Search for dissertations about: "SNR"

Showing result 1 - 5 of 120 swedish dissertations containing the word SNR.

  1. 1. Control and Communication with Signal-to-Noise Ratio Constraints

    University dissertation from Department of Automatic Control, Lund Institute of Technology, Lund University

    Author : Erik Johannesson; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Real-time coding; SNR; Causal coding; AWN channel; AWGN channel; Remote source; Networked control; Control over channel; Convex optimization; Wiener filter;

    Abstract : This thesis is about two problems in the intersection of communication and control theory. Their common feature is that they involve communication over an additive white noise channel with a signal-to-noise ratio (SNR) constraint. The first problem concerns the transmission of a real-valued signal from a partially observed Markov source. READ MORE

  2. 2. MRI evaluation and image processing in gel dosimetry. A study of selected MRI properties and image processing in 3D gel dosimetry

    University dissertation from Department of Radiation Physics, Lund university

    Author : Peter Magnusson; [2001]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; image registering; multi-slice; slice profile; ferrous sulphate; polyacrylamide; 3D volume acquisition; RF field; B1 field; relaxation time; T1; T2; spin-echo; multi-spin-echo; stochastic noise; nonuniformity; SNR; radiologi; tomografi; medicinsk instrumentering; Radiopharmaceutical technology; Radiofarmaceutisk teknik; Physics; Fysik;

    Abstract : Gel dosimetry is a new dosimetry method applied in radiation therapy. Gel dosimeters consist of a radiation sensitive gel, which can integrate absorbed doses from several radiation sources or beams. The dose to the gel can be evaluated by magnetic resonance imaging (MRI), a procedure that is the focus of the present thesis. READ MORE

  3. 3. Analysis of Relay Channels and Improved Iterative Decoders for Turbo-Coded Decode-and-Forward Relay Channels

    University dissertation from Department of Radiation Physics, Lund university

    Author : Khoa Huynh; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; detect-and-forward; maximum a posteriori; decode-and-forward; Maximum likelihood; iterative decoder.; relay channels; equivalent SNR; upper bound;

    Abstract : Three-node relay channels which consist of a source, a relay and a destinationare considered in this thesis. In the first part, an uncoded relay channelis studied. READ MORE

  4. 4. Computerised Microtomography Non-invasive imaging and analysis of biological samples, with special reference to monitoring development of osteoporosis in small animals

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Mats Stenström; Gudrun Alm Carlsson; Carl Carlsson; Jim Elliot; [2001]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Computed microtomography; CμT; signal-to-noise ratio SNR ; non-invasive monitoring; morphological changes; Gastrectomized Sprague-Dawley; osteoporosis; MEDICINE; MEDICIN;

    Abstract : The use of Computerised microtomography (CμT) in biomedical research is well established, with most applications developed at synchrotron facilities. The possibility to non-invasively monitor morphological changes in biological samples, makes it an attractive technique in biomedicine. READ MORE

  5. 5. Search for Type 2 Diabetes Susceptibility Genes Using Multiple Approaches

    University dissertation from Cecilia Lindgren, UMAS ing. 46, 205 02 Malmö, Sweden

    Author : Cecilia Lindgren; [2002]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; single nucleotide polymorphism SNP ; transmission-disequilibrium test TDT ; genetic variation; single strand conformational polymorphism SSCP ; gene expression; insulin; glucose; genome-wide scan; linkage; genetic association; Type 2 diabetes; early onset diabetes EOD ; sekretion; diabetologi; Endokrinologi; diabetology; Endocrinology; secreting systems; signal-to-noise ratio SNR ;

    Abstract : Type 2 diabetes mellitus is a multifactorial disorder characterized by chronic hyperglycemia resulting from pancreatic dysfunction and insulin resistance. It is a common disorder with a complex pattern of inheritance, likely to reflect the influence of multiple genetic and environmental factors on the diabetes risk. READ MORE