, frequency andhumidity-dependent mechanical behaviour of paper webs at offsetprinting press conditions. How the paper web, the set-up andrunning conditions alter press performance is not fullyunderstood, and are difficult to isolate and investigateexperimentally. LÄS MER

5. 24. Investigations of human cortical processing of gentle touch. A study with time-resolved electro-magnetic signal analysis

   Författare :Elin Eriksson Hagberg; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Aβ afferent; C-tactile; touch; EEG; MEG; SEEG;

   Sammanfattning : The present work summarizes investigations of the temporal correlates of brain activity elicited by gentle, moving touch on the hairy skin in healthy participants and in epilepsy patients. Light touch to the hairy skin activates two distinct afferent classes: fast conducting, Aβ afferents and slowly conducting C-tactile (CT) afferents. LÄS MER

7. 25. Signal processing approaches on otoacoustic emissions

   Författare :Jun Cheng; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :otoacoustic emissions; signal processing; time-frequency representation; cochlea; outer hair cell; neonatal hearing screening; basilar membrane nonlinearity; bounce phenomenon; spectral estimation; interrelations of OAEs;

   Sammanfattning : The recent achievement on the measurement of otoacoustic emissions (OAEs) is based on a novel technical development of digital signal processing. OAEs measured in the external ear canal are normal by-products of the active process in hearing, which was discovered by Kemp (1978). LÄS MER