Feedback gain in Multiple Antenna Systems

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dc.citation.bibtexNamearticleen_US
dc.citation.journalTitleIEEE Transactions on Communicationsen_US
dc.contributor.authorBhashyam, Srikrishnaen_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.accessioned2007-10-31T00:37:15Zen_US
dc.date.available2007-10-31T00:37:15Zen_US
dc.date.issued2002-05-20en_US
dc.date.modified2003-11-09en_US
dc.date.submitted2001-10-12en_US
dc.descriptionJournal Paperen_US
dc.description.abstractMultiple antenna transmission and reception have been shown to significantly increase the achievable data rates of wireless systems. However, most of the existing analysis assumes perfect or no channel information at the receiver and transmitter. The performance gap between these extreme channel assumptions is large and most practical systems lie in between. Therefore, it is important to analyze multiple antenna systems in the presence of partial channel information. In this paper, we upper bound the outage probability performance of multiple antenna systems with preamble-based channel estimation and quantized feedback. We design causal feedback and power control schemes to minimize this upper bound on outage probability. We consider the following practical issues in our analysis and design: (i) the channel information is imperfect both at the receiver and at the transmitter, and (ii) part of the total available resources for the system need to be used for estimation and feedback. Our results demonstrate that for block fading channels, sending a periodic preamble and causally receiving channel state information via a feedback channel can lead to substantial gains in the outage performance over any non-feedback scheme. Most of the gains achieved by perfect feedback can be achieved by very few bits of feedback. Furthermore, it is demonstrated that these outage probability gains can be translated into improvements in frame error rate performance of systems using space-time codes. Thus, implementing a power control, even at the cost of reduced spectral resources for the forward channel is beneficial for block fading channels.en_US
dc.description.sponsorshipTexas Advanced Technology Programen_US
dc.description.sponsorshipNokiaen_US
dc.description.sponsorshipNational Science Foundationen_US
dc.identifier.citationS. Bhashyam, A. Sabharwal and B. Aazhang, "Feedback gain in Multiple Antenna Systems," <i>IEEE Transactions on Communications,</i> 2002.en_US
dc.identifier.doihttp://dx.doi.org/10.1109/TCOMM.2002.1006560en_US
dc.identifier.urihttps://hdl.handle.net/1911/19735en_US
dc.language.isoengen_US
dc.subjectmultiple antenna transmissionen_US
dc.subjectreceptionen_US
dc.subjectblock fading channelsen_US
dc.subjectspace-time codesen_US
dc.subject.keywordmultiple antenna transmissionen_US
dc.subject.keywordreceptionen_US
dc.subject.keywordblock fading channelsen_US
dc.subject.keywordspace-time codesen_US
dc.titleFeedback gain in Multiple Antenna Systemsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
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