›› 2015, Vol. 35 ›› Issue (6): 75-.doi: 10.3780/j.issn.1000-758X.2015.06.009

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AnOnlineIndividualChannelInterrelationMethodStudyofAntennaArrayCalibration

 LIU  Han-Chao, LIANG  Hao   

  1. (1BeijingSpaceInformationRelayandTransmissionTechnologyResearchCenter, Beijing100094)〖JP〗
    (2StateKeyLaboratoryofParticleDetectionandElectronics (IHEPUSTC), UniversityofScienceandTechnologyofChina, Hefei230026)
  • Received:2015-03-27 Revised:2015-07-17 Online:2015-12-25 Published:2015-12-25

Abstract: Duetotheclockfrequencydifferencebetweenthetransmitterandthereceiver, itisdifficultforthemultiantennasatellitemobilecommunicationchannelcalibrationinlowsignalnoiseratiol(SNR). Anonlineindividualchannelmulticycleinteraccumulationmethodwasproposed, whichcouldsolvethedifficultyofchannelcalibrationinlowSNR.Thiscalibrationspreadspectrumsignalwasproducedfromgroundcalibrationstation, whichcouldreducethecomplexityofsatellitedesignandrealizeonlinecalibrationwithoutinterruptingthecommunicationforusers. Thismethodsolvestheproblemofcodeoffsetandfrequencyoffsetthroughmarkingthevaliddata, matchingrate,andsoon. TheresultsshowthattheSNRis-30dBunderthespreadingradioof1023,whichis 03dBworsethanthatofthetheorySNR. Thestudycanprovidetechnicalsupportforthemultiantennasatellitemobilecommunication.

Key words: Array signal, Calibration, Frequency offset, PN code offset, Multicycle accumulation