超长PN码的延迟-等待直接捕获方法-豆柴文库

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超长PN码的延迟-等待直接捕获方法
Introduction:
Withtherapidadvancementincommunicationtechnologies,thedemandsforhigh-speeddatatransferhaveincreaseddrastically.Thisgrowthincommunicationtechnologieshasledtothedevelopmentofdifferenttechniquesandmethodsforcommunicationunderdifferentcircumstances.However,mostwirelesscommunicationmethodsrequireasignaltobetransmittedtoareceiver,actingasanecessaryprerequisiteforfurthercommunication.Forsituationswheretheavailabilityofasignalisnotassured,suchasinmilitaryoperationsorremoteandharshenvironments,adirectcapturemethodcanbeused.Inthispaper,wewilllookatthedirectcapturemethodthatusesalongPNcodeforsynchronizationanditsdelay-waitingapproach.
DirectCaptureMethod:
Thedirectcapturemethodisatechniqueusedtodetectsignalswithouttheirdetectionatacentrallocationorbasestation.Instead,itcollectsandanalysestransmittedsignalsinareceiverindirectproximitytothetransmittingantenna.Thismethodeliminatesthedelayoftransmittingasignaldirectlytoacentrallocationbeforeprocessingandanalysingitforfurthercommunication.Thisprocessallowsforthecollectionandanalysisofsignalsinreal-time,withoutdelays.Thedirectcapturemethodismainlyusedwhensignalscannotbetransmittedtoacentrallocationduetochallengingenvironments,compromisedsecurityordistance.
LongPNCodeSynchronization:
Physicallayersynchronizationhasavitalroletoplayinensuringefficientcommunicationinwirelesscommunicationsystems.ThelongPNcodesynchronizationmethodisoneapproachusedtoachievesynchronizationandallowforthedecodingoftheincomingsignal.Thecodescanbeusedasuniquefingerprintstoidentifythedifferenttransmittingsources.Differentiatingthesesourcesoftransmissionenablesthereceivertolockontothecorrectfrequency,phase,andtiming,whichisnecessaryfordemodulationanddecoding.
ThePNCodeisasequenceof1sand0sthatcanbegeneratedbyafour-registerlinearshiftregistersequence(LFSR).ThegenerationofaPNcodeisbasedonaparticularpolynomial,whichdeterminestheconfigurationoftheLFSR.ThePNcode'slengthandrangedeterminethedurationofthecorrelationprocessandthedetector'sab