Sökning: "radio receivers"

Visar resultat 1 - 5 av 92 avhandlingar innehållade orden radio receivers.

  1. 1. Radio : Vardagsliv tillsammans med ett massmedium

    Författare :Elin Franzén; Barbro Blehr; Sverker Hyltén-Cavallius; Alf Arvidsson; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Radio; media use; everyday life; ethnography; phenomenology; Radio; mediebruk; vardagsliv; etnografi; fenomenologi; Ethnology; etnologi;

    Sammanfattning : This thesis examines the radio medium as a phenomenon of experience. The perspective relates to phenomenological philosophy, dealing with human knowledge as an ongoing intentional relationship with the world: to experience is to grasp things such as they appear to the subjective consciousness. LÄS MER

  3. 2. Generalized Bandpass Sampling Receivers for Software Defined Radio

    Författare :Yi-Ran Sun; Svante Signell; Markku K. Renfors; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Radio receivers; Software Defined Radio SDR ; uniform nonuniform sampling; reconstruction; bandpass sampling; noise aliasing; sampling jitter; generalized bandpass sampling; complex signal processing; complex FIR and IIR filter design; Switched-Capacitor SC circuit; Electrical engineering; Elektroteknik;

    Sammanfattning : Based on different sampling theorem, for example classic Shannon’s sampling theorem and Papoulis’ generalized sampling theorem, signals are processed by the sampling devices without loss of information. As an interface between radio receiver front-ends and digital signal processing blocks, sampling devices play a dominant role in digital radio communications. LÄS MER

  4. 3. Dielectrically Loaded Quad-ridge Flared Horns for Ultra Wideband Reflector Feed Applications in Radio Astronomy

    Författare :Jonas Flygare; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dielectric loaded antennas; dielectric materials; reflector antenna feeds; radio astronomy; ultra wideband antennas; quad-ridge flared horn qrfh ; radio receivers; horn antennas; broadband antennas; aperture antennas.;

    Sammanfattning : Reflector-based radio telescopes are used as tools for observations in both radio astronomy and space geodesy. To observe the weak sources in space, highly sensitive receivers, fronted by optimized reflector feeds, are therefore needed. LÄS MER

  5. 4. Nonuniform bandpass sampling in radio receivers

    Författare :Yi-Ran Sun; Svante Signell; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer engineering; Datorteknik;

    Sammanfattning : As an interface between radio receiver front-ends and digital signal processing blocks, sampling devices play a dominant role in digital radio communications. As an interface between radio receiver front-ends and digital signal processing blocks, sampling devices play a dominant role in digital radio communications. LÄS MER

  7. 5. Flexible wireless receivers : on-chip testing techniques and design for test

    Författare :Ramzan Rashad; Fenghao Mu; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : In recent years the interest in the design of low cost multistandard mobile devices has gone from technical aspiration to commercial essential. Usually, the emerging wireless applications prompt the conception of new wireless standards. The end user wants to access voice, data, and streaming media from single wireless terminal. LÄS MER