Analysis and Implementation of a Novel Single Channel Direction Finding Algorithm on a Software Radio Platform

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dc.contributor.authorKeaveny, John Josephen
dc.contributor.committeechairBuehrer, R. Michaelen
dc.contributor.committeememberReed, Jeffrey H.en
dc.contributor.committeememberTranter, William H.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2014-03-14T20:32:02Zen
dc.date.adate2005-03-07en
dc.date.available2014-03-14T20:32:02Zen
dc.date.issued2005-02-11en
dc.date.rdate2008-03-07en
dc.date.sdate2005-02-21en
dc.description.abstractA radio direction finding (DF) system is an antenna array and a receiver arranged in a combination to determine the azimuth angle of a distant emitter. Basically, all DF systems derive the emitter location from an initial determination of the angle-of-arrival (AOA). Radio direction finding techniques have classically been based on multiple-antenna systems employing multiple receivers. Classic techniques such as MUSIC [1][2] and ESPRIT use simultaneous phase information from each antenna to estimate the angle-of-arrival of the signal of interest. In many scenarios (e.g., hand-held systems), however, multiple receivers are impractical. Thus, single channel techniques are of interest, particularly in mobile scenarios. Although the amount of existing research for single channel DF is considerably less than for multi-channel direction finding, single channel direction finding techniques have been previously investigated. Since many of the single channel direction finding techniques are older analog techniques and have been analyzed in previous work, we will investigate a new single channel direction finding technique that takes specific advantage of digital capabilities. Specifically, we propose a phase-based method that uses a bank of Phase-Locked Loops (PLLs) in combination with an eight-element circular array. Our method is similar to the Pseudo-Doppler method in that it samples antennas in a circular array using a commutative switch. In the proposed approach the sampled data is fed to a bank of PLLs which track the phase on each element. The parallel PLLs are implemented in software and their outputs are fed to a signal processing block that estimates the AOA. This thesis presents the details of the new Phase-Locked Loop (PLL) algorithm and compares its performance to existing single channel DF techniques such as the Watson-Watt and the Pseudo-Doppler techniques. We also describe the implementation of the PLL algorithm on a DRS Signal Solutions, Incorporated (DRS-SS) WJ-8629A Software Definable Receiver with Sunriseā„¢ Technology and present measured performance results.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-02212005-184200en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02212005-184200/en
dc.identifier.urihttp://hdl.handle.net/10919/31300en
dc.publisherVirginia Techen
dc.relation.haspartkeavenyscdf1.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPseudo-Doppleren
dc.subjectCircular Antenna Arrayen
dc.subjectSoftware-Defined Radioen
dc.subjectSingle Channel Direction Finding Systemsen
dc.subjectWatson-Watten
dc.subjectAdcock Antenna Arrayen
dc.titleAnalysis and Implementation of a Novel Single Channel Direction Finding Algorithm on a Software Radio Platformen
dc.typeThesisen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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