《電子信息專業(yè)英語》課件 Lesson 11 Bluetooth

UnitFour■主要內(nèi)容：了解一些日常生活中常用的先進(jìn)電子技術(shù)、通信技術(shù)等，包括如藍(lán)牙技術(shù)，4G，5G等等?！鰧W(xué)習(xí)目標(biāo)：了解通信系統(tǒng)的基本知識，了解無線傳輸，有線傳輸?shù)幕驹?，以及他們各自在日常生活中的先進(jìn)通信設(shè)備中的應(yīng)用。■素質(zhì)目標(biāo)：引導(dǎo)自主思考，聚焦通信前沿，維護(hù)信息安全，樹立遠(yuǎn)大理想，激發(fā)使命榮譽(yù)；塑造良好人格，培養(yǎng)自覺遵守職業(yè)道德和規(guī)范。Lesson11BluetoothKeywords■Bluetooth藍(lán)牙■Destination目的地■Convenience方便■Technology技術(shù)■Exchange交換■Equipment設(shè)備■Standard標(biāo)準(zhǔn)■Frequency頻率■Bandwidth帶寬■Piconet微微網(wǎng)■Electronic電子的■Analogous相似的，相同的■Device設(shè)備■Application應(yīng)用■Interface接口■Radio射頻■Protocol協(xié)議■Spectrum譜■Infrastructure基礎(chǔ)設(shè)施■License許可證■Numerous許多的■Simultaneously同時■Pave鋪，鋪滿■Frequencyhopping頻率跳躍■工作任務(wù)：鼠標(biāo)、鍵盤、打印機(jī)、膝上型計算機(jī)、耳機(jī)和揚聲器等怎樣在PC環(huán)境中無線使用的？辦公室之間怎樣用無線網(wǎng)絡(luò)實現(xiàn)對話？■學(xué)習(xí)目標(biāo)：掌握藍(lán)牙技術(shù)的概念和技術(shù)特征■重點難點：藍(lán)牙技術(shù)的技術(shù)特征■推薦學(xué)時：6學(xué)時1：WhatisBluetoothTechnology?Bluetoothtechnologysupportsshortcommunication(within10meters).Itcanrealizethewirelessinformationexchangeamongthemobilephone,wirelessheadsetsandotherrelatedequipment.IEEE802.15isthetechnicalstandard,theoperatingfrequencybandis2.4GHz,thebandwidthis1Mb/s.Bluetoothtechnologyisauniversalradiointerfaceinthe2.45GHzfrequencybandthatenablesportableelectronicdevicestoconnectandcommunicatewirelesslyviashort-range,adhocnetwork.Eachunitcansimultaneouslycommunicatewithuptoseveralotherunitsperpiconet.Moreover,eachunitcansimultaneouslybelongtoseveralpiconets.BluetoothtechnologywhichapartfromEricsson,hasgainedthesupportofNokia,IBM,Toshiba,Intelandmanyothermanufactures,eliminatestheneedforwires,cablesandconnectorsforandbetweencordlessormobilephones,modems,headsets,PDAs,computers,printers,projectors,localareanetworks,andsoon,andpavesthewayfornewandcompletelydifferentdevicesandapplications.2：WhatarethecharacteristicsofBluetoothtechnology?·1Ms/ssymbolrateexploitsmaximumavailablechannelbandwidth;·Fastfrequencyhoppingavoidsinterference;·Adaptiveoutputpowerminimizesinterference;·Shortdatapacketsmaximizeinterference;·Fastacknowledgeallowslowcodingoverheadforlinks;·Flexiblepackettypessupportwideapplicationrange;·Airinterfacetailoredtominimizecurrentconsumption;·CVSD(continuousvariableslopedeltamodulation)voicecodingenablesoperationathighbiterrorrates.3：ThebasictechnicalinformationandapplicationBluetoothtechnologyisfreeforallthepeople.Itworksin2.4GHzbandwithoutlicensing,andcanbeusedinindustrial,technology,medicine(ISM).Theproductsintegratedthetechnology,frommobilephones,carstothemedicalequipment,moreover,theusersfromconsumers,industrialmarketstoenterprises,aretoonumeroustomentiononebyone.Bluetoothisanimmediatetechnique,itdoesnotrequirearegularinfrastructure,