摘要
Themodeswitchingbetweenspatialmultiplexing(SM)andspace-timeblockcode(STBC)diversityisinvestigatedforthemultiple-inputmultiple-output(MIMO)automaticrepeatrequest(ARQ)system.Fiveimportantpracticalfactorsareconsideredintheproposedswitchingscheme:transmitcorrelation,ARQtechnique,packetlossprobability(PLP)constraint,discreteratetransmission(DRT)andchannelcoding.Underthespatiallycorrelatedchannel,thedistributionsofthepostsignal-to-interference-plusnoiseratio(SINR)fortheSMmodeandtheSTBCmodeareobtainedbyusingGammaapproximations.Thenthispaperderivestheclosed-formexpressionsofthePLPandthethroughputfordifferentmodeswhentheARQtechniqueisemployed,basedonwhichthemodeswitchingalgorithmisproposedtoimprovethespectralefficency.Inthesimulation,thecorrectionoftheexpressionsisfirstverified.Then,thesignificantgainobservedbytheproposedalgorithmispresented.Sincetheswitchingpointisthekeyparametertoimplementthemodeswitching,thispaperalsoshowshowtheswitchingpointisaffectedbythepracticalfactorsconsidered.
出版日期
2013年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
