WATCH: Enabling WiFi in Active TV Channels

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dc.contributor.advisorKnightly, Edward W.
dc.contributor.committeeMemberZhong, Lin
dc.contributor.committeeMemberAazhang, Behnaam
dc.creatorZhang, Xu
dc.date.accessioned2016-01-07T22:17:02Z
dc.date.available2016-01-07T22:17:02Z
dc.date.created2014-12
dc.date.issued2014-10-08
dc.date.submittedDecember 2014
dc.date.updated2016-01-07T22:17:02Z
dc.description.abstract"White spaceā€ model allows TV channels that are not being used regionally by a TV broadcaster to be re-purposed for secondary access. Unfortunately, populated areas have few these unused channels. Nonetheless, Nielsen data show severe under-utilization with vast regions in range of TV transmitters having no active TV receivers even at peak TV viewing time. In this thesis, I present the design, implementation, and evaluation of WATCH (WiFi in Active TV CHannels), the first system to (i) enable secondary WiFi transmission in the presence of kilowatt-scale TV transmitters by employing WATCH-IC (Interference Cancellation) and CAT (Constructive Addition Transmission); (ii) protect active TV receivers by employing their spatial-spectral requirements. With FCC permission to test WATCH implementation, I show that WATCH can provide at least 6.0 times the total achievable rate to 4 watt secondary devices compared to white space model, while increasing the TV channel switching time by less than 5%.
dc.format.mimetypeapplication/pdf
dc.identifier.citationZhang, Xu. "WATCH: Enabling WiFi in Active TV Channels." (2014) Masterā€™s Thesis, Rice University. <a href="https://hdl.handle.net/1911/87788">https://hdl.handle.net/1911/87788</a>.
dc.identifier.urihttps://hdl.handle.net/1911/87788
dc.language.isoeng
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.
dc.subjectSpectrum re-use
dc.subjectTV white space
dc.subjectDatabase controller
dc.subjectTV receiver feedback
dc.subjectInterference cancellation
dc.subjectTransmit beamforming
dc.titleWATCH: Enabling WiFi in Active TV Channels
dc.typeThesis
dc.type.materialText
thesis.degree.departmentElectrical and Computer Engineering
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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