无线扩展仪器关键技术研究

《无线扩展仪器关键技术研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学博士学位论文无线扩展仪器关键技术研究姓名：孟劲松申请学位级别：博士专业：载运工具运用工程指导教师：林建辉20071001第ll页西南交通大学博士研究生学位论文定时与同步协议(WTSP)。在这个基础上，进一步研究了WXI的定时与同步，给出了基于最大传输延迟、最小传输延迟的两种触发同步方法，以及基于GPS秒脉冲和DDS、本地时钟与WTSP联合的两种采样时钟同步算法。针对野外分布式测试应用，给出了基于WXI的WSG—DTS的系统结构，以及嵌入式WTSP引擎的运行机制。关键词：无线集散型分布式测试系统；

2、无线扩展仪器；多载波宽带通信；无线总线；定时与同步西南交通大学博士研究生学位论文第lIl页AbstractThescienceandtechnologyisrapidlydevelopingeveryday，whichpushesthetesttheory，instrumentationandAutoTestSystem(ATS)toprogress．Today,thefieldremoteDistributedTestSystem(DTS)hasbeenwidelyappliedintestsofbrid

3、ge,railway,blasting，seismicexploration，andthelike，amongwhichtheWirelessScatter／GatherDistributedTestingSystem(WSG-DTS)isthebestATSfortheabove-mentioned．However,someweakness，suchaslowspeedofdatatrasmissionandlowprecisionofT&SareassociatedwithcurrentWSG-DTS，

4、sothestudyofkeytechnologyofWirelessextensionsforInstrumentwhichcanbepreferablyappledinthefieldremoteDistributedTestSystemissignificantforthedevelopmentofnationaleconomy．Thefollowingisthemaincontentandproductionofthestudy：1．Theinstrumentdevelopmenttreeispre

5、sentedbasingonthesum-upofallmodernkindsofgeneralinstrumentsandtestsystems，whichgivedirectionsforthestudyofnewgenerationinstrument．2．FortheproblemsOCUITintheexistingfieldremoteDTS，suchaslowspeedofdatatrasmissionandthelowprecisionofT&S，thispaperadvancesanide

6、aofWirelesseXtensionsforInstrument(WXI)basedonthedevelopmentlawofmodeminstumentationandthestudyofthemodeminstrumentkeytechnologies，WirelessBusandT&Sarethekeystones．3．TheresearchofIFdigital妇ioncommunicationsysytemtheoreticallyindicatesthatthesampleerrorises

7、sentiallyafactoroftheaccumulativecarriererror，whichsimplifiesthealgorithmofcarriersynchronization．AjointalgorithmofPilot·-symbol··aidedfrequencyandtimingsynchronizationwithconstantenvelopeandcontinuousphasemodulationOVertheRiceanchannel，isofferedhere，which

8、tellUSthatthepilot-symboltimingoffsetisstochastic，andlimitedtoSub·nanosecond．ThestudyofwirelessextensionscapabilityforinstrumentbasedonfixedOFDMinburstmodeshowesthatthebandwidthofOFDMisgreaterthanthecurrentSG