Search for dissertations about: "Sven Jacobsson"

Showing result 1 - 5 of 12 swedish dissertations containing the words Sven Jacobsson.

  2. 1. Massive MIMO with Low-Resolution Data Converters: Algorithm Design and Performance Evaluation

    Author : Sven Jacobsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Massive multiuser multiple-input multiple-output (MIMO) is foreseen to be a key technology in next-generation (5G) cellular communication systems, due to huge potential gains in spectral efficiency and energy efficiency. In this thesis, we investigate the performance of massive MIMO systems, which operate over a Rayleigh-fading channel, for the case when the base station (BS) is equipped with low-resolution data converters. READ MORE

  4. 2. Massive Multi-Antenna Communications with Low-Resolution Data Converters

    Author : Sven Jacobsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; orthogonal frequency-division multiplexing; channel estimation; quantization; linear precoding; convex optimization; nonlinear precoding; linear combing; hardware impairments; analog-to-digital converter; beamforming; Massive multi-user multiple-input multiple-output; digital-to-analog converter;

    Abstract : Massive multi-user (MU) multiple-input multiple-output (MIMO) will be a core technology in future cellular communication systems. In massive MU-MIMO systems, the number of antennas at the base station (BS) is scaled up by several orders of magnitude compared to traditional multi-antenna systems with the goals of enabling large gains in capacity and energy efficiency. READ MORE

  5. 3. Cold trapping and reinjection techniques for gas chromatography-mass spectrometry

    Author : Sven P. Jacobsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis describes the use of cold trapping and reinjection techniques in combination with gas chromatography-mass spectrometry. A summary of different cold trap/ reinjection systems is presented. READ MORE

  6. 4. Clinical and experimental studies on total hip arthroplasty

    Author : Sven-Arne Jacobsson; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : In a 12-year follow-up study, a low-friction, metal-on-plastic hip prosthetic system (Charnley) was compared with a high-friction, metal-on-metal prosthetic system (McKeeFarrar) in a consecutive series of 169 patients, mean age 67 at the start. Satisfactory results were reported in 92 percent of the patients. READ MORE

  7. 5. Processing and analysis of NMR data : Impurity determination and metabolic profiling

    Author : Jenny Forshed; Sven P. Jacobsson; Jules L. Griffin; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantitative nuclear magnetic resonance spectrometry; qNMR; multivariate analysis; peak alignment; data fusion; Analytical chemistry; Analytisk kemi;

    Abstract : This thesis describes the use of nuclear magnetic resonance (NMR) spectrometry as an analytical tool. The theory of NMR spectroscopy in general and quantitative NMR spectrometry (qNMR) in particular is described and the instrumental properties and parameter setups for qNMR measurements are discussed. READ MORE