Sökning: "mm-wave"

Visar resultat 1 - 5 av 45 avhandlingar innehållade ordet mm-wave.

  1. 1. Transmitter Linearization for mm-Wave Communications Systems

    Författare :Halil Volkan Hünerli; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mm-wave power amplier; Eband; transmitter; analog predistorter; linearization; digital predistortion;

    Sammanfattning : There is an ever increasing need for enabling higher data rates in modern communication systems which brings new challenges in terms of the power consumption and nonlinearity of hardware components. These problems become prominent in power amplifiers (PAs) and can significantly degrade the performance of transmitters, and hence the overall communication system. LÄS MER

  2. 2. Advanced Analog MMICs for mm-wave Communication and Remote Sensing in 0.15µm mHEMT Technology

    Författare :Marcus Gavell; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GaAs; Point-To-Point; E-band; Modulators; HEMT; Receiver; microwave; Mixers; Geostationary; mm-wave;

    Sammanfattning : Multi-Gigabit per second wireless communication and atmospheric remote sensing for weather forecasts are new applications in the mm-wave frequency spectra. The High Electron Mobility Transistor is an excellent technology for high frequency mm-wave applications. Its low noise and linear performance makes a 0. LÄS MER

  3. 3. Development of components for mm-wave radio astronomy instrumentation / Vessen V. Vassilev

    Författare :Vessen Vassilev; Chalmers University of Technology; []
    Nyckelord :band-pass amplifier; mm-wave reciever; radio astronomy instrumentation; waveguide to microstrip transition; sideband separation reciever; SIS mixer; active equalizer;

    Sammanfattning : .... LÄS MER

  4. 4. Mm-wave Radio Astronomy Instrumentation for the Onsala Space Observatory and SEST

    Författare :Nicholas D. Whyborn; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mm-wave receiver; phase retrieval holography; focal plane imaging array; radio astronomy instrumentation; SIS mixer;

    Sammanfattning : The thesis presents work done in developing instrumentation for mm- and submm-wave radio astronomy. The work described is in several fields. The greater part of the thesis is concerned with sensitive heterodyne receivers and in particular the cryogenically cooled mixers. In paper A the SEST telescope and its observing system are described. LÄS MER

  5. 5. mm-Wave Data Transmission and Measurement Techniques: A Holistic Approach

    Författare :Dhecha Nopchinda; Chalmers University of Technology; []
    Nyckelord :estimation theory; data transmission experiment; spectral efficiency; microwave network analysis; communication system; millimeter wave mm-wave system; mutual coupling effects; spectrally efficient frequency division multiplexing SEFDM ; vector network analyzer; wideband measurement.; coherent optical system; impairment compensation algorithm; identification theory; multiplier based transmitter; digital signal processing; Active load pull; linear measurement technique;

    Sammanfattning : The ever-increasing demand on data services places unprecedented technical requirements on networks capacity. With wireless systems having significant roles in broadband delivery, innovative approaches to their development are imperative. LÄS MER