Directional AF Cooperative Communication System Based on Outage Probability

In order to improve outage property of cooperative communication system, directional antenna technologycouldbeintroduced.ThepaperproposessinglerelayAFcooperativecommunication protocolbasedondirectionalantennaanddeducestheoutageprobabilityofsysteminfullydirectional modetheoreticallysoastodeducethelowerbound.Withtheminimumsystemoutageprobabilityto bethetarget,thepaperanalyzesOPA(OptimumPowerAllocation)andmakesdetailedanalysisand comparisonofthesystempropertyoftheestablishedmodelbycombiningwithspecificsimulation value.ThesimulationresultshowsthatontheconditionofhighSNR(SignaltoNoiseRatio)orgreater differenceofchannelcoefficientbetweentwoterminalsandrelay, the lowerboundandaccurate value are approximated and the outage property of fully directional cooperative communication issuperiortothatoftraditionalmode.Underthesituationoflimitedpower,OPAcanenhancethe outagepropertyofsystemeffectively. KeywORDS Amplify and Forward, Cooperative Communication, Directional Antenna, Outage Probability

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