导航接收机时频域干扰抑制技术研究及实现

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1、电子科技大学硕士学位论文导航接收机时频域干扰抑制技术研究及实现姓名：王长生申请学位级别：硕士专业：信号与信息处理指导教师：吕明20090501AbstractSatellitenavigationandpositioningtechnology,whetherinthemilitary,orcommercialapplicationsisofgreatvalue．NavigationandpositioningsatellitesystemCansendhigh．precisionpositioningandtimingi

2、nformationinall-dayandall-weather．TheinformationisaavailabletoallmilitaryandcivilianUSerS．Whoownsthetechnology,whowilloccupyadvantageonthemilitary,diplomaticandeconomic·Therefore，allcountrieswanttoobtainmoreaccuratesatellitenavigationinformationandpreventtheothera

3、ccessingthesatellitenavigationinformation．Followingthis，moreandmorepeopleresearchthesatellitenavigationsystemtechnologyandanti—interferencetechnology．hlthispaper,satellitenavigationsystemtechnologyandanti．interferencetechnologyarediscusseddeeply．Thekeyworkofthepap

4、erisincluded弱fallow：1．Analysisthecharacteristicsofnavigationreceiverandthecharacteristicsofinterferencesignal．Setupmemodeloftheinterferencesignals．BaSedonthemodel，discusstheanti．．interferenceabilityofsatellitenavigationsystems．Throughthecomputersimulation,wegetthe

5、biterrorrateofsatellitenavigationsystemintheinterferenceenvironment．2．Studyfrequencydomainnarrowbandinterferencesuppressiontechnologyfornavigationreceiveranddiscussehowtoselecttheparametersofit．UsingtheadaptivethresholdfilteringalgorithmandfrequencydomainLMSfilter

6、ingalgorithmtosuppressthenarrowbandinterferenceandfoundsomedisadvantagewithit．BaSedonthenarrow．bandinterferencecharacteristics，thispaperusespartupdateweightsLMSalgorithmtosuppressnarrowbandinterference．AlotofsimulationWaSdonetocertifythatthealgorithmCanworkw-rywel

7、l．3．Studybroadbandinterferencesuppressiontechnologyfornavigationreceiver．BecausebroadbandinterferencesignalCannotbedistinguishedbetweeninterferenceandsignalsinthefrequencydomain,atime—frequencymethodwasusedtosuppresstheinterference．BaSedonthat,frequency—shiftfilte

8、rwasdesignedtosuppressbroadbandinterferencefornavigationreceiver．ThroughthesimulationanalysiswecertifythattheIlAbstractfrequency-shiftfiltercallsuppress