Sökning: "multicarrier"

Visar resultat 16 - 19 av 19 avhandlingar innehållade ordet multicarrier.

  1. 16. Detection in Digital Communication Systems with Phase Noise

    Författare :Florent Munier; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase noise; estimation; single carrier modulation; Wiener process;

    Sammanfattning : In every communication system, the limitations of the hardware sets a constraint on the overall system performance. More often than not, these limitations are not taken into account during the system design stage where the hardware is considered ideal. LÄS MER

  3. 17. Multipactor in low pressure gas and in nonuniform rf field structures

    Författare :Richard Udiljak; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; detection methods; iris; low pressure gas; coax; nonuniform fields; Multipactor; microwave discharge; breakdown; discharge;

    Sammanfattning : Resonant electron multiplication in vacuum, multipactor, is analysed for several geometries where the RF electric field is nonuniform. In particular, it is shown that the multipactor behaviour in a coaxial line is both qualitatively and quantitatively different from that observed with the conventionally used simple parallel-plate model. LÄS MER

  4. 18. Single frequency broadcasting networks

    Författare :Göran Malmgren; KTH; []
    Nyckelord :;

    Sammanfattning : An Orthogonal Frequency Division Multiplexing (OFDM) schemeallows all transmitters in a radio network to transmitidentical signals in the same frequency block, forming a socalled Single Frequency Network (SFN). By avoiding frequencyreuse, substantial improvements in bandwidth utilisation arepossible. LÄS MER

  5. 19. Partial Response and Faster-than-Nyquist Signaling

    Författare :Fredrik Rusek; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication engineering; Signalbehandling; Signal processing; Partial Response Signaling; Faster-than-Nyquist Signaling; Digital Communications; Coding Theory; Telekommunikationsteknik;

    Sammanfattning : Bandwidth efficiency is a key objective in the design of a digital communication system. Traditionally it is accomplished by increasing the constellation size of the signaling system. In this thesis alternative techniques are studied. Because the communication channel is continuous, so must the actual time signals be. LÄS MER