; ; ; "ActiveFedora::Aggregation::ListSource" . a , ; "Real-Time Software-Defined-Radio Implementation of a Two Source Distributed Beamformer"; "Vaz, Richard", "McNeill, John A."; "depositor@wpi.edu"; "Brown, Donald R."; "Vaz, Richard", "McNeill, John A.", "Brown, Donald R."; "McGinley, James W"; "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."; "English"; "Worcester Polytechnic Institute"; "distributed beamformer", "beamforming ", "software defined radio"; "2007-01-08"; "2007"; "2006-12-08"; "2019-06-29T00:06:40.969350043+00:00"^^; "etd-010807-213448"; ; "2020-11-20T10:38:17.262648237-05:00"^^; "Thesis"; "MS"; "Electrical & Computer Engineering"; ; ; "http://rightsstatements.org/vocab/InC/1.0/"; ; ; ; "Etd" . ; .