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dc.contributor.authorAhmed, Nasir
dc.creatorAhmed, Nasir
dc.date.accessioned 2007-10-31T00:33:35Z
dc.date.available 2007-10-31T00:33:35Z
dc.date.issued 2002-04-20
dc.date.submitted 2002-04-25
dc.identifier.urihttp://hdl.handle.net/1911/19660
dc.description Masters Thesis
dc.description.abstract In this work, we are concerned with power efficient communication techniques for wireless mobile devices. In this direction the effects of nonlinear amplifiers in communications systems are first studied, as they tend to consume a large fraction of available battery power. Next, a new information theoretic upper bound is proposed that takes into account power efficiency, and the bound achieving input distributions are analyzed and shown to be strikingly different that those that achieve channel capacity. Next, in order to examine methods to achieve the power efficient input distributions, results on shaping gains are restated, with particular emphasis on non-equiprobable signalign in two dimensions. With slight changes in classical techniques we are able to achieve power efficient signaling schemes that reduce the wasted power from RF amplification. Finally, simulation results are shown to verify the savings in wasted energy obtained through the use of these power efficient signalign schemes.
dc.language.iso eng
dc.subjectPower Amplifiers
Shaping
Non-equiprobable signaling
dc.title Power Issues in Communication Systems
dc.type Thesis
dc.citation.bibtexName mastersthesis
dc.citation.journalTitle Masters Thesis
dc.date.modified 2003-07-12
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)
dc.subject.keywordPower Amplifiers
Shaping
Non-equiprobable signaling
thesis.degree.level Masters
dc.type.dcmi Text
dc.identifier.citation N. Ahmed, "Power Issues in Communication Systems," Masters Thesis, 2002.


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  • ECE Publications [1055]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students

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