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dc.contributor.advisorChatterjee, Abhijit
dc.contributor.authorSen, Shreyasen_US
dc.date.accessioned2013-01-17T20:47:37Z
dc.date.available2013-01-17T20:47:37Z
dc.date.issued2011-08-22en_US
dc.identifier.urihttp://hdl.handle.net/1853/45755
dc.description.abstractThe objective of the proposed research is to investigate the design of Self-Aware Radio Frequency Circuits and Wireless Communication Systems that can adapt to environmental and process variations to always operate at minimum power levels possible, extending battery life. The explosive growth of portable battery operated devices has mandated design of low power circuits and systems to prolong battery life. These devices fabricated in modern nanoscale CMOS technologies suffer from severe process variation due to the reduced controllability of the fabrication process, causing yield loss. This calls for integrated low power and process tolerant design techniques, or design of systems that can adapt to its process and environment to maintain its performance while minimizing power consumption. Currently, most of the wireless circuits are designed to meet minimum quality-of-service requirements under worst-case wireless link conditions (interference, noise, multi-path effects), leading to high power consumption when the channel is better than worst-case. In this research, we develop a multi-dimensional adaptation approach for wireless transmitters and receivers that optimally trades-off power vs. performance across temporally changing operating conditions by concurrently tuning control parameters in the RF front end to lower power consumption. Tunable circuits (e.g. LNA) with built-in tuning knobs providing independent controllability of important specifications allow optimal adaptation. Process sensing using intelligent test and calibration facilitates yield improvement and the design of process tolerant environment adaptive systems. Low cost testing methodologies are developed for identification of the health of the wireless circuit/system. These are used in conjunction with tuning algorithms that tune a wireless system under process variation to meet performance specifications and recover yield loss. This testing and adaptation is performed once during the post manufacture test/tune phase to compensate for manufacturing variations. This can also be applied periodically during in field operation of a device to account for performance degradation due to ageing. Finally, process tolerant environment adaptive systems are designed.en_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectProcess variation tolerant low power RF/AMSen_US
dc.subject.lcshElectric batteries
dc.subject.lcshElectric power supplies to apparatus
dc.subject.lcshLow voltage integrated circuits
dc.subject.lcshLow voltage systems
dc.subject.lcshMicroprocessors
dc.titleDesign of process and environment adaptive ultra-low power wireless circuits and systemsen_US
dc.typeText
dc.description.degreePhDen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.contributor.committeeMemberBonnie Heck Ferri
dc.contributor.committeeMemberDavid Keezer
dc.contributor.committeeMemberSaibal Mukhopadhyay
dc.contributor.committeeMemberSatish Kumar
dc.type.genreDissertation


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