《电子信息专业英语》课件 Lesson 11 Bluetooth

UnitFour■主要内容：了解一些日常生活中常用的先进电子技术、通信技术等，包括如蓝牙技术，4G，5G等等。■学习目标：了解通信系统的基本知识，了解无线传输，有线传输的基本原理，以及他们各自在日常生活中的先进通信设备中的应用。■素质目标：引导自主思考，聚焦通信前沿，维护信息安全，树立远大理想，激发使命荣誉；塑造良好人格，培养自觉遵守职业道德和规范。Lesson11BluetoothKeywords■Bluetooth蓝牙■Destination目的地■Convenience方便■Technology技术■Exchange交换■Equipment设备■Standard标准■Frequency频率■Bandwidth带宽■Piconet微微网■Electronic电子的■Analogous相似的，相同的■Device设备■Application应用■Interface接口■Radio射频■Protocol协议■Spectrum谱■Infrastructure基础设施■License许可证■Numerous许多的■Simultaneously同时■Pave铺，铺满■Frequencyhopping频率跳跃■工作任务：鼠标、键盘、打印机、膝上型计算机、耳机和扬声器等怎样在PC环境中无线使用的？办公室之间怎样用无线网络实现对话？■学习目标：掌握蓝牙技术的概念和技术特征■重点难点：蓝牙技术的技术特征■推荐学时：6学时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,