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dc.contributor.authorBa, Seydou Nourouen_US
dc.date.accessioned2010-01-29T19:47:50Z
dc.date.available2010-01-29T19:47:50Z
dc.date.issued2009-11-10en_US
dc.identifier.urihttp://hdl.handle.net/1853/31760
dc.description.abstractThis dissertation studies the design of an efficient adaptive digital baseband predistorter for modern cellular handsets that combines low power consumption, low implementation complexity, and high performance. The proposed enhancements are optimized for hardware implementation. We first present a thorough study of the optimal spacing of linearly-interpolated lookup table predistorters supported by theoretical calculations and extensive simulations. A constant-SNR compander that increases the predistorter's supported input dynamic range is derived. A corresponding low-complexity approximation that lends itself to efficient hardware design is also implemented in VHDL and synthesized with the Synopsys Design Compiler. This dissertation also proposes an LMS-based predistorter adaptation that is optimized for hardware implementation and compares the effectiveness of the direct and indirect learning architectures. A novel predistorter design with quadrature imbalance correction capability is developed and a corresponding adaptation scheme is proposed. This robust predistorter configuration is designed by combining linearization and I/Q imbalance correction into a single function with the same computational complexity as the widespread complex-gain predistorter.en_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectLookup table spacingen_US
dc.subjectIndirect learning architectureen_US
dc.subjectAmplifier linearizationen_US
dc.subjectQuadrature imbalanceen_US
dc.subjectDigital baseband predistortionen_US
dc.subject.lcshSignal processing Digital techniques
dc.subject.lcshDigital communications
dc.subject.lcshDigital telephone systems
dc.titleEfficient digital baseband predistortion for modern wireless handsetsen_US
dc.typeDissertationen_US
dc.description.degreePh.D.en_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.advisorCommittee Chair: Altunbasak, Yucel; Committee Co-Chair: Zhou, G. Tong; Committee Member: Al-Regib, Ghassan; Committee Member: Kenney, James Stevenson; Committee Member: Ma, Xiaoli; Committee Member: Pan, Ronghuaen_US


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