Cooperative Communications in the Fading Channel

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dc.citation.bibtexNameinproceedingsen_US
dc.citation.conferenceNameSPIE Conference on Noise in Communication Systemsen_US
dc.contributor.authorAhmed, Nasiren_US
dc.contributor.authorAazhang, Behnaamen_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.date.accessioned2007-10-31T00:34:19Zen_US
dc.date.available2007-10-31T00:34:19Zen_US
dc.date.issued2005-03-01en_US
dc.date.modified2005-03-26en_US
dc.date.note2005-03-24en_US
dc.date.submitted2005-03-01en_US
dc.descriptionConference Paperen_US
dc.description.abstractCooperative coding is a communication paradigm that pools distributed resources of different nodes in a network, such that the nodes act like a collaborative system instead of greedy adversarial participants. Cooperation has shown promise in increasing throughput and providing better power efficiency in wireless networks. In this work, we consider a basic example of cooperative communication, relay coding, and consider methods to improve the power efficiency by employing feedback and using power control. We consider power control policies based on the degree of transmitter channel knowledge. First, when perfect feedback is available, we show results for the optimal power control policy for any network code. We show that by using the decode and forward relaying protocol, in some cases it is possible to approach the universal lower bound on the outage probability for the block fading relay channel. Second, when a finite rate of feedback is available, we see that only a few feedback bits are necessary to achieve most of the gains that the perfect feedback policy has over constant power transmission. Based on these results, it is evident that future network protocols should utilize feedback in order to fully exploit the potential gains of network coding.en_US
dc.identifier.citationN. Ahmed and B. Aazhang, "Cooperative Communications in the Fading Channel," 2005.en_US
dc.identifier.urihttps://hdl.handle.net/1911/19674en_US
dc.language.isoengen_US
dc.subjectCooperative Communicationsen_US
dc.subjectRelay Channelen_US
dc.subjectPower Controlen_US
dc.subjectLimited Feedbacken_US
dc.subject.keywordCooperative Communicationsen_US
dc.subject.keywordRelay Channelen_US
dc.subject.keywordPower Controlen_US
dc.subject.keywordLimited Feedbacken_US
dc.titleCooperative Communications in the Fading Channelen_US
dc.typeConference paperen_US
dc.type.dcmiTexten_US
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