Transcription of Phase-shift keying (PSK) Input Decision Output …
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Phase-shift keying (PSK) Input Decision Output …
Phase-shiftkeying (PSK) BothOOKandFSKweres howntoresultina probabilityoferrorofp DerfcsEb ;whereEbis s discussionofwhy OOKandFSKdon t binaryphase-shiftkeyed(BPSK) !ct/;where!cis thecarrierfrequency, a polarbinarybasebandsignaltakingonthevalu e1 fora markand 1 fora differentsignals,andthey differonlybya changeofsign,thissignallingschemeis alsocalledphase-reversalkeying(PRK). !1t/;0<t T; Acos.!1t/;0<t T:Whenthebasebandsignalconsistsofsquarep ulseswithamplitudetakingonvaluesofC1 and 1 withequalprobability, it fc/ fc/ 2C14 2:HerethedatarateisRD1= essentiallythesameasthePSDobtainedbyassu minga deterministicalternatingsquarewave takingonvaluesofC1 and 1 insequence,whichcanbeconsidereda ,thereis noneedtohave two presentat theinput,and theoutputofthefilterisE =2,sotheoverallprobabilityoferroratthere ceiverisP Derfc 2 EpE =2 Derfcs2E :Sincethesignalshave thesameenergywhena zeroanda onearetransmitted,thiscanbewrittenasP Derfcs2Eb :Forthesamecommunicationchannel, , thereis a coherentreferenceforsynchronousdetection cannotbeobtainedbytheuseofanordinaryphas e-lockedtrackingloop,sincetherearenospec trallinecomponentsat fc.
Phase-shift keying (PSK) Both OOK and FSK were shown to result in a probability of error of p D erfc s Eb where Eb is the average energy per bit. Stremler’s discussion of why OOK and FSK don’t perform.
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