标签: communica

MulticarrierTechniquesfor4GMobileCommunications,ShinsukeHara&RamjeePrasad,ArtechHouse

DigitalModulationinCommunicaAgilentDigitalModulationinCommunicationsSystems―AnIntroductionApplicationNote1298IntroductionThisapplicationnoteintroducestheconceptsofdigitalmodulationusedinmanycommunicationssystemstoday.Emphasisisplacedonexplainingthetradeoffsthataremadetooptimizeefficienciesinsystemdesign.Mostcommunicationssystemsfallintooneofthreecategories:bandwidthefficient,powerefficient,orcostefficient.Bandwidthefficiencydescribestheabilityofamodulationschemetoaccommodatedatawithinalimitedbandwidth.Powerefficiencydescribestheabilityofthesystemtoreliablysendinformationatthelowestpracticalpowerlevel.Inmostsystems,thereisahighpriorityonbandwidthefficiency.Theparametertobeoptimizeddependsonthedemandsoft……