Sökning: "phase-locked loop"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden phase-locked loop.

  1. 1. Performance and implementation issues in local area networks

    Författare :Arne Dahlberg; Chalmers University of Technology; []
    Nyckelord :loop filter; performance analysis; simulation; phase locked-loop; network interface; charge pump; phase jitter; local area networks; phase frequency detector; network file systems;

    Sammanfattning : .... LÄS MER

  2. 2. On Control of Permanent-Magnet Synchronous Motors in Hybrid-Electric Vehicle Applications

    Författare :Oskar Wallmark; Chalmers University of Technology; []
    Nyckelord :phase-locked loop; signal injection; Electric drive; sensorless control; harmonics; position estimation; speed estimation; hybrid-electric vehicle; permanent-magnet synchronous motor; electric vehicle; vector control;

    Sammanfattning : This thesis deals with design and analysis of the control system structure for electric drives equipped with permanent-magnet synchronous motors with a salient rotor. The intended application is propulsion in electric- and hybrid-electric vehicles. LÄS MER

  3. 3. Micro- and Millimeter Wave CMOS Beamforming Receivers

    Författare :Andreas Axholt; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; beamforming; CMOS; front-end; microwave; millimeter wave; phase-locked loop; phased-array;

    Sammanfattning : The available bandwidth in wireless communication systems, such as the 802.11 family, is very limited. Together with the ever increasing data traffic, this causes problems. New possibilities are, however, available thanks to wide license-free bandwidth allocated at higher frequencies. LÄS MER

  4. 4. Control of permanent-magnet synchronous machines in automotive applications

    Författare :Oskar Wallmark; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; in-wheel motor; sensorless control; electric vehicle; permanent-magnet synchronous machine; loss minimization; inverter; Electric drive; position estimation; vector control; hybrid electric vehicle; phase-locked loop; fault tolerance;

    Sammanfattning : This thesis deals with the design and analysis of control system structures for electric drives equipped with permanent-magnet synchronous machines (PMSMs) in automotiveapplications.Sensorless control, meaning vector control without a mechanical rotor position sensor, is considered and a speed and position estimator of phase-locked loop type is analyzed thoroughly. LÄS MER

  5. 5. Modeling and Estimation of Phase Noise in Oscillators with Colored Noise Sources

    Författare :M Reza Khanzadi; Chalmers University of Technology; []
    Nyckelord :Phase Noise Model; Bayesian Cramer-Rao Bound; Voltage-controlled Oscillator; Extended Kalman Filter Smoother; Maximum a Posteriori Estimator; Colored Phase Noise; Oscillator Phase Noise; Phase-Locked Loop; Mean Square Error.;

    Sammanfattning : The continuous increase in demand for higher data rates due to applications with massive number of users motivates the design of faster and more spectrum efficient communication systems. In theory, the current communication systems must be able to operate close to Shannon capacity bounds. LÄS MER