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ID:51985158
大小:18.72 MB
页数:102页
时间:2020-03-21
《基于RFID的快速识别系统研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、中文摘要iiiiii置ii置盲i审宣i薯iiiiiiii置毒iiii宣iiiiii宣置置ii宣iIiri宣ii萱中又捅要射频识别技术(RF]D,RadioFrequeneyIdentifieation)是一种利用射频信号进行通信的自动识别技术。由于其具有非接触、抗干扰能力强等优点,得到了广泛的应用,并且发展迅猛。随着社会的发展,高速移动环境下对RFID技术的需求越来越强烈。所以基于RFID的快速识别系统中的两项关键技术:多普勒频移的快速跟踪和多标签的防碰撞算法成为目前RFID领域的研究热点。针对高速移动环境中多普勒频移问题,本文采用了科斯塔斯环载波同步法来实现载波的快速跟踪。并利用M
2、ATLAB和QuartuslI软件进行了仿真和测试。验证了科斯塔斯环系统设计方案的正确性和可实现性,具有较好的工程应用价值。针对标签的碰撞问题,在本文中,阐述了一种快速高效的RFID系统防碰撞算法一跳跃式二进制树形算法的工作原理,并完成了算法的设计和FPGA仿真。理论及实验数据证明,本算法在效率稳定性和识别速度方面均达到了预期的要求。关键词:射频识别;多普勒频移;载波同步;防碰撞;二进制树形黑龙江大学硕士学位论文AbstractRFID(RadioFrequencyIdentification)isanautomaticidentificationtechnologyusingrad
3、iofrequencysignalstocommunicate.Becauseofitsadvantagessuchasnon—touching,anti—interferenceabilityandSOon,ithasbeenwidelyapplied,andalsocarldevelopveryfast.Withthedevelopmentofsociety,I强Dtechnologywillbeusedinfast—movingenvironment.ThetWOkeytechnologiesoftheDopplerfrequencyshiftfasttrackandmulti
4、-·taganti-·collisionalgorithmsinthefastrecognitionsystembasedonRFIDarethehonestpointsinRFIDresearch.Intheenvironmentofhi曲一speedmobileDopplershiftinfrequency,thisarticlehasbeenthecostascarriersynchronizationlawtoachievethefasttrackcarrier.Afterwards,thepaperhascarriedonthemodelingandsimulationto
5、thecarriersynchronizationloopusingtheMATLABsimulationt001.AndwehavewrittenVerilogHDLcodeusingQuartuslldevelopmentso.aretorealizetheFPGAimplementationofRFIDtransmitterandreceiver.Thusithasverifiedthecorrectnessandthereliabilityofthesystem.Ithasagoodvalueofengineeringapplication.Inthispaper,first
6、lyresearchtheanti—collisionalgorithmhasbeenfocusedon.Ahighperformanceanti·collisionalgorithm,jumpingbinarytree—likeanti—collisionalgorithm,wasdesignedusingVerilogHDLandWassimulatedwithFPGAaswell.Theoreticanalysisandsimulationresultshaveprovedthattheefficiencyandthespeedofthisanti-collisionalgor
7、ithmarewell.Keywords:RFID,Doppler,Carriersynchronization,Anti-collision,Binarytree—11.目录目录中文摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯IAbstract.⋯⋯⋯.....⋯.....⋯.⋯.⋯...............⋯..⋯....⋯..⋯.....⋯⋯.⋯⋯⋯..⋯⋯.⋯.⋯⋯⋯..⋯⋯.II第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
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