Design, Implementation and Characterization of a Cooperative Communications System

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dc.contributor.advisorSabharwal, Ashutoshen_US
dc.creatorMurphy, Patrick O.en_US
dc.date.accessioned2013-03-08T00:36:59Zen_US
dc.date.available2013-03-08T00:36:59Zen_US
dc.date.issued2011en_US
dc.description.abstractCooperative communications is a class of techniques which seek to improve reliability and throughput in wireless systems by pooling the resources of distributed nodes. While cooperation can occur at different network layers and time scales, physical layer cooperation at symbol time scales offers the largest benefit. However, symbol level cooperation poses significant implementation challenges, especially in the context of a network of distributed nodes. We first present the design and implementation of a complete cooperative physical layer transceiver, built from scratch on the Wireless Open-Access Research Platform (WARP). In our implementation fully distributed nodes employ physical layer cooperation at symbol time scales without requiring a central synchronization source. Our design supports per-packet selection of non-cooperative or cooperative communication, with cooperative links utilizing either amplify-and-forward or decode-and-forward relaying. A single design implements transmission, reception and relaying, allowing each node to assume the role of source, destination or relay per packet. We also present experimental methodologies for evaluating our design and extensive experimental results of our transceiver's performance under a variety of topologies and propagation conditions. Our methods are designed to test both overall performance and to isolate and understand the underlying causes of performance limitations. Our results clearly demonstrate significant performance gains (more than 50× improvement in PER in some topologies) provided by physical layer cooperation even when subject to the constraints of a real-time implementation. As with all our work on WARP, our transceiver design and experimental framework are available via the open-source WARP repository for use by other wireless researchers.en_US
dc.format.extent227 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS E.E. 2011 MURPHYen_US
dc.identifier.citationMurphy, Patrick O.. "Design, Implementation and Characterization of a Cooperative Communications System." (2011) Diss., Rice University. <a href="https://hdl.handle.net/1911/70364">https://hdl.handle.net/1911/70364</a>.en_US
dc.identifier.digitalMurphyPen_US
dc.identifier.urihttps://hdl.handle.net/1911/70364en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectApplied sciencesen_US
dc.subjectCooperative communicationen_US
dc.subjectFPGAen_US
dc.subjectOFDMen_US
dc.subjectComputer engineeringen_US
dc.subjectElectrical engineeringen_US
dc.titleDesign, Implementation and Characterization of a Cooperative Communications Systemen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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