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通信工程专业英语Unit9：WDM.ppt

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信息与通信工程专业介绍(英文版)(1)

信息与通信工程专业介绍(英文版)(1)
A means of interconnecting these devices - a medium that can transport the messages from one device to another
Devices on the network that exchange messages with each other
1837-Morse-telegram；1876-Bell-telephone；1895-Marconi-radio
The development of Communication
development of transmission channel multicore cable—Coaxial Cable—optical fiber 多芯电缆—同轴电缆—光纤
The development of Communication
（1）In ancient times ，information could be transferred through light or sound。
光通信：中国--烽火台、希腊—火炬的位置表示字母符号 声通信：中国—击鼓鸣金
（2）Beginning and turning point：
The future of Communication
（3）5w：whatever wherever whoever whomever whenever
任何人在任何时间、任何地点接收来自任何人的任何信息
The future of Communication
Mobile Cellular Network
The Elements of a Network
The diagram shows elements of a typical network, including devices, media, and services, tied together by rules, that work together to send

通信工程专业英语Unit9：WDM

通信工程专业英语Unit9：WDM

Application scenarios of WDM
• Backbone networks: WDM technology is widely used in backbone networks to provide high-speed and large-capacity data transmission services. It can effectively improve the network capacity and transmission speed, and is an important technology to support the development of the Internet.
The Development History of WDM
The first WDM system was developed in the early 1970s, but it was not widely used until the 1990s due to technical difficulties and high cost.
Frequency-division Multiplexing (FDM)
In FDM, different optical signals are generated at different frequencies,
allowing them to be transmitted simultaneously through the same
Communication Engineering Professional English Unit9: WDM
目录
• introduction • The basic principles of WDM • Key Technologies of WDM • The advantages and challenges

无线通信英文简介PPT

无线通信英文简介PPT

What is the wireless communication?
Why should we use the wireless
communication?
How does the wireless
communication system work?
content
The definition of wireless communication The application of wireless communication The architecture of wireless communication The vision of wireless communication
Wireless Communication
Vocabulary
architecture n.构架 bluetooth n.蓝牙 cellular adj. 蜂窝状 的 channel n.信道 electromagnetic wave n.电磁波 forwarding portability subscriber transceiver wired wireless n. 转接 n.可移植性 n. 用户 n.收发机 adj.有线的 adj.无线的
The application of wireless communication
Cellular Telephone Systems GSM TD-SCDMA WCDMA CDMA2000 Wireless LANs Bluetooth Satellite Networks
*GSM: Global System For Mobile Communications *LAN: Local Area Network *CDMA: Code Division Multiple Access

通信工程专业英语词汇

通信工程专业英语词汇

中国联通China Unicom中国挪移China Mobile网络容量network capacity交换容量exchange capacity扩容Capacity Expansion平滑升级smooth upgrade射频Radio Frequencies接收灵敏度Receive Sensitivity: 数据Data Options传输速率Data Rate电源部份Power supply数据接口Data Interface天线接口Antenna Interface传输速率Baud Rate用户交互界面User Interface认证Certifications网络数据传输数率net data transfer rate联通无限U-Max旗下subordinate]品牌trademarkU-Info 互动视界U-Magic 奇妙宝典U-Net 掌中宽带U-Mail 彩eU-Map 定位之星U-Sms 联通在信应用服务Application Service产业价值链industrial value chain 战略目标strategic objective渠道channel转型transition/Transformation推广extension针对aim at电信telecommunication整合conformity市场渗透率market penetration factor微观的microcosmic科学技术science and technology 地理环境geographic environment 宏观的macroscopical供应链supply chain产品种类product variety价格水平price level销售方式modes of sale客户client敏感sensitivity营业场所business ground or office投诉complaintelecom operators 电信运营商指标index第二手资料secondary source data 第一手材料the first-hand material/first-hand data分销商distributor管理者administrative supervisor 增值value increment副总经理deputy general manager 交通枢纽traffic hub渤海Bohai Sea华北平原North China Plain人力资源human resources奖惩rewards and punishment长江三角洲the Yangtze Delta 珠江三角洲Pearl River Delta经济圈economic circle经济一体化economic integration 地形terrain地貌topographic feature海岸线coast line造纸paper making胶片film化工chemical industry]矿产minerals可支配收入disposable income良性循环virtuous circles生产总值total output value人均国内生产总值per capita GDP消费性支出nonproductive expenditure衣、食、住、行basic life necessities of clothing, food, shelter and weans of travel产业结构industrial structure结构优化optimum structure改革开放reform and opening翻两番quadruple可持续发展sustainable development城市化urbanizationActuator 执行器A:Amplifier 放大器A:Attendance 员工考勤A:Attenuation 衰减AA:Antenna amplifier 开线放大器AA:Architectural Acoustics 建造声学AC:Analogue Controller 摹拟控制器ACD:Automatic Call Distribution 自动分配话务ACS:Access Control System 出入控制系统AD:Addressable Detector 地址探测器ADM:Add/Drop Multiplexer 分插复用器ADPCM:Adaptive Differential ulse Code Modulation 自适应差分脉冲编码调制AF:Acoustic Feedback 声反馈AFR:Amplitude /Frequency Response 幅频响应AGC:Automati Gain Control 自动增益控制AHU:Air Handling Unit 空气处理机组A-I:Auto-iris 自动光圈AIS:Alarm Indication Signal 告警指示信号AITS:Acknowledged Information Transfer Service 确认操作ALC:Automati Level Control 自动平衡控制ALS:Alarm Seconds 告警秒ALU:Analogue Lines Unit 摹拟用户线单元AM:Administration Module 管理模块AN:Access Network 接入网ANSI:American National Standards Institute 美国国家标准学会APS:Automatic Protection Switching 自动保护倒换ASC:Automati Slope Control 自动斜率控制ATH:Analogue Trunk Unit 摹拟中继单元ATM：Asynchrous Transfer Mode 异步传送方式AU- PPJE:AU Pointer Positive Justification 管理单元正指针调整AU:Administration Unit 管理单元AU-AIS:Administrative Unit Alarm Indication SignalAU 告警指示信号AUG:Administration Unit Group 管理单元组AU-LOP:Loss of Administrative Unit Pointer AU 指针丢失AU-NPJE:AU Pointer Negative Justification 管理单元负指针调整AUP:Administration Unit Pointer 管理单元指针AVCD:Auchio &Video Control Device 音像控制装置AWG:American Wire Gauge 美国线缆规格BA:Bridge Amplifier 桥接放大器BAC:Building Automation & Control net 建造物自动化和控制网络BAM:Background Administration Module 后管理模块BBER:Background Block Error Ratio 背景块误码比BCC:B-channel Connect ControlB 通路连接控制BD:Building DistributorBEF:Buiding Entrance Facilities 建造物入口设施BFOC:Bayonet Fibre Optic Connector 大口式光纤连接器BGN:Background Noise 背景噪声BGS: Background Sound 背景音响BIP-N:Bit Interleaved Parity N code 比特间插奇偶校验N 位码B-ISDN:Brand band ISDN 宽带综合业务数字网B-ISDN:Broad band -Integrated Services Digital Network 宽带综合业务数字网BMC:Burst Mode Controller 突发模式控制器BMS:Building Management System 智能建造管理系统BRI:Basic Rate ISDN 基本速率的综合业务数字网BS:Base Station 基站BSC:Base Station Controller 基站控制器BUL：Back up lighting 备用照明C/S: Client/Server 客户机/服务器C:Combines 混合器C:Container 容器CA:Call Accounting 电话自动计费系统CATV:Cable Television 有线电视CC:Call Control 呼叫控制CC:Coax cable 同轴电缆CCD:Charge coupled devices 电荷耦合器件CCF:Cluster Contril Function 簇控制功能CD:Campus Distributor 建筑群配线架CD:Combination detector 感温，感烟复合探测器CDCA:Continuous Dynamic Channel Assign 连续的动态信道分配CDDI:Copper Distributed Data 合同缆分布式数据接口CDES:Carbon dioxide extinguisbing system 二氧化碳系统CDMA:Code Division Multiplex Access 码分多址CF:Core Function 核心功能CFM:Compounded Frequency Modulation 压扩调频繁CIS:Call Information System 呼叫信息系统CISPR:Internation Special Conmittee On Radio Interference 国际无线电干扰专门委员会CLNP:Connectionless Network Protocol 无连接模式网络层协议CLP:Cell Loss Priority 信元丢失优先权CM:Communication Module 通信模块CM:Configuration Management 配置管理CM:Cross-connect Matrix 交叉连接矩阵CMI:Coded Mark Inversion 传号反转码CMISE:Common Management Information Service 公用管理信息协议服务单元CPE:Convergence protocol entity 会聚协议实体CR/E:card reader /Encoder (Ticket reader )卡读写器/编码器CRC:Cyclic Redundancy Check 循环冗佘校验CRT:Cathode Ray Tabe 显示器，监视器，阴极射线管CS: Convergence service 会聚服务CS:Cableron Spectrum 旧纳档块化技术CS:Ceiling Screen 挡烟垂壁CS:Convergence Sublayer 合聚子层CSC:Combined Speaker Cabinet 组合音响CSCW:Computer collaborative work 协同工作CSES:Continuiussupported 计算机支持的SeverelyErrored Second 连续严重误码秒CSF:Cell Site Function 单基站功能控制CTB:Composite Triple Beat 复合三价差拍CTD：Cable Thermal Detector 缆式线型感温探测器CTNR:carrier to noise ratio 载波比CW:Control Word 控制字D:Directional 指向性D:Distortion 失真度D:Distributive 分布式DA:Distribution Amplifier 分配的大器DBA:Database Administrator 数据库管理者DBCSN:Database Control System Nucleus 数据库控制系统核心DBOS:Database Organizing System 数据库组织系统DBSS:Database Security System 数据库安全系统DC:Door Contacts 大门传感器DCC:Digital Communication Channel 数字通信通路DCN:Data Communication Network 数据通信网DCP-I:Distributed Control Panel -Intelligent 智能型分散控制器DCS:Distributed Control System 集散型控制系统DDN:Digital Data Network 数字数据网DDS:Direct Dignital Controller 直接数字控制器DDW:Data Describing Word 数据描述字DECT:Digital Enhanced Cordless Telecommunication增强数字无绳通讯DFB:Distributed Feedback 分布反馈DID:Direct Inward Dialing 直接中继方式，呼入直拨到分机用户DLC:Data Link Control Layer 数据链路层DLI:DECT Line Interface DODI:Direct Outward Dialing One 一次拨号音DPH:DECT PhoneDRC:Directional Response Cahracteristics 指向性响应DS:Direct Sound 直正声DSP:Digital signal Processing 数字信号处理DSS：Deiision Support System 决策支持系统DTMF:Dual Tone Multi-Frequency 双音多频DTS:Dual -Technology Sensor 双鉴传感器DWDM:Dense Wave-length Division Multiplexing 密集波分复用DXC:Digital Cross-Connect 数字交叉连接E:Emergency lighting 照明设备E:Equalizer 均衡器E:Expander 扩展器EA-DFB:Electricity Absorb-Distributed Feedback 电吸收分布反馈ECC:Embedded Control Channel 嵌入或者控制通道EDFA:Erbium-Doped FiberAmplifier 掺饵光纤放大器EDI:Electronic Data Interexchange 电子数据交换EIC:Electrical Impedance Characteristics 电阻抗特性EMC ：Electro Magnetic Compatibiloty 电磁兼容性EMI:Electro Magnetic Interference 电磁干扰EMS:Electromagnetic Sensitibility 电磁敏感性EN:Equivalent Noise 等效噪声EP:Emergency Power 应急电源ES:Emergency Sooket 应急插座ES:Evacuation Sigvial 疏散照明ESA:Error SecondA 误码秒类型AESB:ErrorSecondB 误码秒类型BESD:Electrostatic Discharge 静电放电ESR:Errored Second Ratio 误码秒比率ETDM:Electrical Time Division Multiplexing 电时分复用ETSI:European Telecommunication Standards Institute 欧洲电信标准协会F:Filter 滤波器FAB:Fire Alarm Bell 火警警铃FACU:Fire Alarm Contrlol Unit 火灾自动报警控制装置FC:Failure Count 失效次数FC:Frequency Converter 频率变换器FCC:Fire Alarm System 火灾报警系统FCS:Field Control System 现场总线FCU：Favn Coil Unit 风机盘管FD:Fire Door 防火门FD:Flame Detector 火焰探测器FD:Floor DistributorFD:Frequency Dirsder 分频器FDD:Frequency Division Dual 频分双工FDDI ：Fiberdistributed Data Interface 光纤缆分布式数据接口。

光纤通信系统波分复用系统WDM-共64页课件

光纤通信系统波分复用系统WDM-共64页课件

中心频率 193.6 193.5 193.4 193.3 193.2 193.1 193.0 192.9 192.8 192.7 192.6 192.5 192.4 192.3 192.2 192.1
4 波系统 * * * *
8 波系统 * * * * * * * *
16 波系统 * * * * * * * * * * * * * * * *
（a）现实的需要性，以2.5Gb／s系统为例， 16波分单向就可达到40Gb／s的传输速率， 这足以满足未来几年的业务需求；
（b）技术的可行性。当前波分复用器件和激 光器元件的技术都满足16个波长以上的复用。
从当前应用上看，WDM系统只用于 2.5Gb／s以上的高速率系统。因而在制定规 范的过程中，我们主要考虑了基于2.5Gb／s SDH的干线网WDM系统的应用，承载信号为 SDH STM-16系统，即2.5Gb/s×N的WDM 系统。对于承载信号为其他格式(例如IP)的系 统和其它速率（例如10Gb/s×N）暂不作要 求。
开放式波分复用系统：就是波分复用器前端 加入波长转移单元OTU，将当前SDH的 G.957接口波长转换为G.692的标准波长光 接口。可以接纳过去的老SDH系统，并实 现不同厂家互联，但OTU的引入可能对系 统性能带来一定的负面影响。
双向WDM系统在设计和应用时必须要考虑几个关 键的系统因素：
如为了抑制多通道干扰(MPI)，必须注意到光反射的影响、 双向通路之间的隔离、串扰的类型和数值、两个方向传输的功 率电平值和相互间的依赖性、光监控信道(OSC)传输和自动功 率关断等问题，同时要使用双向光纤放大器。
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Unit 9：WDM

Unit 9：WDM

Specialized English on Communication Engineering
It is very likely that the optical network will be used to convey large amounts of video information in the future. video information ：视频信息 很有可能将来光网络会用来传送大量的视频信息。 很有可能将来光网络会用来传送大量的视频信息。
Specialized English on Communication Engineering
Highways of light span the globe, transmitting massive amounts of information in the twinkling of an eye. The equivalents of millions of telephone calls are transmitted on a single fiber, thinner than a human hair. Astounding as these advances may seem, we are only at the beginning of what is possible . massive ：大量的；astounding ：令人吃惊的 大量的； 光的高速公路跨越全球，眨眼之间传输巨量的信息。 光的高速公路跨越全球，眨眼之间传输巨量的信息。这等于 数百万电话的通信量通过比人的头发还细的光纤进行传输。 数百万电话的通信量通过比人的头发还细的光纤进行传输。 这些成就似乎使人很吃惊， 这些成就似乎使人很吃惊，但我们只是处于可能会产生更大 成就的开始。 成就的开始。 Specialized English on Communication Engineering

wdm波分复用网络PPT课件

wdm波分复用网络PPT课件
图13-10 电中继器（REG）的信号流向图
第22页/共38页
3．DWDM网络的一般组成
（1）点到点组网 DWDM的点到点组网示意图如图13-11所示。 （2）链形组网 DWDM的链形组网示意图如图13-12所示。 （3）环形组网 DWDM环形组网示意图如图13-13所示。
图13-11 DWDM的点到点组网示意图
电时分复用面临的问题：
•“电子瓶颈”限制：
10Gb/s→40Gb/s… •光纤色散限制 •单波长通信系统远不能有效利用光纤带宽
101 1
signal1
100 1
signal2
TDM signal
1 1001011
第3页/共38页
13.1.1．DWDM技术产生背景
传统的传输网络扩容方法采用空分多路复用（SDM）和时分 多路复用（TDM）两种方式。
（1）SDM靠增加光纤数量的方式线性增加传输系统的容量， 传输设备也线性增加。空分多路复用的扩容方式十分受限。
（2）TDM是比较常用的扩容方式，从PDH的一次群至四次群 的复用，到SDH的STM-1、STM-4、STM-16至STM-64的复用。 但达到一定的速率等级时，会受到器件和线路等特性的限制。
(4) 可扩展性好。 (5) 降低器件的超高速要求。
第14页/共38页
13. 2 DWDM系统结构
1．DWDM器件
DWDM器件分为合波器和分波器两种，如图13-5所示。 合波器的主要作用是将多个信号波长合在一根光纤中传输。 分波器的主要作用是将在一根光纤中传输的多个波长信号分离。
图13-5 DWDM器件
第38页/共38页
经合波器复用成DWDM主信道，然后对其进行光放大，并附加上
波长为λs的光监控信道。

通信工程专业英语

通信工程专业英语

一、汉译英1、时分多址：TDMA （Time Division Multiple Address/ Time Division Multiple Access）2、通用无线分组业务：GPRSGeneral Packet Radio Service3、国际电报电话咨询委员会：CCITT4、同步数字体系：SDH Synchronous Digital Hierarchy （同步数字序列）5、跳频扩频：FHSS frequency hopping spread spectrum6、同步转移模块：STM synchronous transfer module7、综合业务数字网：ISDNIntegrated Services Digital Network8、城域网：MAN Metropolitan Area Network9、传输控制协议/互联网协议：TCP/IPTransmission Control Protocol/Internet Protocol10、服务质量：QOS Quality of Service11、中继线：trunk line12、传输速率：transmission rate13、网络管理：network management14、帧结构：frame structure15、移动手机：Mobile Phone 手机 Handset16、蜂窝交换机：（Cellular switches）（电池开关cell switch）(cell 蜂房)17、天线：Antenna18、微处理器：microprocessor19、国际漫游：International roaming20、短消息：short message21、信噪比：SNR(Signal to Noise Ratio)22、数字通信：Digital communication23、系统容量：system capacity24、蜂窝网：cell network（cellular network）（Honeycomb nets）25、越区切换：Handover26、互联网：internet27、调制解调器：modem28、频谱：spectrum29、鼠标：Mouse30、电子邮件：electronic mail E-mail31、子网：subnet32、软件无线电：software defined radios33、网络资源：network resources 八、英译汉1、mobile communication：移动通信2、Computer user：计算机用户3、Frame format：帧格式4、WLAN：wireless local area network 无线局域网络5、Communication protocol：通信协议6、Transmission quality：传输质量7、Remote terminal：远程终端8、International standard：国际标准9、GSM：全球移动通信系统Global System for Mobile Communications10、CDMA：码分多址Code Division Multiple Access11、ITU：国际电信联盟International Telecommunication Union12、PCM：pulse code modulation 脉冲编码调制13、WDM：波分复用Wavelength Division Multiplex14、FCC：联邦通信委员会Federal communications commission15、PSTN：公用电话交换网Public Switched Telephone Network16、NNI：网络节点借口Network Node Interface17、WWW：万维网World Wide Web18、VOD：视频点播Video-On-Demand19、VLR：访问位置寄存器Visitor Location Register20、MSC：移动交换中心Mobile Switching Centre21、HLR：原籍位置寄存器Home Location Register22、VLSI：超大规模集成电路Very Large Scale Integrated Circuits23、Bluetooth technology：蓝牙技术24、Matched filter：匹配滤波器25、ADSL：非对称数字用户环路Asymmetrical Digital Subscriber Loop非对称数字用户线路(Asymmetric Digital Subscriber Line)26、GPS：全球定位系统Global Position System27、ATM：异步传输模式Asynchronous Transfer Mode1、脉冲编码调制（PCM）依赖于三个独立的操作：抽样、量化和编码。

通信专业英语论述.ppt

通信专业英语论述.ppt
e.g. These inexpensive and relatively fast digital circuits have made it possible to construct highly sophisticated digital systems that are capable of performing complex digital signal processing functions and tasks, which are usually too difficult and/or too expensive to be performed by analog circuitry or analog signal processing systems.
Interactive-network → internet 互联网、因特网
transmitter-receiver → transceiver 收发器
0.1 科技英语的特点 features
0.1.1 长句 Long sentences
有th两e种ra方tio法o简f A化to长B句：，A以与正B确的把比握率长句句意—— In依su据lat谓ion语绝动缘词，把in复s合ula句te分d 解，成ins一ul组ati简ng单句。 di依ele据ct关ric键co词n简sta化nt词介组电。常数
❖专业词汇 Speciality vocabularies
electronic 电子的 ～ mail（Email） electric 电的 ～ voltage，～ current，～ resistance electrical 电气的 ～ engineer ，～ property
electro- 电- electromagnetic wave，electrodynamic

信息与通信工程专业英语ppt课件

信息与通信工程专业英语ppt课件
Speech Coding
Fundamentals of quantization, PCM, Vocoder
Brief Overview of System Standards
GSM, IS-95, IMT2000
Jin Wang
4
References
Theodore S. Rappaport, Wireless Communications: Principles & Practice, Prentice-Hall, 2nd Edition.
A sophisticated switching technique called a handover enables a call to proceed uninterrupted across cell boundaries.
All the BS’s are connected to a mobile switching center (MSC) which is responsible for connection users to the public switched telephone network (PSTN).
A demanding task. Technological challenges include: Time–varying, hostile communication channel. Location and tracking complexities due to mobility. Efficient use of scarce resources such as frequency spectrum ⇒ cellular structure. The amount of interference generated is critical. Power restrictions due to health issues.

信息与通信工程专业介绍(英文版)(1)

信息与通信工程专业介绍(英文版)(1)
Brief Introduction to Information and Communication Engineering
2011.5.30
Brief Introduction to Information and
Communication Engineering
Among all of the essentials for human existence, the need to interact with others ranks just below our need to sustain life. Communication is almost as important to us as our reliance on air, water, food, and shelter.
development of Communication components vacuum tube—transistor—integrate circuit—large scale integrated
circuit 真空管—晶体管—集成电路—大规模集成电路
development of transmission method telegram— voice —Much carrier modulation—pulse - code
What is Communication？

Communication in our daily lives takes many forms and occurs in many
modulation 电报--声音—多载波调幅—pcm
development of range of message voice —text —graph， image 声音—文字—图形、图像

通信工程专业英语

通信工程专业英语

一、二、三、汉译英1、时分多址：TDMA （Time Division Multiple Address/ Time Division Multiple Access）2、通用无线分组业务：GPRSGeneral Packet Radio Service3、国际电报电话咨询委员会：CCITT4、同步数字体系：SDH Synchronous Digital Hierarchy （同步数字序列）5、跳频扩频：FHSS frequency hopping spread spectrum6、同步转移模块：STM synchronous transfer module7、综合业务数字网：ISDNIntegrated Services Digital Network8、城域网：MAN Metropolitan Area Network9、传输控制协议/互联网协议：TCP/IPTransmission Control Protocol/Internet Protocol10、服务质量：QOS Quality of Service11、中继线：trunk line12、传输速率：transmission rate13、网络管理：network management14、帧结构：frame structure15、移动手机：Mobile Phone 手机Handset16、蜂窝交换机：（Cellular switches）（电池开关cell switch）(cell 蜂房)17、天线：Antenna18、微处理器：microprocessor19、国际漫游：International roaming20、短消息：short message21、信噪比：SNR(Signal to Noise Ratio)22、数字通信：Digital communication23、系统容量：system capacity24、蜂窝网：cell network（cellular network）（Honeycomb nets）25、越区切换：Handover26、互联网：internet27、调制解调器：modem28、频谱：spectrum29、鼠标：Mouse30、电子邮件：electronic mail E-mail31、子网：subnet32、软件无线电：software defined radios33、网络资源：network resources四、英译汉1、mobile communication：移动通信2、Computer user：计算机用户3、Frame format：帧格式4、WLAN：wireless local area network 无线局域网络5、Communication protocol：通信协议6、Transmission quality：传输质量7、Remote terminal：远程终端8、International standard：国际标准9、GSM：全球移动通信系统Transfer Mode Global System for Mobile Communications10、C DMA：码分多址Code Division MultipleAccess11、ITU：国际电信联盟International Telecommunication Union12、P CM：pulse code modulation 脉冲编码调制13、W DM：波分复用Wavelength DivisionMultiplex14、F CC：联邦通信委员会Federal communications commission15、P STN：公用电话交换网Public Switched Telephone Network16、N NI：网络节点借口Network Node Interface17、W WW：万维网World Wide Web18、V OD：视频点播Video-On-Demand19、V LR：访问位置寄存器Visitor Location Register20、MSC：移动交换中心Mobile SwitchingCentre21、H LR：原籍位置寄存器Home Location Register22、VLSI：超大规模集成电路Very Large Scale Integrated Circuits23、Bluetooth technology：蓝牙技术24、Matched filter：匹配滤波器25、ADSL：非对称数字用户环路Asymmetrical Digital Subscriber Loop非对称数字用户线路(Asymmetric Digital Subscriber Line)26、GPS：全球定位系统Global PositionSystem27、ATM：异步传输模式Asynchronous三、汉译英1、脉冲编码调制（PCM）依赖于三个独立的操作：抽样、量化和编码。

电子与通信工程专业英语Unit 9 Network Simulation

电子与通信工程专业英语Unit 9 Network Simulation

9
Other examples also include ns-2(ns Network simulator), VINT (VINT homepage), U-Net (T. Von.Eicken,et.al.1995),USC TCP-Vegas testbed(J.s.Ahn,et.al.1995), and Harvard simulator (S.Y.Wang,H.K.Kung 1999). As to commercial simulator, examples include BONeS(Cadence Inc.), COMNET Ⅲ(CACI) and OPNET(MIL3).BONeS DESIGNER provides lots of building blocks, modeling capabilities, and analysis tools for development and analysis of network products, protocols and system architectures.
10
With its recent released ATM Verification Environment (AVE), it is specifically targeted for ATM architectural exploration and hardware sizing. COMNET Ⅲ, a graphical, off-the-shelf package, let’s you quickly and easily analyzes and predicts the performance of networks ranging from simple LANs to complex enterprise-wide systems (CACI).

通信专业英语课件

通信专业英语课件

English for Special Purpose——Electronic Information & Communication Engineering引入话题Introducing the Subject and the outline of the PresentationBackground Information•I would like to start by briefly reviewing the history of open heart surgery.•Let us start with the theoretical basis of this new technique.•To begin with, we have to consider the principle.•I think it would be best to start out by looking at a few slides.•I should like to preface my remarks with a description of the basic idea.•May I begin with a general outline of this project?•The first thing I would like to talk about is the definition of the terms I shall use in my lecture.•The first point I'd like to make is the historical background of the invention.•First, I shall explain to you why this new program is correct and feasibleTopic•I would like to concentrate on the problem of ……•I want to confine my talk to the latest developments in civil engineering.•Today, I am going to give a talk on the application of computers in medicine.•My topic today will deal with the observation of supernova.•In my presentation this morning, I'll limit myself to three major points only.•I take the liberty of restricting my discussion mainly to highway bridge construction.•Now, I would like to address myself to the most important aspect of this problem.•Among the many languages, I shall mention only BASIC.•What I am going to present today is the methodology and the data analysis.•I'm not going to say much about that except to discuss the literature on that topic.Outlining•My talk today consists of two parts. One is... and the other is...•I've divided my presentation into four parts.•I shall first talk about ... and then touch on... and finally discuss ...•The subject can be looked at under the following headings: ... (Pointing to the PowerPoint display)•I would like to divide my talk into two parts. The first part deals with…, the second part concerns ...•My presentation will be given in four parts. The first part deals with ... The second part relates to... The third part concerns ... And the last part discusses…Purpose/Objective•The purpose of this presentation is to...•This talk is designed to…Summary-How to Prepare a Good Introduction•Realize file great importance of the introduction of file presentation made then do your best in delivering it.•Don' t make file introduction either too wordy, or too brief. Usually, it covers 10 to 15 percent of your entire speech.•Select right ways to capture the audience attention.Characteristic and Translation一、大量使用名词化结构《当代英语语法》（A Grammar of Contemporary English）在论述科技英语时提出，大量使用名词化结构（Nominalization）是科技英语的特点之一。

Optical Fiber Communications光纤通讯知识课件

Optical Fiber Communications光纤通讯知识课件
• Wavelength routing and switching techniques based on lightpaths are being developed
19
1.6 Key Elements of Optical Fiber Systems
• Transmitter: a light source and signal-formatting circuitry • A cable offering mechanical and environmental protection
Optical Fiber Communications
Chapter 1 Overview
School of Electrical and Electronic Enginesering, Hubei University of Technology
Overview – Chapter 1
1.1 Motivations for Lightwave Communications
School of Electrical and Electronic Enginesering, Hubei University of Technology
School of Electrical and Electronic Enginesering, Hubei University of Technology
• Short band (S-band): 1460 to 1530 nm (shorter than C-band) • Conventional band (C-band): 1530 to 1565 nm (EDFA region) • Long band (L-band): 1565 to 1625 nm (longer than C-band) • Ultra-long band (U-band): 1625 to 1675 nm

电子与通信工程专业英语DX 电子教案Unit 9

电子与通信工程专业英语DX 电子教案Unit 9

Unit 9 Global Positioning System (GPS)I．Lead-inInformation related to the textDo you know What Global Positioning System is? What are the three segments of a GPS system? How does GPS operate? Today, we’ll study Unit 9 “Global Positioning System (GPS) ”. We’ll study the definition of GPS, study the working principle of GPS.GPS uses satellite technology to enable a terrestrial terminal to determine its position on the Earth in latitude and longitude．If you want to learn more about GPS, you should focus on the study of unit 9. Now, let’s study key words and phrases of the text together.II. Word study1.simultaneously [,siml'teiniəsli] adv. 同时地1) simultaneous的变形：simultaneous adj.(1) 同时发生(或存在)的；同时进行的，同步的(2)【数学】方程等联立的2) The image below is an example of showing an image and some text simultaneously.下面的图像是同时显示图像和一些文本的示例。

光纤通信(Optical Fiber Communication)Optical FiberPPT课件

光纤通信(Optical Fiber Communication)Optical FiberPPT课件

tan
2
2E0x E0y cos
E02x E02y
2020/7/24
The Sch. Of Information Engineering, WHUT
14
CONTENT
2020/7/24
The Sch. Of Information Engineering, WHUT
15
CONTENT
When E0x E0 y E0 , 2 2m (m 0, 1, 2 )
CONTENT
Chapter2 Optical Fiber
2020/7/24
The Sch. Of Information Engineering, WHUT
1
OUTLINE
CONTENT
The nature of light The fabrication of optical fibers The structure of an optical fiber The propagation principle of light along a fiber The transmission character of fiber
CONTENT
In 1815, Fresnel gived the correct explanation of diffraction. In 1864, Maxwell theorized that light waves must be electromagnetic in nature. The observation of polarization effects indicated that light wave are transverse. It is no different from a radio wave except that the wavelength is much shorter.
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Specialized English on Communication Engineering
No matter what application it is that is generating traffic, most of this traffic will be carried by the unifying optical layer. 不管是哪一种产生业务的应用，大多数这种业务将会由统一 的光层进行传送。
Specialized English on Communication Engineering
The current explosion of traffic in the worldwide networks is ample evidence of the speed with which we are adopting new communications technologies. The growth of wireless systems and the Internet are well-documented phenomena. explosion ：爆发，激增 traffic ：交通, 通行, 运输, 贸易,交易, (电信)业务 wireless systems ：无线系统 目前全球网络业务的激增充分地表明了我们采用新的通信技术 的速度。无线系统和因特网的发展就是很好的证明。
exponential adj. 指数的，幂的
Specialized English for Communication Engineering
Even visionaries such as Albert Einstein and Isaac Newton, who contributed significantly to our understanding of the properties of light and its fundamental importance, would not likely imagine the communications networks of today. visionary ：空想家, 梦想者, 好幻想的人 fundamental ：基础的, 基本的 爱因斯坦和牛顿在我们对光特性的了解及其基本重要性方面 做出了重大的贡献，即使是这样富于幻想的人也不大可能想 象的到今天通信网络发展的程度。
without affecting one another, so several channels of
l information (each having a dif话fe音rent carrier wavelength)
can be transmitted simultaneou数sl据y over a s0ingle fiber. This
Specialized English on Communication Engineering
For this reason, the growth of various applications such as telephony (whether cellular or fixed), Internet, video transmission, computer communication and database access leads directly to an increase in the demand placed on the optical network. telephony ：电话学, 电话, 电话通讯 由于这一原因，各种应用的增长，如电话（移动或固定）、 因特网、视频传输、计算机通信和数据库接入直接导致对光 网络持续增长的需要。
n. 等价物, 相等物
video n. (adj.) 电视（的），视频（的），影像（的）
approximate adj. 近似的，大概的 adv. ~ly
boost
v. 推进，增加，提高
eliminate v. 排除，淘汰
considerable adj. 相当大的，相当多的
simultaneous adj. 同时发生的，同时存在的，同时的
专业英语
——Specialized English
第二部分 通信技术
Unit 9： WDM （Wavelength Division Multiplexing）
——波分复用
Wavelength Division Multiplexing (波分复用):
在Op一tic根al光bea纤m中s w同ith时di传ffe输ren多t w波av长ele光ng信ths号p的rop一ag种ate技术
Specialized English on Communicaght span the globe, transmitting massive amounts of information in the twinkling of an eye. The equivalents of millions of telephone calls are transmitted on a single fiber, thinner than a human hair. Astounding as these advances may seem, we are only at the beginning of what is possible . massive ：大量的；astounding ：令人吃惊的 光的高速公路跨越全球，眨眼之间传输巨量的信息。这等于 数百万电话的通信量通过比人的头发还细的光纤进行传输。 这些成就似乎使人很吃惊，但我们只是处于可能会产生更大 成就的开始。
l schem话e,音called wavelength-division multiplle1xing (WWDDMM),
increas数es据the inf0ormation-carrying capacli2ty of a fiber. . . ln 单波长的系统 波分复用系统
Specialized English for Communication Engineering
波分复用的原理
λ1
λ1
λ2
λ2
λ3
λ3
合
分
波
波
器
器
λn
λn
NEW WORDS AND PHRASES
visionary n. 幻想家，梦想家
significant adj. 重大的，效果显著的
span
n. 跨度, 跨距, 范围 v. 横越
equivalent adj. 相等的, 相当的, 同意义的