Browsing Institutt for elektroniske systemer by Author "Ramstad, Tor Audun"
Now showing items 1-20 of 37
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3D Speckle-Tracking: Sub-voxel Techniques and Tracking Accuracy
Bostad, Ingvild Haraldsen (Master thesis, 2006)Speckle tracking is a method that is useful for examining myocardial function. The method allows the cardiologist examine the left ventricular wall function when there are indications of a myocardial infarction. The method ... -
3D visualisering av lekkasje i hjerteklaff
Horne, Øyvind (Master thesis, 2006)For å kunne gjøre en god gradering av en mitralinsuffisiens er det viktig med en nøyaktig presentasjon av tilbakestrømningen i fargedoppler. Presentasjon av data må også gjøres kjapt for å kunne holde følge med hjertets ... -
3D-videokoding med kontekstbasert, adaptiv, binæraritmetisk koding
Falkevik, Espen (Master thesis, 2006)Masteroppgaven har hatt som formål å videreutvikle en tidligere utviklet 3D delbåndskoder for video. Videreutviklingen har medført at den foreslåtte koderen kan benytte seg av høyere ordens statistikk, samt betingete ... -
3D-videokoding med kontekstbasert, adaptiv, binæraritmetisk koding
Falkevik, Espen (Master thesis, 2006)Masteroppgaven har hatt som formål å videreutvikle en tidligere utviklet 3D delbåndskoder for video. Videreutviklingen har medført at den foreslåtte koderen kan benytte seg av høyere ordens statistikk, samt betingete ... -
Adaptive Frequency Hopping with Channel Prediction
Flåm, John Torjus (Master thesis, 2006)The number of radio systems operating in the 2.4 GHz band is rising as a result of increased usage of wireless technologies. Since such devices interfere with one another, satisfactory co-existence becomes important. Several ... -
Adaptive Frequency Hopping with Channel Prediction
Flåm, John Torjus (Master thesis, 2006)The number of radio systems operating in the 2.4 GHz band is rising as a result of increased usage of wireless technologies. Since such devices interfere with one another, satisfactory co-existence becomes important. Several ... -
Automatic Intima-Lumen detection in Cardiovascular Ultrasound.
Edvardsen, Kristin Holm (Master thesis, 2006)The main goal in this thesis has been to develop an algorithm that robustly identifies the Carotid artery wall boundaries throughout a heart cycle in an ultrasound image. An existing automatic vessel detection algorithm ... -
Bildetransmisjon basert på 2D-nedsampling og shannonavbildninger
Solevåg, Lars Petter (Master thesis, 2006)I følge rate-distorsjonsteorien skal de deler av et signalspektra som faller under støynivået ikke overføres. Dersom signalspekteret er monotont avtakende, kan signalet i slike tilfeller lavpassfiltreres og nedsamples. I ... -
Blind Source Separation Using Temporal Correlation, Non-Gaussianity and Conditional Heteroscedasticity
Fouladi, Seyed Hamed; Balasingham, Ilangko; Kansanen, Kimmo; Ramstad, Tor Audun (Journal article; Peer reviewed, 2018)Independent component analysis separates latent sources from a linear mixture by assuming sources are statistically independent. In real world applications, hidden sources are usually non-Gaussian and have dependence among ... -
Coded Excitation in Color Flow Imaging
Holje, Jostein (Master thesis, 2007) -
Cognitive Radio: Interference Management and Resource Allocation
Ellingsæter, Brage Høyland (Master thesis, 2010)In this thesis the performance of different cognitive systems are analyzed in different environments and scenarios. The main scenarios are: one cognitive and one primary user, multiple cognitive users and channels and ... -
Communication Aspects for a Measurement Based UWB in-Body to on-Body Channel
Floor, Pål Anders; Chavez-Santiago, Raul; Kim, Anna N.; Kansanen, Kimmo; Ramstad, Tor Audun; Balasingham, Ilangko (Journal article; Peer reviewed, 2019)A wireless capsule endoscopy (WCE) is a good option for the screening of the digestive system. To better facilitate detection of diseases at an early stage, gastroenterologists seek both higher frame rate and frame resolution ... -
Cosine Modulated Filter Banks Systems in the Presence of Multipath Transmission
Pérez Tejada, Natalia (Master thesis, 2007)Cosine Modulated Filter Banks Systems in the Presende of Multipath Transmission -
Demonstration of Spatial Interweave Cognitive Radio
Sørby, Torbjørn (Master thesis, 2010)In the last few decades the number of wireless communication systems has grown exponentially making the electromagnetic spectrum more and more crowded. One approach to solve the problem is through Cognitive Radio. This ... -
Distributed source coding in sensor networks: A practical implementation
Petersen, Sigmund Seehuus (Master thesis, 2007)In this thesis we take a closer look at wireless sensor networks and source coding. A necessary condition for this work to have any meaning is that the sensors in the network are spatially co-located and that there is ... -
Distribution Based Spectrum Sensing in Cognitive Radio
Christiansen, Jørgen Berle (Master thesis, 2010)Blind spectrum sensing in cognitive radio is being addressed in this thesis. Particular emphasis is put on performance in the low signal to noise range. It is shown how methods relying on traditional sample based estimation ... -
Implementation and Evaluation of an Exact Cone-Beam Reconstruction Algorithm for Flat Detector CT
Steffensen, Jørgen (Master thesis, 2011)In this thesis, the Defrise-Clack (DC) algorithm [4], an exact cone-beam reconstruction algorithm, was implemented in CUDA for the most common geometry used in x-ray C-arm CT systems (flat panel detector geometry). The ... -
In vivo Magnetic Resonance Spectroscopy and Diffusion Weighted Magnetic Resonance Imaging for Non-Invasive Monitoring of Treatment Response of Subcutaneous HT29 Xenografts in Mice
Røe, Kathrine (Master thesis, 2006)This work investigates whether in vivo magnetic resonance spectroscopy (MRS) and diffusion-weighted magnetic resonance imaging (DW-MRI) can be used for non-invasive monitoring of treatment response in an experimental tumor ... -
In-Body to On-Body Ultra WidebandPropagation Model Derived from Measurementsin Living Animals
Floor, Pål Anders; Chavez-Santiago, Raul; Brovoll, Sverre; Aardal, Øyvind; Bergsland, Jacob; Grymyr, Ole-Johannes; Halvorsen, Per Steinar; Palomar, Rafael; Plettemeier, Dirk; Hamran, Svein-Erik; Ramstad, Tor Audun; Balasingham, Ilangko (Journal article; Peer reviewed, 2015)Ultra wideband (UWB) radio technology for wireless implants has gained significant attention. UWB enables the fabrication of faster and smaller transceivers with ultra low power consumption, which may be integrated into ... -
Laveffekts sensorkommunikasjon ved hjelp av multiple transmisjoner og tilbakekopling for bekjempelse av gausse- og impulsstøy
Kawkabishad, Ali (Master thesis, 2008)I denne oppgaven skal en studere hvordan et inkremental transmission system kan bekjempe impulsstøy i tillegg til gausstøy. En strategi kan være at når mottakeren detekterer unormalt store vedier, forsøker den å gi beskjed ...