Sökning: "power spectrum"

Visar resultat 21 - 25 av 324 avhandlingar innehållade orden power spectrum.

  1. 21. Cold-Electron Bolometer with Superconductor-Insulator-Normal Metal Tunnel Junctions

    Författare :Ian Jasper Agulo; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; temperature sensitivity; cryogenfree; power sensitivity; noise equivalent power; cold-electron bolometer; SIN tunnel junctions; electron cooling;

    Sammanfattning : The Cold-Electron Bolometer (CEB) is an ultrasensitive device designed for the detection of radiation in the terahertz region of the electromagnetic spectrum. The key to its sensitivity is the electron cooling of the absorber by the superconductor-insulator-normal metal (SIN) tunnel junction. LÄS MER

  3. 22. From Orthogonal to Non-orthogonal Multiple Access : Energy- and Spectrum-Efficient Resource Allocation

    Författare :Lei Lei; Di Yuan; Angelakis Angelakis; Erik Bergfeldt; Xiaoli Chu; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The rapid pace of innovations in information and communication technology (ICT) industry over the past decade has greatly improved people’s mobile communication experience. This, in turn, has escalated exponential growth in the number of connected mobile devices and data traffic volume in wireless networks. LÄS MER

  4. 23. Low Power Wireless Technologies for IIoT : Analysis and enhancement of communication delay, reliability and scalability

    Författare :Raúl Rondón; Mikael Gidlund; Fortunato Santucci; Mittuniversitetet; []
    Nyckelord :;

    Sammanfattning : In recent years, the implementation of wireless communication systems in industrial environments has significantly increased. As a result, new applications such as Industrial Internet-of-Things (IIoT) have arisen, reshaping the future of industrial automation. LÄS MER

  5. 24. Nonlinear materials for optical power limiting : characterization and modelling

    Författare :Hampus Lundén; Mikael Lindgren; Cesar Lopes; Bernd Eberle; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : High power laser pulses can be a threat to optical sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that block radiation in chosen wavelength ranges. LÄS MER

  7. 25. Radio Spectrum Regulation in the European Union A three-level context

    Författare :Maria Massaro; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; allocation; assignment; shared competence; radio spectrum regulation; European Union;

    Sammanfattning : In the light of the unprecedented growth of mobile broadband services, radio spectrum regulation is undergoing a substantial review in the European Union (EU). The radio spectrum presents a three-level regulatory context. At international level, the International Telecommunications Union (ITU) regulates the allocation of radio spectrum. LÄS MER