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1、直接序列扩频通信（dsss）ThisarticleiscontributedbyxuyaosongPdfdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyoufirstselectTXT,ordownloadthesourcefiletothelocalview.2005issuenumberfourth:1001-893X(2005)-0128-0403ThematicreviewSUMMARIZATIONAc
2、curatemeasurementmethodofPNcodephaseindirectsequencespreadspectrumcommunicationsystemHuXiulin,ZhangJun,YangLing*(Departmentoftelecommunication,HuazhongUniversityofScienceandTechnology,Hubei,Wuhan430074)pickThispaperpresentsamethodforaccuratelymeasuri
3、ngthephasedifferencebetweenthelocalPNcodeandtheinputPNcode,whichcombinesnumericalanalysisAlgorithmanddigitalsignalprocessingtechnology,andbymeansofthephaseunitoutputvaluehasahighmeasurementprecision,andthemethodforfulldigitalmethod,canuseFPGAandDSPpr
4、ocessingchipconveniently.Theresultsofcomputersimulationaregiven,andtheaccuracyandnoiseimmunityofthismethodareanalyzedbysimulationresults.Thismethodisofgreatvalueinpseudocoderanging,highprecisionPNcodeacquisitionandtracking,differentialpositioning,and
5、soon.Keywords:spreadspectrumcommunication;codephase;PNleastsquaresmethod;graphclassificationnumber:TN914.42;documentidentifiercode:AA,Method,for,Accurately,Measuring,the,Phase,of,PN,Code,,in,DSSS,SystemsHU,Xiu-Lin,ZHANG,Jun,YANG,Ling(HuazhongUniversi
6、tyofScienceandTechnology,Wuhan430074,ChinaAbstract:methodaccuratelymeasuringthe)forphaseerrorbetweenthelocalPNcodeandthereceivedAPNcodeisstudied.ThismethodisacombinationofnumericalanalysisalgorithmandDSPtechnology.Itanalysestheoutputofphaseerrorunitt
7、ogainhigh-accuracy.Besides,itisaalldigitalmethodwhichcanberealizedconveniently.Theaccuracyandtheantiperformanceofthemethod-noiseareanalyzedbasedontheresultofcomputersimulation.Thismethodisofgreatvalueinthefieldsofpseudorandomranginghighpseudorandomac
8、quisitionand-accuracytracking,differentialorientationandsoon.Keywords:SpectrumspreadcommunicationPhase,of,PN,code,Least,squares,method,thisphasedifferencecannotbemeasureddirectlyandaccuratelybynumericalmethods.However,insomeapplications,suchassatelli
