Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-010807-213448


Document Typethesis
Author NameMcGinley, James W
URNetd-010807-213448
TitleReal-Time Software-Defined-Radio Implementation of a Two Source Distributed Beamformer
DegreeMS
DepartmentElectrical & Computer Engineering
Advisors
  • Donald R. Brown, Advisor
  • Richard Vaz, Committee Member
  • John McNeill, Committee Member
  • Keywords
  • software defined radio
  • beamforming
  • distributed beamformer
  • Date of Presentation/Defense2006-12-08
    Availability unrestricted

    Abstract

    This thesis describes a real-time software-defined-radio

    implementation of a two source distributed beamformer. The

    technique in this thesis can be used to synchronize the carriers

    of two single antenna wireless transmitters (i.e. ``sources") with

    independent local clocks so that their bandpass transmissions

    arrive in-phase at an intended receiver (i.e. ``destination").

    Synchronization is achieved via: (i) an unmodulated beacon

    transmitted by the destination to the sources and (ii) a pair of

    secondary unmodulated beacons between the sources. No

    explicit channel state information is exchanged between the

    sources and/or the destination. Using this method, it is possible

    to realize a two-source distributed beamformer that provides a

    reduction in overall transmit energy and increased security due

    to the directionality of the transmitted signal. System

    characterization results are provided along with experimental

    results for both time-invariant and time-varying channels. The

    experimental results in this thesis confirm the theoretical

    predictions and also provide explicit guidelines for a real-time

    implementation of a two-source distributed beamforming

    system.

    Files
  • mcginley.pdf

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