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1、DOHLERLAYOUT3/22/1111:16AMPage159ACCEPTEDFROMOPENCALLIsthePHYLayerDead?MischaDohler,CTTCRobertW.HeathJr.,TheUniversityofTexasatAustinAngelLozano,UPFConstantinosB.Papadias,AITReinaldoA.Valenzuela,BellLabsABSTRACTa1971workshoponcodingtheory,NedWeldonfamouslydeclared:“codingisdead
2、”[2].Inhind-Thisarticleoriginatesfromapanelwiththesight,ofcourse,codingwasnotdead,andanum-abovetitle,heldatIEEEVTCSpring2009,inberofbreakthroughswerestilltocome.whichtheauthorstookpart.TheenthusiasticTheaimofthisarticleistodiagnosethecon-responseitreceivedpromptedustodiscussfor
3、aditionofPHYresearchtoday.ThismayprovewideraudiencewhetherresearchatthephysicalusefulinfuturedecisionsrelatedtoR&Dwithinlayer(PHY)isstillrelevanttothefieldofwire-thePHYandhopefullypositivelyinfluencepoli-lesscommunications.Usingcellularsystemsascymakersdecidingoninternationalan
4、dnationaltheaxisofourexposition,weexemplifyareasprojectgrants,companies’researchdirections,wherePHYresearchhasindeedhitaperfor-amongothers.mancewallandwhereanyimprovementsareToframethediscussion,itishealthytopro-expectedtobemarginal.WethendiscusswhethervideadefinitionofthePHYto
5、ensureacom-theresearchdirectionstakeninthepasthavemonunderstanding.Havingitsoriginsinwirelinealwaysbeentherightchoiceandhowlessonssystems,theOpenSystemsInterconnectionlearnedcouldinfluencefuturepolicydecisions.(OSI)modelformallyattributestothePHYtheSeveraloftheraisedissuesaresu
6、bsequentlydis-transmissionofbitsoveradedicatedlinkwithcussedingreaterdetails,e.g.,thegrowingdiver-theaidofbasebandandradiofrequency(RF)gencebetweenacademiaandindustry.Withthisprocessingatthetransmittingandreceivingargumentationathand,weidentifyareasthatareends.Inwirelesssystems
7、,however,linksarenoteitherunder-developedorlikelytobeofimpactcleanlydefinedinisolationbecauseofthenatureincomingyears—hencecorroboratingtherele-oftheradiomediumandtheinevitableinter-linkvanceandimportanceofPHYresearch.interactions.Withinthewirelesscommunity,webelievethePHYdefin
8、itionshouldbeformallyIbroadenedtoconcernthetransmissio
