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Journal of University of Chinese Academy of Sciences ›› 2008, Vol. 25 ›› Issue (2): 238-243.DOI: 10.7523/j.issn.2095-6134.2008.2.015

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Implementationoftimingandcarrierphaserecoveryin alldigitalreceiversbasedonDSPBuilder

CHENShu, LIUQiJia, LIUChang Qing, ZHAOKeMing   

  1. 1ChinaRemoteSensingSatelliteGroundStation,ChineseAcademyofSciences,Beijing100086,China; 2GraduateUniversity,ChineseAcademyofSciences,Beijing100049,China; 3DepartmentofElectronicEngineering,TsinghuaUniversity,Beijing100084,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-03-15

Abstract: in this paper, thedesign and implementation ofthesynchronization algorithmsin alldigitalcommunicationreceiversareintroduced.ThefixedpointtimingrecoveryalgorithmbasedontheGardnerfeedbackloopapproachandthecarrierrecoveryalgorithmusingdigitalCostaslooparerealizedviaAlteraDSPBuilder.BoththecomputersimulationandtheFPGArealizationdemonstratethevalidityofthealgorithms.ResultsshowthattherealizedsystemhasgoodperformancewiththeSNRdegradationlessthan15dB,theacquisitionrangesoftimingrecoveryandcarrierrecoverylargerthan±1% and±4%,respectively.

Key words: Gardneralgorithm, digitalCostasloop, DSPBuilder

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