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ACarrierSynchronizationAlgorithmforAutonomousRadioReceiverinDeepSpace

DOI: 10.11728/cjss2015.03.343, PP. 343-349

Keywords: Deepspacecommunication,Autonomousradio,Carriersynchronization,Detectionstrategy,Detectionprobability

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Abstract:

Thecarriersynchronizationalgorithmoftheautonomousradiofordeepspaceisstudied.Whenthesignalmodulationisunknown,thispaperimprovestheexistinguniversalcarriersynchronizationloopformultiplemodulations,expandsthefrequencytrackingrangeoftheloop,proposesaTongdetection-basedM-aryPhaseShiftKeying(M-PSK)signallockingdetectionalgorithmtorapidlyandeffectivelydeterminewhetherthecurrentphasediscriminationmodematchesthemodulationmode,soastoindependentlychoosewhethertoswitchthephasediscriminationmode.Throughtheoreticalanalysisandcomparison,itisdescribedthatthetotaldetectionprobabilityofthealgorithmproposedinthispaperissignificantlyhigherthantheprobabilityofsinglelockdetection.Simulationresultsshowthatthealgorithmhashighdetectionprobabilityandlowcomputationalcomplexityatalowsignaltonoiseratio.

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