Sökning: "Digital data transmission"

Visar resultat 1 - 5 av 89 avhandlingar innehållade orden Digital data transmission.

  1. 1. On High-Speed Digital-to-Analog Converters and Semi-Digital FIR Filters

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Mohammad Reza Sadeghifar; Linköpings universitet.; Linköpings universitet.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DAC; RFDAC; SDFIR; FIR; semi-digital FIR filter; digital-to-analog converter; D A converter; data converter; mixed-signal integrated circuits; mixer DAC; IQ modulator; transmitter;

    Sammanfattning : High-speed and high-resolution digital-to-analog converters (DACs) are vital components in all telecommunication systems. Radio-frequency digital-to-analog converter (RFDAC) provides high-speed and high-resolution conversion from digital domain to an analog signal. RFDACs can be employed in direct-conversion radio transmitter architectures. LÄS MER

  2. 2. Image analysis and interactive visualization techniques for electron microscopy tomograms

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Lennart Svensson; Sveriges lantbruksuniversitet.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Images are an important data source in modern science and engineering. A continued challenge is to perform measurements on and extract useful information from the image data, i.e., to perform image analysis. LÄS MER

  3. 3. Mobile Supported e-Government Systems Analysis of the Education Management Information System (EMIS) in Tanzania

    Detta är en avhandling från Karlstad : Karlstad University

    Författare :Gudrun Wicander; Karlstads universitet.; Karlstads universitet.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; e-Government systems; mobile telephony; SMS; blended digital system; education management; information systems; systems theory; developing countries; Tanzania; ICT4D; M4D; Information Systems; Informatik;

    Sammanfattning : e-Government systems are considered by both governments and international organisations to improve administration and management. In Tanzania, an e-government system for education administration, EMIS, is partly implemented but shows several limitations. LÄS MER

  4. 4. Submerged Transmission in Wave Energy Converters Full Scale In-Situ Experimental Measurements

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Erland Strömstedt; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wave energy converter; direct drive; submerged transmission; piston rod; seal housing; sealing system; laser triangulation sensor; offshore measurements; relative displacement; vibrations; tilt angle; tilting; wear estimation.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Different wave power technologies are in development around the world in different stages of prototype testing. So far only a few devices have been deployed offshore at full scale for extended periods of time. Little data is published about how these different devices perform. LÄS MER

  5. 5. Improving Low-Power Wireless Protocols with Timing-Accurate Simulation

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Fredrik Österlind; Uppsala universitet.; Uppsala universitet.; SICS.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Datavetenskap med inriktning mot datorkommunikation; Computer Science with specialization in Computer Communication; Low-Power Wireless Protocols; Wireless Sensor Networks; Contiki; Cooja; Simulation;

    Sammanfattning : Low-power wireless technology enables numerous applications in areas from environmental monitoring and smart cities, to healthcare and recycling. But resource-constraints and the distributed nature of applications make low-power wireless networks difficult to develop and understand, resulting in increased development time, poor performance, software bugs, or even network failures. LÄS MER