Search for dissertations about: "signal-to-noise ratio"

Showing result 16 - 20 of 224 swedish dissertations containing the words signal-to-noise ratio.

  2. 16. Directly exposed electron-detectors for electron energy-loss spectroscopy

    Author : Claes Orsholm; Tomas Lindblad; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Abstract : This thesis investigates the possibilities of using planar silicon-devices such as the photodiode array and the charge-coupled device (CCD) as directly exposed electron-detectors for electron energy-loss spectroscopy. The aim is to achieve an acceptable performance at low signal intensities, enabling single electron detection. READ MORE

  4. 17. Visuo-motor performance in children visually impaired due to fetal alcohol syndrome (FAS)

    Author : Kristina Gummel; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Purpose: To investigate the ophthalmological characteristics and to evaluate the magnocellular function in Russian orphanage children with fetal alcohol syndrome (FAS). Methods: In the study 100 children aged 10-16 from Russian (St Petersburg) orphanages were examined: 50 with FAS and 50 control children. READ MORE

  5. 18. Channel Related Optimization of Wireless Communication Systems

    Author : Fredrik Tufvesson; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; time division duplex; multicarrier; Radio communication; orthogonal frequency division multiplex; channel estimation; pilot symbol assisted modulation; sub-channel spacing; sub-channel bandwidth; interchannel interference; cyclic prefix; intersymbol interference; Rayleigh fading; precoding; pre-compensation;

    Abstract : This thesis deals with different optimization problems in the design of wireless communication systems. It is mainly directed to the design of systems based on multicarrier techniques and orthogonal frequency division multiplex, OFDM, but some of the problems apply to single carrier systems as well. READ MORE

  6. 19. High-Tc SQUIDs for magnetophysiology - development of a magnetometer system and measurements of evoked fields from hippocampal neurons in vitro

    Author : Per Magnelind; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; neuromagnetism; brain slice; neurophysiology; electrophysiology; hippocampus; biomagnetism; SQUID;

    Abstract : This thesis concerns development of a system based on a high-transition-temperature superconducting quantum interference device (high-Tc SQUID) magnetometer. The system has been designed and used for magnetic field recordings from brain slices, i.e. magnetophysiology. READ MORE

  7. 20. Skin cancer as seen by electrical impedance

    Author : Peter Åberg; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Electrical impedance; skin cancer; pattern recognition; screening;

    Abstract : This thesis describes the relation between skin cancer and electrical impedance. On the cellular level, electrical impedance measured at clinically relevant frequencies is affected by e.g. READ MORE