Sökning: "Digital data transmission"

Visar resultat 21 - 25 av 118 avhandlingar innehållade orden Digital data transmission.

  1. 21. Multilevel Modulation and Transmission in VCSEL-based Short-range Fiber Optic Links

    Författare :Tamas Lengyel; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; IM DD; NRZ OOK; intensity modulation; 3-PAM; inter-symbol interference; Data communication; multimode fiber; vertical cavity surface emitting lasers; 4-PAM; optical interconnects; short-range fiber optic links;

    Sammanfattning : As the demand for ever higher throughput short-range optical links is growing, research and industry associations have shown increased interest in multilevel modulation formats, such as the four leveled pulse amplitude modulation, referred to as 4-PAM. As on-off keying (OOK) persists to be the choice for low latency applications, for example high performance computing, datacenter operators see 4-PAM as the next format to succeed current OOK-based optical interconnects. LÄS MER

  3. 22. Bandwidth Efficient IPTV Distribution : On Error Resilience and Fast Channel Change

    Författare :Ulf Jennehag; Tingting Zhang; Stefan Pettersson; Nikolaus Färber; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; IPTV distribution; Computer and systems science; Data- och systemvetenskap;

    Sammanfattning : Television is now changing its traditional distribution forms to being distributed digitally over broadband networks. The recent development of broadband Internet connectivity has made the transition to Internet Protocol Television (IPTV) possible. LÄS MER

  4. 23. On signal processing and electromagnetic modelling : applications in antennas and transmission lines

    Författare :Jonas Lundbäck; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vector sensors; Statistical signal processing; Antennas; Directional Coupler; Tranmission lines; Partial discharge;

    Sammanfattning : This doctoral thesis is comprised of five parts. The first three parts concern signal processing and electromagnetic modelling of multiport antennas. The last two parts concern signal processing and transmission line theory applied to wave splitting on transmission lines. LÄS MER

  5. 24. Compensation of Laser Phase Noise Using DSP in Multichannel Fiber-Optic Communications

    Författare :Arni Alfredsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multichannel transmission; rotations; digital signal processing; laser phase noise; Coherent fiber-optic communications; detection; estimation;

    Sammanfattning : One of the main impairments that limit the throughput of fiber-optic communication systems is laser phase noise, where the phase of the laser output drifts with time. This impairment can be highly correlated across channels that share lasers in multichannel fiber-optic systems based on, e.g. LÄS MER

  7. 25. Design and analysis of digital receivers

    Författare :Per Ödling; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : This thesis consists of a summary and nine included papers, grouped into three parts. There is one journal paper, three reports written in the style of articles, four conference papers and one paper submitted to a conference. LÄS MER