卫星导航抗干扰最优接收机与相关接收机性能分析

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1、卫星导航抗干扰最优接收机与相关接收机性能分析李峥嵘，陈华明，王飞雪（国防科学技术大学电子科学与丁.程学院，湖南长沙410073）摘要：干扰抑制问题-•直是全球导航卫星系统（GNSS）热点问题之一，如何同时兼顾干扰抑制与信号接收一K是研宄的焦点。在敁大信干噪比（MSINR）准则下，深入研允了存在部分频带干扰时单天线卫ffl导航抗干扰ii优接收机的性能，并详细分析了其频域响应、信干噪比损耗和匹配输出函数。为减小抗干扰接收机硬件实现难度，深入研究了单天线卫星导航抗干扰相关接收机的性能，并详细分析了其频域响应、信干噪比损耗和相关输出函数。分析表明，抗干扰W优接收

2、机与相关接收机信干噪比损耗随着干扰带宽和干扰强度的增加而增大，随干扰频率与中心频率偏差和噪声带宽增加而减小。此外，干扰将引起抗T•扰接收机匹配与相关输出主峰降低和旁瓣抬高，从而影响接收机捕获、跟踪和多径抑制性能。研究结果将为卫星导航抗干扰接收机的优化设计提供依据。关键词：全球导航卫星系统（GNSS）;部分频带干扰；抗干扰扱优接收机；抗干扰相关接收机中图分类号：TN967.1文献标志码：A文章编号：PerformanceAnalysisofGlobalNavigationSatelliteSystemAnti-jammingOptimalReceivers

3、andCorrelationReceiversLIZhengrong,CHENHuaming,WANGFeixue(CollegeofElectronicScienceandEngineering,NationalUniversityofDefenseTechnology,Changsha410073，China)Abstract:InterferesuppressionisoneofthehotspotonGlobalNavigationSatelliteSystem(GNSS).Itisthefocushowtheperformanceofinter

4、feresuppressionandsignalreceptioncanbesimultaneouslyimprovedinanti-jammingreceivers.ThesoleantennaGNSSanti-jammingoptimalreceiversarelucubratedonbasisofthemaximalsignal-to-interference-noiseratio(MSINR)norminpartial-bandinterferencescircumvent.Theirsfrequencyresponses，SINRlossesa

5、ndmatchoutputfunctionsareanalyzedindetail.TheGNSSsoleantennaanti-jammingcorrelationreceivers,whichareusedtoreducethehardwarerealizationdifficulty，arealsostudiedinpartial-bandinterferencescircumvent.Theirsfrequencyresponses，SINRlossesandcorrelationoutputfunctionsarcpresent.Itissho

6、wedthattheSINRlossesofanti-jammingoptimalreceiversandcorrelationreceiverswillincreasewiththebandwidthandpowerincreaseofinterferences.TheSINRlosseswilldecreasewiththebandwidthincreaseofnoiseand(hefrequencydifferenceincreasebetweeninterferencesandsignals.Moreover,itisshowedthatthem

7、atchandcorrelationoutputmainlobeswillbedepressedandthesidelobeswillberaisedbyjammers.Asaresult，theacquisition，trackandmultipathmitigationperformanceofanti-jammingreceiverswillbeaffected.TheanalysisresultswillprovidethedesignbasisfortheGNSSanti-jammingreceivers.Keywords:GlobalNavi

8、gationSatelliteSystem(GNSS);partial-band