ISSN1006-7167CN31-1707/TRESEARCHANDEXPLORATIONINLABORATORY第42卷第1期Vol.42No.12023年1月Jan.2023DOI:10.19927/j.cnki.syyt.2023.01.038卫星接收信号的同步设计性实验开发与教学实践周冬跃,刘汉瑞,陈丽,温坤华,林福民,杨伯文(广东工业大学物理与光电工程学院,广州510006)摘要:为了提升本科生创新实践能力,开发了一个设计性实验项目———卫星接收信号的同步。该教学实验包括基带信号同步技术验证的方案设计、现场可编程门阵列(FPGA)的实现及系统测试。实验对信号进行采样处理;利用快速傅里叶变换(FFT)进行载波的粗同步;将信号的频点牵引到同相正交环(Costas环)的捕捉范围中,通过Costas环进行精细同步;采用超前滞后位同步技术的方法,实现码元同步;并对星基信号检测。教学实践表明,这种渐进式的设计性实验教学方式,可以激发学生的实验兴趣和创新意识,增强学生解决工程问题的能力,从而提高实验教学质量。关键词:卫星接收信号;同步;同相正交环;设计性实验;创新能力中图分类号:TN929.11文献标志码:A文章编号:1006-7167(2023)01-0195-06DesigningExperimentDevelopmentandPracticeofSynchronizationofSatelliteReceivedSignalsZHOUDongyue,LIUHanrui,CHENLi,WENKunhua,LINFumin,YANGBowen(SchoolofPhysicsandOptoelectronicEngineering,GuangdongUniversityofTechnology,Guangzhou510006,China)Abstract:Inordertoimprovetheinnovationandpracticeabilityoftheundergraduate,adesigningexperimentofsynchronizationofreceivedsatellitesignalsisdeveloped.Theexperimentincludestheschemedesignofbasebandsignalsynchronization,therealizationofFPGAandthesystemtests.Intheexperiment,thesignalisdown-sampledfirst.Thenperformcarriersynchronization.ItusesFFT(FastFourierTransformation)toperformcoarsesynchronizationofthecarrier,andpullsthefrequencypointsofthesignalintothecapturerangeoftheCostasring(in-phasequadraturering),andthenletstheCostasringperformfinesynchronization.Thenextstepisthesymbolsynchronization,whichadoptsthemethodofleadingandlaggingbitsynchronizationtechnology.Finally,theexperimentalsystemistestedtodetectsatellite-basedsignals.Teachingpracticehasprovedthatthisteachingmethodofsyntheticanddesigningexperimentcanstimulatestuden...