超宽带无线通信系统中关键技术的应用研究

烟台大学文经学院毕业论文（设计）[摘要]超宽带（UWB）无线通信技术是一种新型的无线通信技术，它采用脉冲调制，具有通信容量高、抗多径能力强、辐射功率密度低和低功耗低成本的特点。目前，蓝牙技术是在短距离无线接入方面应用的主流技术，但是其所能提供的传输速率远远不能达到不断发展的多媒体业务的需求。而UWB技术可以在10米的范围内提供100Mbit/s至1Gbit/S的传输速率，并且可以与现有的窄带系统很好的共存，因此，UWB技术是目前在短距传输上最具开发潜力的技术之一，这项新型的技术对现有的无线通信技术是一个有力的补充。本文对超宽带无线通信系统涉及到的基本概念及原理进行了介绍，对其中的UWB脉冲成型技术、调制技术和多址技术等关键技术进行了理论研究。[关键词]超宽带；信道容量；脉冲调制；跳时烟台大学文经学院毕业论文（设计）Abstract：Ultra-wideband(UWB)wirelesscommunicationtechnology,anewtypeone,whichadoptsthepulsemodulation,ischaracterizedbyhighcommunicationcapacity,stronganti-multipathcapability,lowradiationpowerdensity,lowpowerconsumptionandlowcost.Atpresent,theBluetoothtechnologyisthemainstreamtechnologyintermsofshortdistancewirelessaccessapplication,butthetransmissionrateitcanprovidecannotmeettheneedsofthecontinuouslydevelopingmultimediabusiness.WhilefortheUWBtechnology,itstransmissionratecanreach100Mbit/sto1Gbit/sintherangeof10meters,anditcancoexistwiththeexistingnarrowbandsystemverywell.Therefore,UWBtechnologyiscurrentlyoneofthemostpromisingtechnologiesinthefieldofshortdistancetransmission,andthisnewtechnologyisapowerfulsupplementtotheexistingwirelesscommunicationtechnology.Thispaperintroducesthebasicconceptandprincipleinvolvedintheultra-widebandwirelesscommunicationsystem.Inaddition,theauthorcarriesonatheoreticalresearchonthekeytechnologies,suchastheUWBpulseshapingtechnology,modulationtechnologyandmultipleaccesstechnology.Keywords:Ultra-wideband,Channelcapacity,Pulsemodulation,Timehopping烟台大学文经学院毕业论文（设计）目录1绪论.................................................................................................................................11.1本课题的研究意义...................................................................................................11.2超宽带无线通信系统的特点...................................................................................11.3UWB发展背景.........................................................................................................31.4国内外研究现状.......................................................................................................41.5UWB技术的应用.....................................................................................................52UWB通信系统概述.........................................................................................................72.1UWB通信系统定义.................................................................................................72.2UWB通信系统基本原理.........................................................................................72.3UWB与其它无线通信技术的比较.........................................................................82.3.1IEEE802.11a与UWB...................................................................................92.3.2蓝牙(Bluetooth)与UWB..............................................................................92.3.3HomeRF与UWB..........................................................................................92.4UWB通信的信号形式...........................................................................................102.4.1基带窄脉冲形式.........................................................................................102.4.2调制载波形式..............................................................................................103UWB脉冲成形技术.......................................................................................................123.1高斯单周脉冲........................................................................................................123.2载波调制成形技术................................................................................................133.3Hermite正交脉冲...................................................................................................133.4PSWF正交脉冲.....................................................................................................134UWB调制及多址技术...................................................................................................144.1UWB调制技术.......................................................................................................144.1.1脉位调制.....................................................................................................144.1.2脉幅调制.....................................................................................................154.1.3二相调制.....................................................................................................154.1.4波形调制.....................................................................................................164.1.5正交多载波调制..........................................................................................164.2UWB多址技术.......................................................................................................164.2.1跳时多址......................................................................................................164.2.2直扩-码分多址.............................................................................................174.2.3跳频多址......................................................................................................