Antenna Packing in Low Power Systems: Communication Limits and Array Design

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dc.citation.bibtexNamearticleen_US
dc.citation.journalTitleIEEE Transactions on Information Theoryen_US
dc.contributor.authorMuharemovic, Tariken_US
dc.contributor.authorSabharwal, Ashutoshen_US
dc.contributor.authorAazhang, Behnaamen_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.date.accessioned2007-10-31T00:53:54Zen_US
dc.date.available2007-10-31T00:53:54Zen_US
dc.date.issued2008en_US
dc.date.modified2005-06-25en_US
dc.date.submitted2005-06-24en_US
dc.descriptionJournal Paperen_US
dc.description.abstractIn this paper, we study design of transceiver antenna arrays and its impact on spectral efficiency of low-power systems. Our primary motivation is construction of practical and portable multi-antenna configurations with a very small and a-priori fixed volume for placing antennas. Using spectral efficiency as a target metric for array optimization, we show that any array configuration, transmit or receive, can be characterized via a parameter that we interpret as "effective degrees of freedom." For any array configuration, effective degrees of freedom describes an equivalent uncorrelated array, which results in the same low-power behavior of spectral efficiency. Joint optimization of transmit and receive antenna configurations decouples into maximizing effective degrees of freedom for transmitter and receiver separately. To achieve this goal, we introduce and study a theoretical benchmark of "limiting degrees of freedom," which is the least upper bound on effective degrees of freedom, evaluated over all configurations with finite number of antennas. Limiting degrees of freedom therefore describes the best possible performance for any transceiver array which confines its elements inside a given space. We compute a closed-form expression for limiting degrees of freedom of a circular geometry. Finally, we present numerical procedure and examples for designing linear and square arrays with non-uniform spacing, which typically exhibit significant spectral efficiency gains over uniform arrays.en_US
dc.identifier.citationT. Muharemovic, A. Sabharwal and B. Aazhang, "Antenna Packing in Low Power Systems: Communication Limits and Array Design," <i>IEEE Transactions on Information Theory,</i> 2008.en_US
dc.identifier.doihttp://dx.doi.org/10.1109/TIT.2007.911175en_US
dc.identifier.urihttps://hdl.handle.net/1911/20109en_US
dc.language.isoengen_US
dc.subjectMIMOen_US
dc.subjectMultiantennaen_US
dc.subjectDegrees of Freedomen_US
dc.subject.keywordMIMOen_US
dc.subject.keywordMultiantennaen_US
dc.subject.keywordDegrees of Freedomen_US
dc.titleAntenna Packing in Low Power Systems: Communication Limits and Array Designen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
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