Search for dissertations about: "UWB channel"

Showing result 1 - 5 of 13 swedish dissertations containing the words UWB channel.

  1. 1. On Modulation and Detection Schemes for Low-Complexity Impulse Radio UWB Communications

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Muhammad Gufran Khan; Blekinge Tekniska Högskola.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; UWB; RAKE; Transmitted reference; Energy detection; Channel measurements; BPPM;

    Abstract : Due to wealth of advantages offered by short range ultra wideband (UWB) technology, such as capacity improvement, fading reduction and localization, it has gathered a considerable attention. Distinct UWB qualities also pose many system design challenges like difficulties in using digital processing, complex channel estimation and different propagation characteristics. READ MORE

  2. 2. Measurement-Based Modeling of Wireless Propagation Channels - MIMO and UWB

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Johan Kåredal; Lund University.; Lunds universitet.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; personal area networks; MIMO; channel modeling; Propagation; channel measurements; vehicle-to-vehicle communicationa; ultra-wideband;

    Abstract : Future wireless systems envision higher speeds and more reliable services but at the same time face challenges in terms of bandwidth being a limited resource. Two promising techniques that can provide an increased throughput without requiring additional bandwidth allocation are multiple-input multiple-output (MIMO) systems and ultra-wideband (UWB) systems. READ MORE

  3. 3. Ultra-Wideband Wireless Channels - Estimation, Modeling and Material Characterization

    University dissertation from Department of Electrical and Information Technology, Lund University

    Author : Telmo Santos; Lund University.; Lunds universitet.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultra-wideband; channel modeling; channel parameter estimation; material characterization; microwave measurements;

    Abstract : This licentiate thesis is focused on the characterization of ultra-wideband wireless channels. The thesis presents results on ultra-wideband communications as well as on the ultra-wideband characterization of materials. The communications related work consisted in the measurement and modeling of outdoor scenarios envisioned for infostation systems. READ MORE

  4. 4. On Receiver Algorithms for OFDM Systems

    University dissertation from Department of Electrical and Information Technology, Lund University

    Author : Florent Munier; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quantisation; multicarrier modulation; Intercarrier Interference ICI ; Phase noise; Wiener process; orthogonal frequency division multiplexing OFDM ; estimation; fading channels; channel estimation; iterative decoding.;

    Abstract : This thesis addresses the problem of designing a receiver for an Orthogonal FrequencyDivisionMultiplexing (OFDM)communication system operating over fading channels, taking into account the effects of hardware imperfections. We discuss solutions for efficiently estimating the parameters of a channel model and for compensating oscillator phase noise and analog to digital converter (ADC) quantisation errors at the receiver. READ MORE

  5. 5. On Coherent and Non-coherent Receiver Structures for Impulse Radio UWB Systems

    University dissertation from Karlskrona : Blekinge Institute of Technology

    Author : Muhammad Gufran Khan; Blekinge Tekniska Högskola.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The demand and growth of short-range wireless communications has been tremendous in the past few years for a diverse range of applications. There is significant interest in ultra wideband (UWB) as a physical layer technology for both high-data-rate (HDR), and low power, low-data-rate (LDR) short-range communications. READ MORE