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通信工程常用专业英语简写中英文翻译

通信工程常用专业英语简写中英文翻译3GPP 3rd Generation Partnership Project 第三代合作伙伴计划1x RTT cdma2000 1x Radio Transmission Technology cdma2000 第一代无线接入技术ACK Acknowledge 确认ACLR Adjacent Channel Leakage power Radio 邻信道泄露功率比ACS Adjacent Channel Selectivity 邻信道选择性AMC Adaptive Modulation and Codeing自适应编码调制A-MPR Additional Maximum Power Reduction 额外最大功率回退AoA Angle of Arrival 到达角AoD Angle of Departure 离开角ARQ Automatic Repeat request自动重传请求AS Angel Spread 角度扩展AWGN Additive White Gaussian Noise 加性高斯白噪声B3G Beyond 3rd Generation 后三代BCCH Broadcast Control Channel 广播控制信道BCH Broadcast Channel 广播信道BD Block Diagonalization块状对角化BER Bit Error Rate 误比特率BLER Block Error Rate误块率BM-SC Broadcast-Multicast Service Centre 广播/多播业务中心BSR Buffer Status Reports 缓存状态报告CA Carrier Aggregation 载波聚合CBRM Circular Buffer Rate Matching 循环缓存速率匹配CC Component Carrier 成员载波CC Chase Combine Chase聚合CCCH Common Control Channel 公共控制信道CCCH Common Control Channel 公共控制信道CCE Control Channel Element 控制信道单元CCO Coverage and Capacity Optimization 容量与覆盖优化CCO Cell Change Order 小区改变命令CCSA China Communication Standards Association 中国通信标准化协会CDD Cyclic Delay Diversity 循环延迟分集CDMA Code Division Multiple Access 码分多址接入cdma2000 Code Division Multiple Access 2000码分多址2000接入系统CFI Control format Indicator 控制格式指示CGI Cell Global Identifier 全球小区标识CoMP Coordinated Multi-Point transmission 协调多点传输CP Cylic Prefix 循环前缀CPM Conference Preparing Meeting 大会准备会议CQI Channel Quality Indicator 信道质量指示CRC Channel Redundancy Check 信道冗余校验B-RNTI Cell-Radio Network Temporary Identifier 小区无线网络临时标识CRS Common Reference Signal 公共参考信号CS Fallback Circuit Switching fallback 电路交换回退CS/BF Coordinated Scheduling/Beam-Forming 协调调度/波束赋形CSG Closed Subscriber Group 闭合用户组CSI Channel Status Information 信道状态信息CW Continuous Wave 连续波DAI Downlink Assignment Index 下行分配序号DCCH Dedicated Control Channel 专用控制信道DCI Downlink Control Information 下行控制信息DECT Digital Enhanced Cordless Telecommunications 数字增强无绳通信DL DownLink下行DL-SCH Downlink Shared Channel 下行共享信道DRB Date Radio Bearer 数据无线承载DRX Discontinuous Reception 非连续接受DS Delay Spread 时延扩展DTCH Dedicated Traffic Channel 专用业务信道DTX Discontinuous Transmission 非连续发送DwPTS Downlink Pilot Time Slot 下行导频时隙E3G Enhancement of 3rd Generation 三代增强EAP-AKA Extensible Authentication Protocol-Authentication and Key Agreement 可扩展认证协议-认证密码协商EARFCN E-UTRA Absolute Radio Frequency Channel Number E-UTRA绝对无线频率信道编号ECGI E-UTRAN Cell Global Identifier E-UTRAN全球小区标识ECM-IDLE EPS Connection Management-IDLE EPS连接管理空闲GMSK Gaussian Minimum Shift Keying 高斯最小频移键控EESM Exponential Effective SIR Mapping 指数有效信噪比映射eNode B evolved Node B 演进型节点BEPC Evolved Packet Core 演进型分组核心网EPS Evolved Packet System 演进形分组系统E-RAB E-UTRAN Radio Access Bearer 无线接入承载E-UTRAN Evolved Universal Terrestrial Radio Access Network 演进型通用无线接入网EVM Error Vector Magnitude 误差适量FDD Frequency Division Duplex 频分双工FDMA Frequency Division Multiple Access 频分复用FEC Forward Error Correction 前向纠错GBN Go-Back-N 回退N部GERAN GSM EDGE Radio Access Network GSM EDGE无线接入网GP Guard Period 保护间隔GPRS General Packet Radio System 通用分组无线业务GRE Generic Routing Encapsulation protocol 通用路由封装协议GSM Global System for Mobile Communications 全球移动通信系统GT Guard Time 保护时间GTP GPRS Tunneling Protocol GPRS隧道协议GTP-U GTP-User plane GPRS隧道协议-用户平面HARQ Hybrid ARQ 混合自动重传请求HE Home Environment 归属环境HeMS Home eNode B Management System 家庭基站管理系统HeNB Home eNode B 家庭基站HeNB GW Home eNode B Gateway家庭基站网关HFN Hyper Frame Number 超帧号HI HARQ Indicator HARQ指示HPRD (cdma2000)High Rate Packet Data cdma2000高速分组数据系统HSDPA High Speed Downlink Packet Access 高速下行分组接入HSPA+ High Speed Packet Access+ 增强型高速分组接入HUE Home User Equipment 家庭基站用户设备ICI Inter-Carrier Interference 载波间干扰ICI Inter-Cell Interference 小区间干扰ICIC Inter-Cell Interference Coordination 小区间干扰协调IE Information Element 信息单元IEC International Electrotechnical Commission 国际电工委员会IEEE Institute of Electrical and Electronics Engineers 电气与电子工程师协会IMEI International Mobile Equipment Identify 国际移动设备标识IMS IP Multimedia Subsystem IP多媒体子系统IMSI International Mobile Subscriber Identify 国际移动用户标识IMT International Mobile Telecommunication 国际移动通信IMT-2000 International Mobile Telecommunication 2000国际移动通信2000 IMT-Advanced International Mobile Telecommunication Advanced先进国际移动通信IoT Interference over Thermal 干扰热噪声抬升IP Interference Protocol 因特网协议IPR Intellectual Property Rights 知识产权IR Incremental Redundancy 增量冗余ISI Inter-Symbol Interference 符号间干扰ISO International Organization for Standardization 国际标准化组织ITU International Telecommunication Union 国际电信联盟ITU-D ITU Telecommunication Development Sector ITU无线电发展部门ITU-R ITU Radio Communication Sector ITU无线电通信部门ITU-T ITU Telecommunication S tandards Sector ITU无线电标准化部门JP Joint Processing 联合处理JP-CoMPJoint Processing CoMP联合处理多点协作传输L1/2/3 Layer 1/2/3 层1/2/3LN Log-normal 对数正态LoCH Logical Channel 逻辑信道LoS Line of Sight 视线距离LTE Long Time Evolution 长期演进LTE-A Long Time Evolution Advanced高级长期演进M3UA SS7 MTP3 User Adaptation Layer 七号信令系统MTP3用户适配层MAC Medium Access Control 媒体接入控制MAP Maximum A Posteriori Probability 最大后验概率MBMS Multimedia Broadcast Multicast Service 多媒体广播多播业务MBMS GW MBMS Gateway多媒体广播多播业务网关MBMSFN MBMS Single Frequency Network MBMS单频网MCCH Multicast Control Channel 多播控制信道MCE Multi-cell/multicast Coordination Entity 多小区/多播协调实体MCH Multicast Channel 多播信道MCS Modulation and Coding Scheme 调制编码方式MeNB Macro eNode B 宏基站MFD Maximum Free Distance 最大自由距离MIB Master Information Block 主信息快MI-ESM Mutual Information-Effective SIR Mapping 互信息有效信噪比映射MIMO Multiple Input Multiple Output 多输入多输出ML Maximum-Likelihood 最大似然MLD Most Likelihood Detection 最大似然解调MME Mobility Management Entity 移动性管理实体MMSE Minimum Mean Square Error 最小均方误差MPR Maximum Power Reduction 最大功率回退MSC Mobile Switching Centre 移动交换中心MTCH Multicast Traffic Channel 多播业务信道MTP3 Message Transfer Part Level 3 第3级消息传递部分MUE Macro UE 宏基站UEMU-MIMO Multiple User MIMO 多用户MIMONACC Network Assisted Cell Change 网络辅助小区改变NACK Negative Acknowledgement 否定确认NAS Non-Access Stratum 非接入层NGN Next Generation Network 下一代网络NLoS Non Line of Sight 非接入视线NSC NonSystematic Convolutional Codes 非系统卷积码O&M Operation and Maintenance 操作维护ODS Optimum Distance Spectrum 最优距离谱OFDM Orthogonal Frequency Division Multiplexing 正交频分复用OOB Out Of Band 带外OOK On-Off Key 开关键控PBCH Physical Broadcast Channel 物理广播信道PCCC Parallel Concatenated Convolutional Codes并行级联卷积码PCCH Paging Control Channel 寻呼控制信道PCFICH Physical Control Format Indicator Channel 物理控制格式指示信道PCH Paging Channel 寻呼信道PCI Physical Cell Identifier 物理小区标识PDC Personal Digital Cellular 独立的数字移动电话PDCCH Physical Downlink Control Channel 物理下行控制信道PDCP Packet Data Convergence Protocol 分组数据汇聚协议PDH Pseudo-synchronous Digital Hierarchy 准同步数字序列PDN Packet Data Network 分组数据网PDP Packet Data Protocol 分组数据协议PDSCH Packet Downlink Shared Channel 分组下行共享信道PDU Protocol Data Unit 协议数据单元PF Proportional-Fair 正比公平PHICH Physical Hybrid-ARQ Indicator Channel 物理HARQ指示信道PHY Physical Layer 物理层PLMN Public Land Mobile Network 公共陆地移动网PMCH Physical Multicast Channel 物理多播信道PMI Pre-coding Matrix Indicator 预编码矩阵指示PRACH Physical Random Access Channel 物理随机接入信道PRB Physical Resource Block 物理资源块PRS Positioning Reference Signals 定位参考符号PSS Primary Synchronized Signal 主同步信号PUCCH Physical Uplink Control Channel 物理上行同步信号QAM Quadrature Amplitude Modulation 正交振幅调制QoS Quality of Service 服务质量QoE Quality of Experence体验质量QPP Quadratic Permutation Polynomials 二次置换多项式QPSK Quadrature Phase Shift Keying 正交移相键控RA07 Radio Access in 2007 2007年无线电组委会RAB Radio Access Bearer 无线接入承载RACH Random Access Channel 无线接入信道RAN Radio Access Network 无线接入网RAT Radio Access Technology 无线接入技术RAU Routing Area Update 路由区更新RB Resource Block 资源块RBG Resource Block Group资源块组RBG Resource Bearer Group 无线承载组RBI Received Bit Information 接受比特信息RBIR Received Bit Information Rate接受比特信息速率RE Resource Element 资源单元REG Resource Element Group资源单组RIM RAN Information Management RAN 信息管理RIT Radio Interface Technology 无线接口技术RLC Radio Link Control 无线链路控制RM Reed-Muller 瑞德-穆勒RMS Root Mean Square（value）均方根RN Relay Node 中继节点RNC Radio Network Controller 无线网络控制器RNL Radio Network Layer 无线网络层RNTI Radio Network Temporary Identifier 无线网络临时标识ROHC Robust Header Compression 鲁棒性头压缩RPF Repetition Factor 重复因子RRC Radio Network Control 无线资源控制RRC Root Raised Cosine(for filter) 根升余弦RRM Radio Resource Management 无线资源管理RS Reference Signal 参考信号RSC Recursive Systematic Convolutional Codes递归系统卷积码RSRP Reference Signal Received Power 参考信号接收功率RSTD Reference Signal Time Difference 参考信号时间偏差RTT Round Trip Time 往返时间RV Redundancy Version 冗余版本S1AP S1 Application Protocol S1接口应用协议S1-MME S1 for the control plane 控制平面S1接口S1-U S1 for the user plane 用户平面S1接口SAE System Architecture Evolution 系统架构演进SAW Stop And Wait 停等SCCP Signaling Connection Control Part 信令连接控制部分SC-FDMA Single Carrier FDMA 单载波FDMASCM Spatial Channel Model 空分信道模型SCME Spatial Channel Model Extension空分信道模型扩展SC-OFDM Single Carrier OFDM 单载波OFDMSCTP Stream Control Transmission Protocol 流控传输协议SDH Synchronous Digital Hierarchy 同步数字系列SDMA Spatial Division Multiple Access 空分多址SDU Service Data Unit 业务数据单元SeGW Security Gateway 安全网关SEM Spectrum Emission Mask 频谱辐设模板S-GW Serving Gateway 服务网关SI System Information 系统信息SIB System Information Block 系统信息块SIC Successive Information Cancellation串行干扰消除SINR Signal-to-Interference plus Noise Ratio 信干噪比SIR Signal-to-Interference plus Noise 信干比SISO Soft-Input Soft-Output 软输入软输出SISO Single Input Single Output 单输入单输出SN Sequence Number 序列号SON Self-Organizing Network 自组织网SP Switching Points 转换点SPS Semi-Persistent Scheduling半持续调度SPS-CRNTI Semi-Persistent Scheduling-CRNTI半持续调度C-RNTI SR Scheduling Request 调度请求SRB Signaling Radio Bearer 心灵无线承载SRI Scheduling Request Indicator 调度请求指示SRITs Set of Radio Interface Technologies 无线接口技术集合SRS Sounding Reference Symbol 探测参考符号SRVCC Single Radio V oice Call Continuity 单一无线语音呼叫连续性SSS Secondary Synchronization Signal 辅同步信号S-TMSI SAE Temporary Mobile Subscriber Identity SAE临时移动签约用户标识SU-MIMO Single User MIMO 单用户MIMOTA Timing Advance时间提前量TA Tracking Area 跟踪区域TAC Tracking Area Code 跟踪区域码TAI Tracking Area Identity跟踪区域标识TDD Time Division Duplex 时分双工TD-LTE TD-SCDMA Long Time Evolution TD-SCDMA长期演进TDM Time Division Multiplex 时分复用TDMA Time Division Multiple Access 时分多趾TD-SCDMA Time Division Synchronous CDMA 时分同步CDMATEID Tunnel Endpoint Identifier 隧道端点标识TNL Transport Network Layer 传输网络层TPMI Transmitted Pre-coding Matrix Indicator 传输预编码指示TTI Transport Time Interval 传输时间间隔UCI Uplink Control Information 上行控制信息UDP User Datagram Protocol 用户数据协议UE User Equipment 用户设备UL Uplink 上行链路UL-SCH Uplink Shared Channel 上行共享信道UMTS Universal Mobile Telecommunication System 通用移动通信系统UpPTS Uplink Pilot Time Slot 上行导频时隙VLR Visitor Location Register 拜访位置寄存器V oIP V oice Over Internet Protocol 基于互联网协议的语音VRB Virtual Resource Block 虚物理资源块WCDMA Wideband CDMA 宽带CDMAWiMAX Worldwide interoperability for Microwave Access 全球微波接入互操作性WP5D Working Party 5D 5D工作组WRC07 World Radio Conference in 2007 2007年世界无线电大会X2AP X2 Application Protocol X2接口应用协议XPD Cross Polarization Distinguish 交叉极化分量ZF Zero Forcing 迫零3GPP的6个组织伙伴(OP)欧洲ETSI European Telecommunication Standards Institute 欧洲电信标准协会美国TIA Telecommunication Industry Association 美国电信工业协会日本TTC Telecommunication Technology Committee 日本电信技术委员会日本ARIB Association of Radio Industries and Businesses 日本电波产业协会韩国TTA Telecommunication TechnologyAssociation 韩国电信技术协会中国CCSA China Communication Standards Association 中国通信标准化协会。

通信工程专业英语课文翻译

Technology of Modern CommunicationText A: BluetoothBluetooth wireless technology is a short-range communications technology intended to replace the cables connecting portable（轻便的）and fixed devices while maintaining high levels of security.The key features of Bluetooth technology are robustness（稳健）, low power, and low cost .The Bluetooth specification defines a uniform structure for a wide range of devices to connect and communicate with each other.蓝牙无线技术是一种小范围无线通信技术，旨在保持高安全级的基础上，在便携式设备与固定设备之间实现无线连接。

蓝牙技术的主要特点是稳健，低功耗和低成本。

蓝牙规范定义了一个统一的结构，适用范围广的设备连接并相互沟通。

Bluetooth technology has achieved global acceptance such that any Bluetooth enable device, almost everywhere in the world, can connect to other Bluetooth enabled devices in proximity. Bluetooth enabled electronic devices connect and communicate wirelessly through short-range, ad hoc（特别）networks known as piconets Each device can simultaneously communicate with up to seven other devices within a single piconet. Each device can also belong to several piconets simultaneously. Piconets are established dynamically and automatically as Bluetooth enabled devices enter and leave radio proximity.蓝牙技术已取得全球认可，使得任何支持蓝牙的设备，几乎在世界各地，可以连接到其他支持蓝牙的邻近装置。

通信英语(翻译短文)

1.If we consider binary transmission, the complete information about a particular message will always be obtained by simply detecting the presence or absence of the pulse. By comparison, most other forms of transmission systems convey the message information using the shape, or level of the transmitted signal; parameters that are most easily affected by the noise and attenuation introduced by the transmission path. Consequently there is an inherent advantage for overcoming noisy environments by choosing digital transmission.研究二进制信号的传输可见，只要简单的区判别脉冲的有和无，完美就获得了一条消息的全部信息。

相比之下，许多其他形式的传输系统是利用被传信号的波形或电平的高低来传送信息的，而这些参数又极易受到传输途径中的噪声和衰耗的影响。

因此选择数字传输系统在克服噪声环境的影响方面有其固有的优势。

2.The reader may ask, how does the demultiplexer know which group of 8-digits relates to channel 1,2, and so on? Clearly this is important! The problem is easily overcome by specifying a frame format, where at the start of each frame a unique sequence of pulses called the frame code, or synchronization word, is placed so at to identify the start of the frame. A circuit of the demultiplexer is arranged to detect the synchronization word, and thereby it knows that the next group of 8-digits corresponds to channel 1.读者也许会问，分路设备怎么会知道哪一组8位码对应于第1路、第2路及其他各路呢？显然这是很重要的。

通信工程专业英语翻译

通信工程专业英语翻译Part B1. Desktop systems allow remote users to share CAD files as well as other office documents created in spreadsheets, word processors, presentation packages, etc.桌面体系让长途用户能够或许共享运算机关心设计档案以及其他一些制造在电子表格、文字处理器、图像法度榜样包中的办公室文件。

3. At the World’s Fair 1964, AT&T demonstrated its first videophone, a desktop (or countertop)configuration that provided low quality images using analog technology.在1964年的世界博览会上，美国德律风电报公司展现了其首款可视德律风-一种桌面（或台式）机械。

因为应用的是仿照技巧，它供给的图像质量不高。

5. Today, systems level implementers have to live within the constraints of standards-based compression algorithms, since standards are the foundation for interoperability, which in the communications field is absolutely necessary.现在，体系程度的操作者不得不受限于基于标准的紧缩算法，因为标准时互用性的差不多。

而在通行范畴，互用性是极其重要的。

Part A1. The word “multimedia”is being used to describe a mixture of hardware, software and applications, with a consequent confusion in people’s mind as to what it is.“多媒体”一词被用来描述硬件、软件及应用的混淆体。

通信英语课后短语翻译

通信英语课后短语翻译1.PCM原理抽样量化与编码:sampling, quantizing and coding 话路:speech channel幅值: amplitude value抽样频率: sampling frequency抽样速率: sampling rate脉冲流: stream of pulses重复率: repetition rate编码过程: coding process模拟信号: analog signal传输质量: transmission quality数字通信: digital communication数字传输: digital transmission含噪声的环境: noisy environment传输路由: transmission path信噪比:signal-to-noise ratio信号电平:signal levels噪声功率: noise power地面系统: terrestrial system二进制传输: binary transmission反向操作: reverse operation8-位码序列: 8-digit sequence接受端: receiving terminal帧格式:frame format同步字:synchronization word2.异步串行数据传输串行接口serial interface显示终端CRT terminal发送器与接收器transmitter and receiver数据传输data transmission数据流data stream闲置状态the idle state传号电平mark level空号电位space level起始位start bit停止位stop bitT秒的持续时间duration of T seconds奇偶校检位parity bit错误标志error flag传输错误transmission error下降沿falling edge符号间的空格intersymbol space接收机的定时receiver timing本地时钟local clock磁带magnetic tape控制比特control bit逻辑1电平logical 1 level二进制数据binary data明显的缺点obvious disadvantage3.ISO联网标准联网技术networking technology国际标准化组织the international organization for standardization 参考模型reference model数据分组data pakects应用程序application program网络媒体network media分层layering硬件和软件hardware and software表示层the presentation layer传输层the transport layer数据链路层the data link layer网络服务network services文件接入file-access数据格式the data format主机host协议protocol连接connectivity逻辑选址logical addressing4.互联网网络资源：network resource信息服务：information services远程终端：remote terminals互联的系统：interconnected systems 命令：command电子邮件：electronic mail主机：host无线信道：wireless channels搜索工具：searching tools用户界面：user interface存取：access文本信息：textual messages协议：protocol超文本协议：hypertext protocol5.光纤通信介绍光纤通信:optical fiber communications 光源：light source波长：wavelength激光器：laser色散：dispersion传输介质：transmission medium多模光纤：multi-mode fiber长途干线：long-haul trunks单模光纤：singer-mode fiber带宽：bandwidth带宽用户：wideband subscriber纤维光学：fiber-optics商用技术：commercial technology门限电流：threshold current光检测器：photodetector波分复用：wavelength multiplexing纤维光网络：fiber-optic network视频带宽：video bandwidth6.同步数字系列同步数字系统：synchronous digital hierarchy 国际标准：international standard信号格式：signal format网络节点接口：network node interface支路信号：tributary signals数字交叉连接：digital cross-connection网络管理：network management网络维护：network maintenance网络运营者：network operators传输速率：transmission rate支路映射：tributary mapping灵活性：flexibility用户业务：subscriber services覆盖层：overlay levels制造商：manufacturer同步传输帧：synchronous transmission frame线路终端复用器：line terminal multiplexer分插复用器：add-drop multiplexer再生中继器：regenerator灵敏度：sensitivity虚容器：virtual container成帧字节：framing bytes段开销：section overhead端到端传输：end-to-end transmission误码监视：error monitoring信号处理节点：signal processing nodes净负荷：payload指针：pointer7.波分复用对光特性的理解：the understanding of the property of light 基本重要性：the fundamental important想象今天的通信系统：to imagine the communication system of today 光的高速公路：the highway of light巨量的信息：the massive amount of information采用通信新技术：to adopt new communication technology 大量的视频信息：the large amounts of video information波分复用：the wave divide multiplexing只发送单个波长：to send only one wavelength传输大量的波长：to transmit a large amount of wavelength 无差错传输：the error-free transmission自愈特性：the self-healing properties直接接入光网络：to access directly to the optical network视频信息：the video information8.蜂窝式移动电话系统蜂窝式移动电话：cellular mobile telephone服务性能：services performance频谱：frequency spectrum频带：frequency band微处理器：microprocessor移动手机：mobile unit广播业务：broadcast service天线：antenna子系统：subsystems移动用户：mobile subscriber服务能力：service capability利用率：utilization带宽：bandwidth单边带：single-sideband扩频：spread spectrum大规模集成电路：large scale integrated circuits 蜂窝点：cellular site蜂窝交换机：cellular switch无线机架：radio cabinet呼叫处理：call processing9.全球移动通信系统个人通信personal communication通信标准communication standards固定电话业务fixed telephone services网络容量network capability移动交换中心mobile switching center国际漫游international roaming宽带业务broadband services接口转换interface conversion频谱分配frequency allocation模拟方式analogue mode蜂窝通信原理cellular communication principle拥塞jamming蜂窝裂变cellular splitting基站base station寄存器register收费功能billing function接入方法access method突发脉冲传输方式bursty transmission mode开销信息overhead information切换算法handover algorithms短消息服务short message services技术规范technical specification10.3G移动电话the mobile telephone第三代移动业务the third generation mobile service 互联协议the Internet Protocol无线通信the wireless communication手机the handset全球漫游the global roaming无线标准the wireless standard蜂窝点the cell site峰值数据速率the peak data rate平均吞吐量the average throughput下载the download多址接入the multiple access扩频技术the spread spectrum technology时隙the timeslot11.电路交换和分组交换电路交换circuit switching分组交换packet switching报文交换message switching子网subnet信头header目的地址destination address误差控制error control存储转发方式store-and-forward manner突发性bursty传输时延transmission delay中间交换设备intermediate switching equipment 交换技术switching technique返回信号return signal报文处理机message processor给定最大长度given maximum length信息转移information transfer随机性random专用电路dedicated circuit电路利用率channel utilization12.A TM异步转移模式异步转移模式asynchronous逻辑信道logical channel虚电路virtual circuits虚路径virtual paths建议recommendation网络层network level业务与应用层service and application虚连接virtual connection信息高速公路information superhighway 点播电视video-on-demand统计复用statistical multiplexing数字化的信息digital information标识符identifier协议protocols网络节点network node宽带网broadband networkATM论坛ATM forum面向未来future-proofed图象编码image encoding虚拟专用网virtual private network数据处理data processing17.NGN信息技术the information technology数据包the data package电信行业the telecommuniccation industry 固定网业务tge fixed-network services网络运营商the network operaters接入技术the access technology核心网the coer network互联协议the internet protocol基于分组的网络the packet-based network 业务提供商the service provider管理层the management level网关the gateway传输平台the transport platform路由器the router交换机the switch增值业务the value-added services千兆字节the gigabyte无线连the wireless connection可编程器件the programmable devices媒体网关the media gateway。

通信工程专业英语文献翻译

Multi-Code TDMA (MC-TDMA) for Multimedia Satellite Communications用于多媒体卫星通信的MC--TDMA（多码时分多址复用）R. Di Girolamo and T. Le-NgocDepartment ofa Electricl and Computer Engineering - Concordia University1455 de Maisonneuve Blvd. West, Montreal, Quebec, Canada, H3G 1M8 ABSTRACT摘要In this paper, we propose a multiple access scheme basedon a hybrid combination of TDMA and CDMA,在这篇文章中，我们提出一种基于把时分多址复用和码分多址复用集合的多址接入方案。

referred toas multi-code TDMA (MC-TDMA). 称作多码—时分多址复用The underlying TDMAframe structure allows for the transmission of variable bitrate (VBR) information,以TDMA技术为基础的帧结构允许传输可变比特率的信息while the CDMA provides inherentstatistical multiplexing.和CDMA提供固有的统计特性多路复用技术The system is studied for a multimediasatellite environment with long-range dependentdata traffic,and VBR real-time voice and video traffic研究这个系统是为了在远程环境下依赖数据传输和可变比特率的语音和视频传输的多媒体卫星通信系统 . Simulationresults show that with MC-TDMA, the data packetdelay and the probability of real-time packet loss can bemaintained low. 仿真结果表明：采用MC-TDMA的多媒体卫星通信，数据包延时和实时数据丢失的可能性可以保持很低。

通信英语缩写简写翻译集锦

通信英语缩写简写翻译集锦AA, Asub A-interface A接口AC Alternating Current 交流AC Access Class (C0 to C15) 接入级别（C0到C15）ACCH Associated Control Channel 随路控制信道ACELP Algebraic code excitation linear prediction 代数码激励线性预测ACOM Antenna Combiner 天线合路器AGCH Access Grant Channel 接入允许信道AM/CM Administration Module/ Communication Module 管理和通信模块ANSI American National Standard Institute 美国国家标准组织APC Automatic Power Control 自动功率控制API Application Program Interface 应用程序接口APL Advanced Phase Locking 高级时钟锁相ARFCN Absolute Radio Frequency Channel Number 绝对射频信道号ASIC Application Specific Integrated Circuit 专用集成电路AuC Authentication Center 鉴权中心BBA BCCH Allocation BCCH分配BAM Back Administration Module 后管理模块BCC BTS Color Code 基站色码BCCH Broadcast Control CHannel 广播控制信道BCF Base Control Function 基本控制功能BCH Broadcast channel (transport channel) 广播信道BER Bit Error Rate 误码率BHCA Busy Hour Call Attempt 忙时尝试呼叫BIE Base station Interface Equipment (board) 基站接口设备（板）BIOS Basic Input Output System 基本输入输出系统BITS Building Integrated Timing Supply 大楼综合定时供给系统BM Basic Module 基本模块BP Burst Pulse 突发脉冲BQ Bad Quality 质量差BS Base Station 基站BS1 Abis Interface Abis接口BSC Base Station Controller 基站控制器BSIC Base Station Identity Code 基站识别码BSMU Base Station Interface Unit 基站接口单元BSS Base Station Subsystem 基站子系统BSSAP Base Station Subsystem Application Part 基站子系统应用部分BSSGP Base Station Subsystem GPRS Protocol 基站系统GPRS协议BSSMAP Base Station Subsystem Management Application Part 基站子系统管理应用部分BSSOMAP Base Station Subsystem Operation and Maintenance Application Part 基站子系统操作与维护应用部分BTS Base Transceiver Station 基站收发信台BTSM Base Transceiver Station Management BTS管理BVC BSSGP Virtual Connection BSSGP虚拟连接CCA Cell Allocation 小区分配CAMEL Customized Applications for Mobile network Enhanced Logic 移动网络增强逻辑的客户化应用CBA Cell Bar Access 小区禁止接入CBC Cell Broadcast Center 小区广播中心CBCH Cell Broadcast CHannel 小区广播信道CBCCH Cell Broadcast Control Channel 小区广播控制信道CBQ Cell Bar Qualify 小区禁止限制CBSM Cell Broadcast Short Message 小区广播短消息CC Country Code 国家码CC Calling Control 呼叫控制CC Connection Confirm 呼叫控制CCB Call Control Block 呼叫控制块CCBS Completion of Calls to Busy Subscribers 遇忙回呼CCCH Common Control Channel 公共控制信道CCH Control Channel 控制信道CCS Common Channel Signaling 共路信令方式CD Call Deflection 呼叫偏移CDB Cell Broadcast Database 小区广播数据库CDU Combining and Distribution Unit 合分路单元CELP Code Excited Linear Prediction 码激励线性预测CGI Cell Global Identity 小区全球识别码CI Cell Identity 小区识别CIC Circuit Identify Code 电路识别码CIC Carrier Interface Controller board 载频接口控制器CIR Carrier to Interference Ratio 载干比CKSN Ciphering Key Sequence Number 密钥序列号CKV Clock Drive board 时钟驱动板CM Connection Management 接续管理CPU Central Processing Unit 中央处理单元CR Connection Request 连接请求CRC Cyclic Redundancy Check 循环冗余校验CRO Cell Reselect Offset 小区重选偏移CS Coding Scheme （信道）编码方式CS-1 Code Scheme-1 编码模式－1（9.05kbit/s）CS-2 Code Scheme-2 编码模式－2（13.4kbit/s）CS-3 Code Scheme-3 编码模式－3（15.6kbit/s）CS-4 Code Scheme-4 编码模式－4（21.4kbit/s）CTN Central Switching Network Board 中央交换网板DDB DataBase 数据库DBF Database File 数据库文件DBMS Database Management System 数据库管理系统DC Direct Current 直流DCCH Dedicated Control Channel 专用控制信道DCL Diagnostic Control Link 诊断控制链路DDN Digital Data Network 数字数据网DL Downlink 下行链路DLC Data Link Connection 数据链路连接DLCEP Data Link Connection End Point 数据链路连接端点DLCEPI Data Link Connection End Point Identifier 数据链路连接端点标识DLCI Digital Link Connection Identity 数据链路连接标识DNS Domain Name Server 域名服务器DPC Destination (Signaling) Point Code 目的信令点编码DRDBMS Distributed Relational DBMS 分布式关系数据库管理系统DRX Discontinuous Reception (mechanism) 不连续接收DSC Downlink Signaling fault Count 下行信令故障计数DSP Digital Signal Processor 数字信号处理器DTAP Direct Transfer Application Part 直接传输应用部分DTMF Dual Tone Multi-frequency 双音多频（收号器）DTX Discontinuous transmission (mechanism) 不连续发送（机制）EE-Abis Enhanced Abis 增强型AbisE3M E3 Sub-Multiplexer 增强型E1子复用设备EA Early Allocation 预分配EAC External Alarm Collection 外部告警采集EC Emergency Call 紧急呼叫ECSC Early Classmark Sending Control 早期类标发送控制ECT Explicit Call Transfer 显示呼叫转移EDU Enhanced Duplexer Unit 增强型双工单元EFR Enhanced full rate speech code 增强型全速率语音编解码EIR Equipment Identity Register 设备识别寄存器EM Extended Measurement 扩展测量EMC Electromagnetic Compatibility 电磁兼容性EST Establishment 建立ETS European Telecommunication Standard 欧洲电信标准ETSI European Telecommunication Standard Institute 欧洲电信标准组织FFACCH Fast Associated Control CHannel 快速随路控制信道FBC Photoelectric Conversion Board 光电转换板FBI Optical Fiber Interface Board 光接口板FCCH Frequency Correction CHannel 频率校正信道FCS Frame Check Sequence 帧校验序列FDMA Frequency Division Multiple Access 频分多址FH Frequency Hopping 跳频FIR Finity Impulsion Response 有限冲击响应FN Frame Number 帧号FPU Frame Processing Unit 帧处理单元FR Frame Relay 帧中继FTAM File Transfer Access and manipulation 文件传输、接入及使用FTC Full Rate Transcoder 码变换板FTP File Transfer Protocol 全速率码变换器FUC Frame Unit Controller 帧单元控制器FUL Radio Signaling Link 无线信令链路GG-Abis GPRS Abis GPRS AbisGALM Alarm board 告警板GCKS Clock source 时钟板GCTN Central switching Network board 中心交换网板GEMA Emergency Message Automatic Transmission System 双机倒换板GFBI Fiber Interface board 光纤接口板GGSN Gateway GPRS Support Node 网关GPRS支持节点GLAP LAPD Protocol Process board LAPD协议处理板GMC2 Inter-Module Communication board 模块通信板GMCC Module Communication and Control board 模块通信控制板GMEM Memory board 数据库接口板GMM GPRS Mobility Management GPRS移动性管理GMPU Main Processing Unit 主处理单元GMSC Gateway Mobile Switching Center 关口局GMSK Gaussian Minimum Shift-frequency Keying 高斯滤波最小移频键控GNET Intra-module switching network board 交换网板GNOD Node Communication Board 节点通信板GOPT Local Optical Interface Board 光纤通信板GPRS General Packet Radio Service 通用分组无线业务GPS Global Position System 全球定位系统GPWS GSM Secondary Power board 二次电源板GSM，GSM900，GSM1800 Global System for Mobile communications 全球移动通信系统，900MHz的GSM系统，1800MHz的GSM系统GSN GPRS Support Node GPRS支持节点GSNT GSM Signaling Switching Network Board 信令交换网板GT Global Title 全局码GTP GPRS Tunnelling Protocol GPRS隧道协议HHC/HY COM Hybrid Combiner 混合桥型合路器HCS Hierarchical Cell Structure 小区分层结构HDLC High level Data Link Control 高级数据链路控制HDSL High speed Digital Subscriber Line 高速数字用户线HLR Home Location Register 归属位置寄存器HO Handover 切换HPA High magnification Power Amplifier board 高增益功放板HSC Hot Swap Controller 热倒换控制器HSN Hopping Sequence Number 跳频序列号HW Highway 高速通路IID IDentification/IDentity 识别IEC International Electrotechnical Commission 国际电工委员会IMEI International Mobile station Equipment Identity 国际移动终端设备标识IMSI International Mobile Station Identity 国际移动用户识别码IND Indication 指示IOMU iSite Operation and Maintenance Unit 操作维护单元板IP Internet Protocol 互联网协议ISDN Integrated Services Digital Network 综合业务数字网ISO International Standard Organization 国际标准化组织ISR Interrupt Service 中断服务程序ISUP Integrated Services Digital Network User Part/ISDN User Part （七号信令之）ISDN用户部分ITU International Telecommunication Union 国际电信联盟ITU-T International Telecommunication Union - Telecommunication Standardization Sector 国际电信联盟-电信标准部IWF Inter-working Function 互连功能J- -K- -LL2ML Layer 2 Management Link 层2管理链路L3MM Layer-3 Mobility Management 层三移动管理LA Location Area 位置区LAC Location Area Code 位置区码（LAC）LAI Location Area Identity 位置区标识LAP Link Access Protocol 协议处理板LAPD Link Access Protocol on the D-channel D信道上的链路访问协议LAPDMAIL LAPD Mail Box LAPD邮箱LAPDm Link Access Protocol on the Dm channel Dm信道上的链路访问协议LLC Logical Link Control 逻辑链路控制LMT Local Maintenance Terminal 本地维护终端LNA Low Noise Amplifier 低噪声放大器LPN7 Common Channel Signaling Processing Board 公共信道信令处理板MMA Mobile Allocation 移动台（频率）分配MAC Media Access Control 媒质接入控制MAIO Mobile Allocation Index Offset 移动分配索引偏移MAP Mobile Application Part 移动应用部分MBR Multiband Report 多频报告MCC Mobile Country Code 移动国家码MCK Main ClocK board 主时钟板MCP Multiple Communication-Protocol Processor 多重通信协议处理器MDC Message Discrimination 消息鉴别MDSL Medium Bit-rate Digital Subscriber Loop 中速数字用户环线MDT Message Distribution 消息分配ME Mobile Equipment 移动设备MFU Microcell Frame Unit 微蜂窝帧处理单元MM Mobility Management 移动性管理MMU Multiplication and Management Unit 复用管理单元MNC Mobile Network Code 移动网号MNS Mobile Network Signaling 移动网信令MR Measurement Result 测量结果MR Measurement Report 测量报告MRP Multiple Reuse Pattern 多重复用方式MRT Message Routing 消息路由MS Mobile Station 测量报告MSC Mobile services Switching Centre, Mobile Switching Centre 移动交换中心MSISDN Mobile Station International ISDN Number 移动台国际ISDN号码MSM MSC Subrate channel Multiplexer MSC侧子复用板MT Mobile Terminal 移动终端MTBF Mean Time Between Failure 平均无故障时间MTP Message Transfer Part 消息传输部分NNC Network Control 网络控制NCC Network Color Code 网络色码NCH Notification Channel 通知信道NE Network Equipment 网络设备NM Network Management 网络管理NS Network Service 网络服务NSE Network Service Entity 网络服务实体NSS Network SubSystem 网络子系统OO&M, OM Operations & Maintenance 操作与维护OACSO Off Air Call Set up 不占用空中通道的呼叫启动OAM Operation Administration and Maintenance 运行管理和维护OMAP Operation and Maintenance Application Part 操作维护应用部分OMC Operations & Maintenance Centre 操作维护中心OML Operation and Maintenance Link 操作与维护链路OMU Operations & Maintenance Unit (board) 操作维护单元（板）OOP Object Oriented Programming 面向对象的程序设计OPC Originating Point Code 源信令点编码OPT Optic Interface board 光纤通信板OS Operation System 操作系统OSI Open System Interconnection 开放系统互连模型PPA Power Amplifier 功率放大器PAGCH Packet Access Grant Channel 分组接入允许信道PBCCH Packet Broadcast Control Channel 分组广播控制信道PBGT Power Budget 功率预算PBU Power Boost Unit 功率增强单元Pb Pb Interface Pb接口PbSL PCU-BSC Signaling Link PCU-BSC间信令链路PCCCH Packet Common Control Channel 分组公共控制信道PCH Paging CHannel 寻呼信道PCIC Packet Circuit Identity Code 分组电路标识码PCM Pulse-Code Modulation 脉冲编码调制PCU Packet Control Unit 分组控制单元PD Protocol Discrimination 协议识别码PDCH Packet Data Channel 分组数据信道PDH Plesiochronous Digital Hierarchy 准同步数字系列PDN Packet Data Network 分组数据网PDP Packet Data Protocol 分组数据协议PDTCH Packet Data Traffic Channel 分组业务数据信道PI Peripheral Interface 外设接口部件PIN Personal Identity Number 个人识别码PLL Phase Locked Loop 锁相环路PLMN Public Land Mobile Network 公用陆地移动网络PMU Power and Environment Monitoring Unit 电源环境监测板PNCH Packet Notification Channel 分组通知信道POMU Packet Operation & Maintenance Unit 分组操作维护单元PON Passive Optical Network 无源光网络PPCH Packet Paging Channel 分组寻呼信道PRACH Packet Random Access Channel 分组随机接入信道PSDN Public Switched Data Network 公用数据交换网PSI Packet System Information 分组系统消息PSK Phase Shift Keying 相移键控PSTN Public Switched Telephone Network 公用电话交换网PSU Power Supply Unit 供电单元PT Penalty Time 惩罚时间PTCCH Packet Timing advance Control Channel 分组定时提前控制信道PTM Point To Multipoint 点到多点PTM-M Point To Multipoint Multicast 点对多点广播PTM-SC Point to Multipoint Service Center 点到多点数据服务中心PTP Point To Point 点对点PWC Secondary Power Supply Board 电源控制板QQoS Quality of Service 业务质量RRACH Random Access Channel 随机接入信道RE Reestablishment 呼叫重建RF Radio Frequency 射频RLC Radio Link Control 无线链路控制RLM Radio Link Management 无线链路管理RPE-LTP Regular Pulse Excitation-Long Term Prediction 规则脉冲激励-长期预测RPPU Radio Packet Process Unit 无线分组处理单元RR Radio Resource 无线资源RSA Rivest-Shamir-Adleman 通用关键子密码方法RSL Radio Signaling Link 无线信令链路RTE Radio Test Equipment 天线测试设备RX Receiver/Reception 收信机/接收RXLEV Received signal level 接收信号等级RXQUAL Received Signal Quality 接收信号质量SSABM Set Asynchronous Balanced Mode 置异步平衡模式SACCH Slow Associated Control Channel 慢速随路控制信道SACCH/C4 Slow Associated Control Channel/SDCCH/4 慢速随路控制信道/SDCCH/4SACCH/C8 Slow Associated Control CHannel/SDCCH/8 慢速随路控制信道/SDCCH/8SACCH/T Slow Associated Control CHannel/Traffic channel 慢速随路控制信道/业务信道SACCH/TF Slow Associated Control Channel/Traffic channel Full rate 慢速随路控制信道/全速率业务信道SAP Service Access Point 服务接入点SAPI Service Access Point Identifier 业务接入点标识SCCP Signaling Connection Control Part 信令连接控制部分SCH Synchronization CHannel 同步信道SCMG SCCP Management SCCP管理SCU Simple combining Unit 简单合路单元SDCCH Stand-alone Dedicated Control CHannel 独立专用控制信道SDH Synchronous Digital Hierarchy 同步数字系列SDU Service Data Unit 业务数据单元SGSN Serving GPRS Support Node 服务GPRS支持节点SID Silence Descriptor 静噪指示SIG Signaling 信令SIM Subscriber Identity Module 用户识别卡SITE Site 站点SLM Signaling Link Management 信令链路管理SLS Signaling Link Selection 信令链路选择码SM Sub-Multiplexer Interface 子复用板SM-SC Short Message - Service Center 短消息中心SMBCB Short Message Service Cell Broadcast 短消息业务小区广播SMC Short Message Center 短消息中心SMI Sub-Multiplexer Interface 子复用板SMS Short Message Service 短消息业务SMS-GMSC Short Message Service - Gateway MSC 短消息关口MSC SMS-IWMSC Short Message Service Interworking MSC 短消息互联MSC SMSCB Short Message Service Cell Broadcast 短消息小区广播SMUX Sub-Multiplexer 子复用器SNDCP SubNetwork Dependent convergence Protocol 子网相关的收敛协议SOR Support Optimization Routing 支持优选路由SP Signaling Point 信令点SRM Signaling Route Management 信令路由管理SS Supplementary Service 补充业务SS7 Signalling System No.7 七号信令SSN SubSystem Number 子系统号STM Signaling Traffic Management 信令业务管理STP Signaling Transfer Point 信令转接点TTA Timing Advance 定时提前量TAI Timing Advance Index 时间提前量索引TBF Temporary Block Flow 临时数据块流TC Transcoder 码变换器TCH Traffic Channel 业务信道TCH/F A full rate TCH 全速率业务信道TCH/F2.4 A full rate data TCH (2.4kbit/s) 全速率数据业务信道（2.4kbit/s）TCH/F4.8 A full rate date TCH (4.8kbit/s) 全速率数据业务信道（4.8kbit/s）TCH/F9.6 A full rate data TCH (9.6kbit/s) 全速率数据业务信道（9.6kbit/s）TCH/FS A full rate Speech TCH 全速率话音业务信道TCI Terminal Interface board 终端接口板TCP Transmission Control Protocol 传输控制协议TCSM TransCoder & Sub-Multiplexer 码变换与子复用单元TDMA Time Division Multiple Access 时分多址TE Terminal Equipment 终端设备TEI Terminal Equipment Identifier 终端设备识别码TES Transmission Extension power Supply unit 传输扩展供电单元TEU Transmission Extension Unit 传输扩展单元TFI Transport Format Indicator 传输格式指示TFO Tandem Free Operation 免汇接运营TLLI Temporary Link Level Identity 临时链路等级标识TMSC Tandem Mobile Switching Centre 汇接移动交换中心TMSI Temporary Mobile Subscriber Identifier 临时移动用户标识符TMU Timing/Transmission and Management Unit 定时/传输管理单元TN Timeslot Number 时隙号TNI Terminal Network Interface 终端网络接口部件TO Temporary Offset 临时偏移TRAU Transcoder & Rate Adaptation Unit 码变换器/速率适配单元TRX Transceiver (board) 收发信机TS Timeslot 时隙TSC Training Sequence Code 训练系列号(编码）TUP Telephone User Part(SS7) 电话用户部分UUA Unnumbered Acknowledge 无编号证实UDP User Datagram Protocol 用户数据报协议UDT Unit Data 单位数据UI Unnumbered Information (frame) 无编号信息帧Um 空中接口USF Uplink State Flag 上行链路状态标识USSD Unstructured Supplementary Service Data 非结构化补充业务数据VVAD Voice Activity Detection 话音激活检测VBS Voice Broadcast Service 话音广播呼叫业务VEA Very Early Allocation 很早分配VGCS Voice Group Call Service 话音组呼业务VLR Visitor Location Register 拜访用户位置寄存器VM Voice Mailbox 语音邮箱VSAT Very Small Aperture Terminal 甚小天线卫星地球站WWDT Watchdog Timer 看门狗WS Workstation 操作台XxDSL x Digital Subscriber Line x数字用户线Y- -Z。

通信专业英语作文模板

通信专业英语作文模板英文回答：1. What is the definition of communication?Communication is the process of effectively conveying a message from one person or group to another, with theintent of creating shared understanding. It involves the exchange of information, thoughts, feelings, and ideas through various channels, such as speaking, writing, gestures, and visual cues.2. What are the different types of communication?Verbal communication: Spoken or written words used to convey a message.Nonverbal communication: Body language, facial expressions, tone of voice, and eye contact that convey messages without words.Intrapersonal communication: Communication with oneself, involving internal thoughts, feelings, and self-reflection.Interpersonal communication: Communication between individuals, including conversations, discussions, and relationships.Mass communication: Dissemination of a message to alarge audience through media such as television, radio, and print.3. What are the key elements of effective communication?Clarity: The message is easy to understand and unambiguous.Accuracy: The message is truthful and represents the intended meaning.Relevance: The message is pertinent to the recipient's needs and interests.Timeliness: The message is delivered at an appropriate time.Completeness: The message includes all necessary information.Conciseness: The message is brief and to the point.Empathy: The message demonstrates understanding of the recipient's perspective.Feedback: The sender receives feedback to ensure the message has been received and understood.4. What are the barriers to effective communication?Language differences: Misunderstandings due to linguistic barriers.Cultural differences: Varying communication styles and protocols across cultures.Personal biases: Preconceived notions or prejudices that influence perception.Noise: Distractions that interfere with the transmission or reception of the message.Lack of attention: The recipient is not paying enough attention to the message.Emotional barriers: Strong emotions that hinder clear thinking and communication.5. What are the strategies for improving communication skills?Active listening: Paying full attention to the speaker and demonstrating comprehension.Effective speaking: Clearly and confidently expressing oneself with appropriate tone and body language.Feedback and clarification: Seeking and providing feedback to ensure understanding.Cultural sensitivity: Being aware of and adapting to different communication styles across cultures.Emotional management: Controlling emotions and maintaining a professional demeanor.Written communication skills: Writing emails, reports, and other documents effectively and clearly.中文回答：1. 什么是沟通？沟通是有效地将信息从一个人或群体传达给另一个人或群体，以期达成共同理解的过程。

通信英语__简写翻译

編號縮略語英文全稱中文解釋說明MSCBSC 移動通信論壇,d$k)l#g(O4N3X1A/DAnalogue to Digital Converter 模數轉換無#T,@8k4}8K#b0F2A3Authetication algorithm A3A3認證演算法無3N"x5`+B*Q.m8z6~"e3A38A single algorithm performing the functions of A3 and A8執行A3和A8功能的單個演算法無/H$L!s8E7kMSCBSC移動通信論壇4A5/1Encryption algorithm A5/1A5/1加密演算法無)S%v8c,h)R#E9J!d5A8Ciphering Key generating algorithm A8產生A8演算法的加密密匙無6V/V)@;_$x&T3X5g:6AAAAuthenticatio n，Authorization，Accounting鑒權，認證，清算無8B9j4~2G+c-K!k | 國內領先的通信技術論壇7ABAccess Burst 接入突發無mscbsc 移動通信論壇擁有30萬通信專業人員，超過50萬份GSM/3G等通信技術資料，是國內領先專注於通信技術和通信人生活的社區。

a9O5B;{7G:}&Z%z8Abis interfaceAbis interfaceAbis介面基站與基站控制器之間…mscbsc 移動通信論壇擁有30萬通信專業人員，超過50萬份GSM/3G等通信技術資料，是國內領先專注於通信技術和通信人生活的社區。

;X0}+v4^4Z:]&|9ACAuthentication Centre鑒權中心無4t9u$q!^2E9S9q | 國內領先的通信技術論壇10 AC Application Context 應用場景無/o6@2L)`"v5f11 AC Access Class(C0 to C15) C0至C15接入類型無移動通信,通信工程師的家園,通信人才,求職招聘,網路優化,通信工程,出差住宿,通信企業黑名單+c(t%f!N.]5~"w-o12 AC Access Controller 用戶接入認證點WLAN用戶接入認證…5}$j0^!`!u$QMSCBSC 移動通信論壇13 ACC Automatic Congestion Control 自動擁塞控制無| 國內領先的通信技術論壇/]%`,|&x1x,i14 ACCH Associated Control Channel 隨路控制通道無| 國內領先的通信技術論壇'u(V%?2k+z.W.s2X6F+J%z-N15 ACK ACKnowledgement 確認用於信令+O;X5Q(q(G,|16 ACL Asynchron ous Connectionless Link 非同步無連接無']1y*J(W"u$W#?#M移動通信,通信工程師的家園,通信人才,求職招聘,網路優化,通信工程,出差住宿,通信企業黑名單17 ACM Address Complete Message 地址完成消息無7O'l(p!Y'd!D4u-E移動通信,通信工程師的家園,通信人才,求職招聘,網路優化,通信工程,出差住宿,通信企業黑名單18 ACM Accumulated Call Meter 累計呼叫記錄無%E5S7B:d's!k%L*Q!B19 ACP Adjacent Channel Power 鄰道功率無移動通信,通信工程師的家園,通信人才,求職招聘,網路優化,通信工程,出差住宿,通信企業黑名單,p'_8q)|1g&Y1R20 ACU Antenna Combining Unit 天線組合(耦合)單元無| 國內領先的通信技術論壇"]*u,_ {8v,C [/r0s 21 ADC Administration Centre 管理中心無-k,n"O)q't&j | 國內領先的通信技術論壇22 ADPCM Adaptive Differential Pulse Code Modulation 自適應差分脈衝編碼調製無MSCBSC 移動通信論壇+F#n/H"Z6]1k#m*H23 AE Application Entity 應用實體無,@"J+c%V$n+E#L7I&Q+o.{24 AEC Acoustic Echo Control 回聲控制無#u;X$g0e2t n&v;zmscbsc 移動通信論壇擁有30萬通信專業人員，超過50萬份GSM/3G等通信技術資料，是國內領先專注於通信技術和通信人生活的社區。

中文翻译Wireless+communications(无线通信)5-10页

1.3 Technical IssuesMany technical challenges must be addressed to enable the wireless applications of the future. These challenges extend across all aspects of the system design. As wireless terminals add more features, these small devices must incorporate multiple modes of operation to support the different applications and media. Computers process voice, image, text, and video data, but breakthroughs in circuit design are required to implement the same multimode operation in a cheap, lightweight, handhe ld device. Since consumers don’t want large batteries that frequently need recharging, transmission and signal processing in the portable terminal must consume minimal power. The signal processing required to support multimedia applications and networking functions can be power-intensive. Thus, wireless infrastructure-based networks, such as wireless LANs and cellular systems, place as much of the processing burden as possible on ﬁxed sites with large power resources. The associated bottlenecks and single points-of-failure are clearly undesirable for the overall system. Ad hoc wireless networks without infrastructure are highly appealing for many ap plications due to their ﬂexibility and robustness. For these networks all processing and control must be performed by the network nodes in a distributed fashion, making energy-efﬁciency challenging to achieve. Energy is a particularly critical resource in networks where nodes cannot recharge their batteries, for example in sensing applications. Network design to meet the application requirements under such hard energy constraints remains a big technological hurdle. The ﬁnite bandwidth and random variations of wireless channels also requires robust applications that degrade gracefully as network performance degrades.Design of wireless networks differs fundamentally from wired network design due to the nature of the wireless channel. This channel is an unpred ictable and difﬁcult communications medium. First of all, the radio spectrum is a scarce resource that must be allocated to many different applications and systems. For this reason spectrum is controlled by regulatory bodies both regionally and globally. A regional or global system operating in a given frequency band must obey the restrictions for that band set forth by the corresponding regulatory body. Spectrum can also be very expensive since in many countries spectral licenses are often auctioned to the highest bidder. In the U.S. companies spent over nine billion dollars for second generation cellular licenses, and the auctions in Europe for third generation cellular spectrum garnered around 100 billion dollars. The spectrum obtained through these aucti ons must be used extremely efﬁciently to get a reasonable return on its investment, and it must also be reused over and over in the same geographical area, thus requiring cellular system designs with high capacity and good performance. At frequencies around several Gigahertz wireless radio components with reasonable size, power consumption, and cost are available. However, the spectrum in this frequency range is extremely crowded. Thus, technological breakthroughs to enable higher frequency systems with the same cost and performance would greatly reduce the spectrum shortage. However, path loss at these higher frequencies is larger, thereby limiting range, unless directional antennas are used.As a signal propagates through a wireless channel, it experiences randomﬂuctuations in time if the transmitter, receiver, or surrounding objects are moving, due to changing reﬂections and attenuation. Thus, the characteristics of the channel appear to change randomly with time, which makes it difﬁcult to design reliable systems with guaranteed performance. Security is also more difﬁcult to implement in wireless systems, since the airwaves are susceptible to snooping from anyone with an RF antenna. The analog cellular systems have no security, and one can easily listen in on conversations by scanning the analog cellular frequency band. All digital cellularsystems implement some level of encryption. However, with enough knowledge, time and determination most of these encryption methods can be cracked and, indeed, several have been compromised. To support applications like electronic commerce and credit card transactions, the wireless network must be secure against such listeners.W ireless networking is also a signiﬁcant challenge. The network must be able to locate a given user wherever it is among billions of globally-distributed mobile terminals. It must then route a call to that user as it moves at speeds of up to 100 Km/hr. The ﬁnite resources of the network must be allocated in a fair and efﬁcient manner relative to changing user demands and locations. Moreover, there currently exists a tremendous infrastructure of wired networks: the telephone system, the Internet, and ﬁber opt ic cable, which should be used to connect wireless systems together into a global network. However, wireless systems with mobile users will never be able to compete with wired systems in terms of data rates and reliability. Interfacing between wireless and wired networks with vastly different performance capabilities is a difﬁcult problem.Perhaps the most signiﬁcant technical challenge in wireless network design is an overhaul of the design process itself. Wired networks are mostly designed according to a layered approach, whereby protocols associated with different layers of the system operation are designed in isolation, with baseline mechanisms to interface between layers. The layers in a wireless systems include the link or physical layer, which handles bit transmissions over the communications medium, the access layer, which handles shared access to the communications medium,the network and transport layers, which routes data across the network and insure end-to-end connectivity and data delivery, and the application layer, which dictates the end-to-end data rates and delay constraints associated with the application. While a layering methodology reduces complexity and facilitates modularity and standardization, it also leads to inefﬁciency and performance loss due to the lack of a global design optimization. The large capacity and good reliability of wired networks make these inefﬁciencies relatively benign for many wired network applications, although it does preclude good performance of delay-constrained applications such as voice and video. The situation is very different in a wireless network. Wireless links can exhibit very poor performance, and this performance along with user connectivity and network topology changes over time. In fact, the very notion of a wireless link is somewhat fuzzy due to the nature of radio propagation and broadcasting. The dynamic nature and poor performance of the underlying wireless communication channel indicates that high-performance networks must be optimized for this channel and must be robust and adaptive to its variations, as well as to network dynamics. Thus, these networks require integrated and adaptive protocols at all layers, from the link layer to the application layer. This cross-layer protocol design requires interdiciplinary expertise in communications, signal processing, and network theory and design.In the next section we give an overview of the wireless systems in operation today. It will be clear from this overview that the wireless vision remains a distant goal, with many technical challenges to overcome. These challenges will be examined in detail throughout the book.1.4 CurrentWireless SystemsThis section provides a brief overview of current wireless systems in operation today. The design details of these system are constantly evolving, with new systems emerging and old ones going by the wayside. Thus, we will focus mainly on the high-level design aspects of the most common systems. More details on wireless system standards can be found in [1, 2, 3] A summary of the main wireless system standards is given in Appendix D.1.4.1 Cellular Telephone SystemsCellular telephone systems are extremely popular and lucrative worldwide: these are the systems that ignited the wireless revolution. Cellular systems provide two-way voice and data communication with regional, national, or international coverage. Cellular systems were initially designed for mobile terminals inside vehicles with antennas mounted on the vehicle roof. Today these systems have evolved to support lightweight handheld mobile terminals operating inside and outside buildings at both pedestrian and vehicle speeds.The basic premise behind cellular system design is frequency reuse, which exploits the fact that signal power falls off with distance to reuse the same frequency spectrum at spatially-separated locations. Speciﬁcally, the coverage area of a cellular system is divided into nonoverlapping cells where some set of channels is assigned to each cell. This same channel set is used in another cell some distance away, as shown in Figure 1.1, where Ci denotes the channel set used in a particular cell. Operation within a cell is controlled by a centralized base station, as described in more detail below. The interference caused by users in different cells operating on the same channel set is called intercell interference. The spatial separation of cells that reuse the same channel set, the reuse distance, should be as small as possible so that frequencies are reused as often as possible, thereby maximizing spectral efﬁciency. However, as the reuse distance decreases, intercell interference increases, due to the smaller propagation distance between interfering cells. Since intercell interference must remain below a given threshold for acceptable system performance, reuse distance cannot be reduced below some minimum value. In practice it is quite difﬁcult to determine this minimum value since both the transmitting and interfering signals experience random power variations due to the characteristics of wireless signal propagation. In order to determine the best reuse distance and base station placement, an accurate characterization of signal propagation within the cells is needed.Initial cellular system designs were mainly driven by the high cost of base stations, approximately one million dollars apiece. For this reason early cellular systems used a relatively small number of cells to cover an entire city or region. The cell base stations were placed on tall buildings or mountains and transmitted at very high power with cell coverage areas of several square miles. These large cells are called macrocells. Signal power was radiated uniformly in all directions, so a mobile moving in a circle around the base station would have approximately constant received power if the signal was not blocked by an attenuating object. This circular contour of constant power yields a hexagonal cell shape for the system, since a hexagon is the closest shape to a circle that can cover a given area with multiple nonoverlapping cells.Cellular systems in urban areas now mostly use smaller cells with base stations close to street level transmitting at much lower power. These smaller cells are called microcells or picocells, depending on their size. This evolution to smaller cells occured for two reasons: the need for higher capacity in areas with high user density and the reduced size and cost of base station electronics. A cell of any size can support roughly the same number of users if the system is scaled accordingly. Thus, for a given coverage area a system with many microcells has a higher number of users per unit area than a system with just a few macrocells. In addition, less power is required at the mobile terminals in microcellular systems, since the terminals are closer to the base stations. However, the evolution to smaller cells has complicated network design. Mobiles traverse a small cell more quickly than a large cell, and therefore handoffs must be processed more quickly. In addition, location management becomes more complicated, since there are more cells within agiven area where a mobile may be located. It is also harder to develop general propagation models for small cells, since signal propagation in these cells is highly dependent on base station placement and the geometry of the surrounding reﬂectors. In particular, a hexagonal cell shape is generally not a good approximation to signal propagation in microcells. Microcellular systems are often designed using square or triangular cell shapes, but these shapes have a large margin of error in their approximation to microcell signal propagation [9].All base stations in a given geographical area are connected via a high-speed communications link to a mobile telephone switching ofﬁce (MTSO), as shown in Figure 1.2. TheMTSO acts as a central controller for the network, allocating channels within each cell, coordinating handoffs between cells when a mobile traverses a cell boundary, and routing calls to and from mobile users. The MTSO can route voice calls through the public switched telephone network (PSTN) or provide Internet access. A new user located in a given cell requests a channel by sending a call request to the cell’s base station over a separate control channel. The request is relayed to theMTSO, which accepts the call request if a channel is available in that cell. If no channels are available then the call request is rejected. A call handoff is initiated when the base station or the mobile in a given cell detects that the received signal power for that call is approaching a given minimum threshold. In this case the base station informs theMTSO that the mobile requires a handoff, and the MTSO then queries surrounding base stations to determine if one of these stations can detect that mobile’s signal. If so then the MTSO co ordinates a handoff between the original base station and the new base station. If no channels are available in the cell with the new base station then the handoff fails and the call is terminated. A call will also be dropped if the signal strength between a mobile and its base station drops below the minimum threshold needed for communication due to random signal variations.The ﬁrst generation of cellular systems used analog communications, since they were primarily designed in the 1960’s, before digital communications became prevalent. Second generation systems moved from analog to digital due to its many advantages. The components are cheaper, faster, smaller, and require less power. V oice quality is improved due to error correction coding. Digital systems also have higher capacity than analog systems since they can use more spectrally-efﬁcient digital modulation and more efﬁcient techniques to share the cellular spectrum. They can also take advantage of advanced compression techniques and voice activity factors. In addition, encryption techniques can be used to secure digital signals against eavesdropping. Digital systems can also offer data services in addition to voice, including short messaging, email, Internet access, and imaging capabilities (camera phones). Due to their lower cost and higher efﬁciency, service providers used aggressive pricing tactics to encourage user migration from analog to digital systems, and today analog systems are primarily used in areas with no digital service. However, digital systems do not always work as well as the analog ones. Users can experience poor voice quality, frequent call dropping, and spotty coverage in certain areas. System performance has certainly improved as the technology and networks mature. In some areas cellular phones provide almost the same quality as landline service. Indeed, some people have replaced their wireline telephone service inside the home with cellular service.Spectral sharing in communication systems, also called multiple access, is done by dividing the signaling dimensions along the time, frequency, and/or code space axes. In frequency-division multiple access (FDMA) the total system bandwidth is divided into orthogonal frequency channels. In time-division multiple access (TDMA) time is divided orthogonally and each channel occupiesthe entire frequency band over its assigned timeslot. TDMA is more difﬁcult to implement than FDMA since the users must be time-synchronized. However, it is easier to accommodate multiple data rates with TDMA since multiple timeslots can be assigned to a given user. Code-division multiple access (CDMA) is typically implemented using direct-sequence or frequency-hopping spread spectrum with either orthogonal or non-orthogonal codes. In direct-sequence each user modulates its data sequence by a different chip sequence which is much faster than the data sequence. In the frequency domain, the narrowband data signal is convolved with the wideband chip signal, resulting in a signal with a much wider bandwidth than the original data signal. In frequency-hopping the carrier frequency used to modulate the narrowband data signal is varied by a chip sequence which may be faster or slower than the data sequence. This results in a modulated signal that hops over different carrier frequencies. Typically spread spectrum signals are superimposed onto each other within the same signal bandwidth. A spread spectrum receiver separates out each of the distinct signals by separately decoding each spreading sequence. However, for non-orthogonal codes users within a cell interfere with each other (intracell interference) and codes that are reused in other cells cause intercell interference. Both the intracell and intercell interference power is reduced by the spreading gain of the code. Moreover, interference in spread spectrum systems can be further reduced through multiuser detection and interference cancellation. More details on these different techniques for spectrum sharing and their performance analysis will be given in Chapters 13-14. The design tradeoffs associated with spectrum sharing are very complex, and the decision of which technique is best for a given system and operating environment is never straightforward.Efﬁcient cellular system designs are interference-limited, i.e. the interference dominates the noise ﬂoor since otherwise more users could be added to the system. As a result, any technique to reduce interference in cellular systems leads directly to an increase in system capacity and performance. Some methods for interference reduction in use today or proposed for future systems include cell sectorization, directional and smart antennas, multiuser detection, and dynamic resource allocation. Details of these techniques will be given in Chapter 15.The ﬁrst generation (1G) cellular systems in the U.S., called the Advance Mobile Phone Service (AMPS), used FDMA with 30 KHz FM-modulated voice channels. The FCC initially allocated 40 MHz of spectrum to this system, which was increased to 50 MHz shortly after service introduction to support more users. This total bandwidth was divided into two 25 MHz bands, one for mobile-to-base station channels and the other for base station-to-mobile channels. The FCC divided these channels into two sets that were assigned to two different service providers in each city to encourage competition. A similar system, the European Total Access Communication System (ETACS), emerged in Europe. AMPS was deployed worldwide in the 1980’s and remains the only cellular service in some of these areas, including some rural parts of the U.S.Many of the ﬁrst generation cellular systems in Europe were incompatible, and the Europeans quickly converged on a uniform standard for second generation (2G) digital systems called GSM 1. The GSM standard uses a combination of TDMA and slow frequency hopping with frequency-shift keying for the voice modulation. In contrast, the standards activities in the U.S. surrounding the second generation of digital cellular provoked a raging debate on spectrum sharing techniques, resulting in several incompatible standards [10, 11, 12]. In particular, there are two standards in the 900 MHz cellular frequency band: IS-54, which uses a combination of TDMA and FDMA and phase-shift keyed modulation, and IS-95, which uses direct-sequenceCDMA with binary modulation and coding [13, 14]. The spectrum for digital cellular in the 2 GHz PCS frequency band was auctioned off, so service providers could use an existing standard or develop proprietary systems for their purchased spectrum. The end result has been three different digital cellular standards for this frequency band: IS-136 (which is basically the same as IS-54 at a higher frequency), IS-95, and the European GSM standard. The digital cellular standard in Japan is similar to IS-54 and IS-136 but in a different frequency band, and the GSM system in Europe is at a different frequency than the GSM systems in the U.S. This proliferation of incompatible standards in the U.S. and internationally makes it impossible to roam between systems nationwide or globally without a multi-mode phone and/or multiple phones (and phone numbers).All of the second generation digital cellular standards have been enhanced to support high rate packet data services [15]. GSM systems provide data rates of up to 100 Kbps by aggregating all timeslots together for a single user. This enhancement is called GPRS. A more fundamental enhancement, Enhanced Data Services for GSM Evolution (EDGE), further increases data rates using a high-level modulation format combined with FEC coding. This modulation is more sensitive to fading effects, and EDGE uses adaptive techniques to mitigate this problem.Speciﬁcally, EDGE deﬁnes six different modulation and coding combinations, each optimized to a different value of received SNR. The received SNR is measured at the receiver and fed back to the transmitter, and the best modulation and coding combination for this SNR value is used. The IS-54 and IS-136 systems currently provide data rates of 40-60 Kbps by aggregating time slots and using high-level modulation. This evolution of the IS-136 standard is called IS-136HS (high-speed). The IS-95 systems support higher data using a time-division technique called high data rate (HDR)[16].The third generation (3G) cellular systems are based on a wideband CDMA standard developed within the auspices of the International Telecommunications Union (ITU) [15]. The standard, initially called International Mobile Telecommunications 2000 (IMT-2000), provides different data rates depending on mobility and location, from 384 Kbps for pedestrian use to 144 Kbps for vehicular use to 2 Mbps for indoor ofﬁce use. The 3G standard is incompatible with 2G systems, so service providers must invest in a new infrastructure before they can provide 3G service. The ﬁrst 3G systems were deployed in Japan. One reason that 3G services came out ﬁrst in Japan is the process of 3G spectrum allocation, which in Japan was awarded without much up-front cost. The 3G spectrum in both Europe and the U.S. is allocated based on auctioning, thereby requiring a huge initial investment for any company wishing to provide 3G service. European companies collectively paid over 100 billion dollars in their 3G spectrum auctions. There has been much controversy over the 3G auction process in Europe, with companies charging that the nature of the auctions caused enormous overbidding and that it will be very difﬁcult if not impossible to reap a proﬁt on this spectrum. A few of the companies have already decided to write off their investment in 3G spectrum and not pursue system buildout. In fact 3G systems have not grown as anticipated in Europe, and it appears that data enhancements to 2G systems may sufﬁce to satisfy user demands. However,the 2G spectrum in Europe is severely overcrowded, so users will either eventually migrate to 3G or regulations will change so that 3G bandwidth can be used for 2G services (which is not currently allowed in Europe). 3G development in the U.S. has lagged far behind that of Europe. The available 3G spectrum in the U.S. is only about half that available in Europe. Due to wrangling about which parts of the spectrum will be used, the 3G spectral auctions in the U.S. have not yet taken place. However, theU.S. does allow the 1G and 2G spectrum to be used for 3G, and this ﬂexibility may allow a more gradual rollout and investment than the more restrictive 3G requirements in Europe. It appears that delaying 3G in the U.S. will allow U.S. service providers to learn from the mistakes andsuccesses in Europe and Japan.。

通信英语(第四版)课后习题名词解释答案加翻译句子

1.PCM原理抽样量化与编码:sampling,quantizing and coding话路:speech channel幅值: amplitude value抽样频率: sampling frequency抽样速率: sampling rate脉冲流: stream of pulses重复率: repetition rate编码过程: coding process模拟信号: analog signal传输质量: transmission quality数字通信: digital communication数字传输: digital transmission含噪声的环境: noisy environment传输路由: transmission path信噪比 :signal-to-noise ratio信号电平 :signal levels噪声功率: noise power地面系统: terrestrial system二进制传输: binary transmission反向操作: reverse operation8-位码序列: 8-digit sequence接受端: receiving terminal帧格式 :frame format同步字 :synchronization word实现这三项功能的方案 :the schemes for performing these three functions一串幅值: a series of amplitude values电话质量的话路 a speech channel of telephone quality一个8位二进制码的序列: a sequence of 8-binary digits理论上的最小抽样频率 :a minimum theoretical sampling frequency占据着300Hz到3.4kHz频率范围的话路: a voice channel occupying the range 300Hz to 3.4kHz 每个样值8-位码: 8-digits per sample value汽车点火系统的打火: the sparking of a car ignition system重复率为64kHz的脉冲流: the stream of the pulses with a repetition rate of 64kHz真实信号与噪声信号的关系: relationship of the true signal to the noise signal由卫星上接受到的信号 :the signal received from a satellite一条特定消息中的全部信息 :the complete informatian about a particular message被传信号的波形 :the shape of the transmitted signal由传输路由引入的衰减: the attenuation introduced by transmission path将抽样的幅值转换成一串脉冲的单元 :the unit that converts sampled amplitude value to a set of pulses涉及到第一路，第二路及其他各路的序列: a sequence relating to channel 1,2 and so on被称为同步字的独特码序列: a unique sequence of pulses called synchronization word地面系统 :terrestrial system脉冲的“有”或“无” : the presence or absence of the pulses高速的电子开关: a high-speed electronic switch时分多路复用器 :the time division multiplexer时分多路复用 :Time Division Multiplexer2.异步串行数据传输串行接口 serial interface显示终端 CRT terminal发送器与接收器 transmitter and receiver数据传输 data transmission数据流 data stream闲置状态 the idle state传号电平 mark level空号电位 space level起始位 start bit停止位 stop bitT秒的持续时间 duration of T seconds奇偶校检位 parity bit错误标志 error flag传输错误 transmission error下降沿 fallinf edge符号间的空格 intersymbol space接收机的定时 receiver timing本地时钟 local clock磁带 magnetic tape控制比特 control bit逻辑1电平 logical 1 level二进制数据 binary data明显的缺点 obvious disadvantage异步串行数据传输 asynchronous serial data transmission最为流行的串行接口 the most popular serial interface所传送的数据 the transmitted data发送器与接收器的时钟 the clocks at the transmitter and receiver电传机的时代 the era of teleprinter一个字符的点和划 the dots and dashs of a character符号间空格持续时间的三倍 three times the duration of intersymbol space被称为字符的比特组 the group of bits called characters由7或8个比特的信息组成的固定单元 the invariable units comprising 7 or 8 bits of information 由接收机本地产生的时钟 a clock generated locally by the receiver在字符后所收到的奇偶校检位 the received parity bit following the character起始位的下降沿 the falling edge of the start bit数据链路面向字符的特性 the character-oriented nature of the data link3.数据通信地下电缆 underground cable通信卫星 communication satellite微波设备 microwave facilities调制器与解调器 modulator and demodulator缓冲器 buffer定时信号 timing signals同步脉冲 synchronization pulses时隙 time slot移位寄存器 shift register传输媒体 transmission medium线形衰弱 linear attenuation信息安全 information security键盘 keyboard数据终端 data terminals某种类型的数据转换设备 some type of data conversion equipment视频显示终端 visual display terminal称为数据调制解调器的双向数据发送接收机 two-way data transmistter-receiver called a data modem 全双工的数据传输系统 full-duplex data trandmission system由数据处理器的运算速率所决定的速率 the rate determined by the operating speed of the data processor由接口部件来的定时信号 timing signals from the interface assembly磁心存储器 magnetic core memories线性衰减和时延特性 linear attenuation and delay characteristics传输损伤 transmission impairments语音中的冗余特性 the redundant nature of speech在数据发送器中的编码过程 coding process in the data transmitter二进制的不归零信号 binary nonreturn-to-zero signal4.互联网网络资源：network resource信息服务：information services远程终端：remote terminals互联的系统：interconnected systems命令：command电子邮件：electronic mail主机：host无线信道：wireless channels搜索工具：searching tools用户界面：user interface存取：access文本信息：textual messages协议：protocol超文本协议：hypertext protocol分布在全世界的计算机的巨大网络：gaint network of computers located all over the world主干系统：backbone system全国范围的网络：nationwild network电子会议：electronic conferences实时对话：live conversation最大的信息库the largest repository of the computers on the net网络设备资源：network facilities resources在网上的绝大多数计算机：the vast majority of the computer on the netUNIX操作系统：the UNIX operating system在因特网和你的PC机之间传送数据的方法：a way to move data between the internet and your PC 方便的搜索工具：the convenient searching tools联网的超文本协议：the network hypertext protocol5.光纤通信介绍光纤通信:optical fiber communications光源：light source波长：wavelength激光器：laser色散：dispersion传输介质：transmission medium多模光纤：multi-mode fiber长途干线：long-houl trunks单模光纤：singer-mode fiber带宽：bandwidth带宽用户：wideband subscriber纤维光学：fiber-optics商用技术：commercial technologe门限电流：threshod current光检测器：photodetector波分复用：wavelength multiplexing纤维光网络：fiber-optic network视频带宽：video bandwidth长途传输：long distance transmission中继距离：repeater spacing已装光纤的总长度：the total length of installed fiber长途通信系统：long-haul telecommunication system低衰减的石英纤维：the low-loss silica fiber衰减接近瑞利极限的光纤：fibers with losses approaching the Rayleigh limit室温下的门限电流：room temperature threshold currents较长波长区：the longer wavelength region用户接入工程：subscriber access project部件性能和可靠性的改进：improvements in component performance and reliability已安装的光纤系统的数据速率：data rates for installed fibre optic system每秒吉比特：gigabit per second range波分复用：wavelength multiplexing带宽用户环路系统：widebend subscriber loop system多纤连接器：multifibre connectors设计寿命：projected lifetime光源：light source单模光纤：single-mode fibre分布反馈式激光器：distributed-feedback laser信息容量：information capacity交换体系：switching hierarchy带宽业务：broadband services9.蜂窝式移动电话系统蜂窝式移动电话：cellular mobile telephone服务性能：services performance频谱：frequency spectrum频带：frequency band微处理器：microprocessor移动手机：mobile unit广播业务：broadcast servise天线：antenna子系统：subsystems移动用户：mobile subscriber服务能力：service capability利用率：utilization带宽：bandwidth单边带：single-sideband扩频：spread spectrum大规模集成电路：large scale integrated circuits蜂窝点：cellular site蜂窝交换机：cellular switch无线机架：radio cabinet呼叫处理：call processing频谱利用率：frequency spectrum utilization有限的指定频带：the limited assigend ferquency band 服务区：servise area复杂的特性和功能：complicated features and functions大规模集成电路技术：large-scale integraesd circuit technology试验性的蜂窝系统：developmental cellular system中央协调单元：central coordinating element蜂窝管理：cellular administration传统移动电话的运行限制：operational limitiation of conventional mobile telephone system 有限的服务能力：limitied service capability无线通信行业：radio communcation industry可用的无线电频谱：available radio frequency spectrum所分配的频带：the allocated frequency band移动收发信机：mobile transceiver技术上的可行性：techological feasibility严格的频谱限制：severe spectrum limitations调频广播业务：FM broadcasting services传播路径衰耗：propagration path loss多径衰耗：multipath fading电话公司地方局:telephone company zone offices10.全球移动通信系统个人通信 personal communcation通信标准 communcation standrads固定电话业务 fixed telephone services网络容量 network capability移动交换中心 mobile switching center国际漫游 international roaming宽带业务 broadband services接口转换 interface conversion频谱分配 frequency allocation模拟方式 analogue mode蜂窝通信原理 cellular communcation principe拥塞 jamming蜂窝裂变 cellular splitting基站 base station寄存器 register收费功能 billing function接入方法 access method突发脉冲传输方式 brusty transimission mode开销信息 overhead information切换算法 handover algorithms短消息服务 short message services技术规范 technical specificationtotal access communcation system 全接入的通信系统global mobile communcation system 全球移动通信系统time division multiple access 时分多址facsimile and short message services 传真和短消息服务fixed communcation networks 固定通信网络a more personalized system 更加个性化的系统the cost and quality of the link 链路的价格和质量market growth 市场的发展fixed telephone service 固定电话服务coxial cable 同轴电缆interface convision 接口转换cellular communcation priciple 蜂窝通信原则frequency reuse and cell splitting 频率复用和蜂窝裂变cochannel interference 共信道干扰theoretical spectual capability 理论上的频谱容量micro-cellular system 微蜂窝系统base station transceiver 基站收发信机subscriber register 用户寄存器burst transmission mode 突发脉冲传输模式overhead information 开销信息advanced handover algorithms 先进的切换算法facsimile and short message services 传真和短消息服务the GSM technique specications GSM技术规范说明一1 . 研究二进制的传输可见, 只要简单地去判别脉冲的“有”和“无”, 我们就获得了一条消息的全部信息。

通信方面一些英语的翻译

通信工程专业课程Communication Engineering Specialty Course专业核心课程：The professional core courses:信息论与编码原理、通信原理、电视原理、电磁场与电磁波、天线与电波传播Information theory and coding theory, communication principle, the principle of television, electromagnetic field and electromagnetic wave, antenna and radio wave propagation广播电视发送方向：数字电视技术、广播电视发送技术、数字广播技术Radio and television transmission direction: digital television technology, radio and television transmission technology, digital broadcasting technology移动通信方向：移动通信、现代交换技术、移动电视技术Directions: mobile communication, mobile communication, mobile TV technology of modern switching technology信息论与编码原理：本课程着重介绍信源的类型与特性、信源熵、信道容量、信息率失真函数等信息论的基本理论，以及信源编码和信道编码的基本概念和主要方法。

这些信息论与编码的基本理论和方法不仅适用于通常意义的通信领域，如数字视音频处理和多媒体通信等，也适用于信息安全等计算机信息处理和管理等专门领域的需要。

Information theory and coding theory: This course mainly introduces the types and characteristics of information source, information entropy, channel capacity, information rate distortion function of information theory, as well as the source coding and channel coding of the basic concepts and main methods. The information theory and coding theory and method can be applied not only to the usual sense of the communication field, such as the processing of digital audio and video and multimedia communications, also applies to the information security of computer information processing and management of specialized areas of need.通信原理：本课程以当前广泛应用的通信系统和代表发展趋势的通信技术为背景，系统介绍数字通信基本原理，为学生今后从事相关工作提供理论基础和实际知识。

通信的目的英语作文带翻译

通信的目的英语作文带翻译Title: The Importance of Communication in Today's World。

Communication plays a crucial role in our daily lives, facilitating the exchange of ideas, information, and emotions among individuals and communities. In today's interconnected world, effective communication is more essential than ever before. This essay explores the significance of communication in various aspects of lifeand highlights its role in fostering understanding and collaboration.To begin with, communication is fundamental forbuilding and maintaining relationships. Whether in personal or professional settings, clear and open communication is key to developing trust and mutual respect. In families, effective communication helps resolve conflicts and strengthen bonds. Similarly, in the workplace, good communication enhances productivity and teamwork. By exchanging feedback and ideas openly, individuals cancollaborate efficiently towards common goals.Moreover, communication is vital for educational and societal development. In schools and universities,effective communication between teachers and students fosters a conducive learning environment. It encourages students to ask questions, seek clarification, and participate actively in discussions. Furthermore, in society, communication facilitates the sharing of knowledge and ideas, leading to cultural enrichment and intellectual growth.In the business world, effective communication is essential for success. Businesses rely on communication to interact with customers, negotiate deals, and collaborate with partners and stakeholders. Clear and concise communication enhances customer satisfaction and ensures that organizational objectives are achieved efficiently. Additionally, communication skills are highly valued in leadership roles, enabling managers to inspire and motivate their teams effectively.In the context of technology and globalization, communication has undergone significant transformations. Advances in telecommunications and digital media have revolutionized how people connect and interact. Social media platforms, for instance, allow individuals to share information instantly with a global audience. However, while technology has made communication more accessible, it also presents challenges such as information overload and privacy concerns.Effective communication involves not only speaking and writing but also listening and understanding. Active listening is a critical skill that fosters empathy and comprehension. By listening attentively, individuals can grasp others' perspectives and respond thoughtfully. Furthermore, non-verbal communication, such as body language and facial expressions, conveys subtle cues that enhance understanding in interpersonal interactions.In conclusion, communication is a cornerstone of human interaction, enabling individuals and societies to thrive. By fostering meaningful connections and enabling theexchange of ideas, communication promotes collaboration, innovation, and progress. In today's complex and interconnected world, developing effective communication skills is essential for personal growth and professional success.Translation:标题，在当今世界中沟通的重要性。

光学通信英语作文模板范文

光学通信英语作文模板范文Optical Communication。

With the rapid development of technology, optical communication has become an essential part of our daily lives. It has revolutionized the way we communicate, providing faster, more reliable, and secure transmission of information. In this article, we will explore the basics of optical communication, its advantages, and its applications in various fields.First and foremost, let's understand what optical communication is. Optical communication is a method of transmitting information using light as the carrier. It involves the use of optical fibers, which are thin, flexible, and transparent fibers made of glass or plastic. These fibers are capable of transmitting large amounts of data over long distances at high speeds. The process of optical communication involves converting electrical signals into optical signals, transmitting these signalsthrough the optical fibers, and then converting them back into electrical signals at the receiving end.One of the key advantages of optical communication is its high bandwidth. Optical fibers have a much larger bandwidth compared to traditional copper wires, allowing them to transmit a greater amount of data in a shorter amount of time. This makes optical communication ideal for applications that require high-speed data transmission, such as internet connections, telecommunication networks, and data centers.Another advantage of optical communication is its low signal loss. Optical fibers have the ability to transmit signals over long distances with minimal loss of signal strength. This is due to the fact that light travels through the fibers in a straight line, without being affected by external interference or environmental factors. As a result, optical communication offers a more reliable and stable transmission of information compared to other communication methods.Furthermore, optical communication is also highly secure. Since light signals are transmitted through the fibers, they are not susceptible to electromagnetic interference or eavesdropping. This makes optical communication an ideal choice for transmitting sensitiveand confidential information, such as financial transactions, government communications, and military operations.The applications of optical communication are vast and diverse. In the field of telecommunications, optical communication is used to transmit voice, data, and video signals over long distances, providing high-speed internet connections, cable television, and telephone services to consumers and businesses. In addition, optical communication is also used in the healthcare industry for medical imaging, diagnostics, and remote patient monitoring. It is also widely used in the transportation industry for traffic management, vehicle tracking, and navigation systems.Moreover, optical communication plays a crucial role inthe field of scientific research and education. It is used in laboratories and research facilities for the transmission of data from scientific instruments, such as telescopes, microscopes, and particle accelerators. In addition, optical communication is used in educational institutions for distance learning, online courses, and virtual classrooms.In conclusion, optical communication has revolutionized the way we transmit information, offering faster, more reliable, and secure communication methods. Its high bandwidth, low signal loss, and security make it an ideal choice for a wide range of applications in various fields. As technology continues to advance, the potential for optical communication to further improve and expand its capabilities is limitless. It is clear that optical communication will continue to play a vital role in shaping the future of communication and technology.。

通信英语翻译

通信英语翻译Communication English TranslationCommunication is the process of transmitting and receiving information. It plays a vital role in our daily lives, allowing us to connect with others, exchange ideas, and share knowledge. In this fast-paced world, effective communication is more important than ever, as it enables us to express our thoughts and feelings clearly and facilitates cooperation and understanding.There are many forms of communication, including verbal, nonverbal, written, and visual. Verbal communication involves using words to convey our thoughts and ideas. It can take place in various settings, such as conversations, meetings, or presentations. Nonverbal communication, on the other hand, includes body language, facial expressions, and gestures. It often conveys emotions and can sometimes be more powerful than words.Written communication encompasses any form of written message, whether it is an email, letter, memo, or report. It is an essential skill in the business world, as it allows for clear and concise communication and provides a record of information. Visual communication, which includes the use of charts, graphs, and pictures, is particularly effective in conveying complex ideas or data.In order for communication to be successful, certain elements must be present. The sender must have a clear message and be able to express it effectively. The receiver must be attentive and capable of understanding the message. Feedback is also important, as itallows the sender to know whether the message was received and understood correctly.In addition to these elements, effective communication requires good listening skills. Listening involves paying attention to the speaker, understanding their message, and providing appropriate feedback. It is a skill that can be developed through practice and active engagement in conversations and discussions.Communication can also be influenced by cultural factors. Different cultures have their own ways of expressing ideas and emotions, and understanding these cultural differences is essential for effective communication. It is important to be aware of cultural norms and adjust our communication style accordingly to avoid misunderstandings or conflicts.In the digital age, technology has revolutionized communication. We now have access to various communication tools, such as smartphones, social media, and video conferencing. These tools have made it easier to connect with people from around the world and share information instantly. However, it is important to remember that technology is just a tool and should not replace face-to-face communication, which provides a more personal and meaningful interaction.Effective communication is a valuable skill in all aspects of life. It can help us build strong relationships, resolve conflicts, and achieve our goals. By continuously improving our communication skills, we can ensure that our messages are heard and understood, leading to more successful and fulfilling interactions.。

通信协议英语翻译中文

通信协议英语翻译中文Communication Agreement通信协议This communication agreement (hereinafter referred to as the "Agreement") is made and entered into on [Date] by and between [Party A], with its principal place of business at [Address], and [Party B], with its principal place of business at [Address].此通信协议（下称“协议”）由[甲方]，其主要营业地位于[地址]，以及[乙方]，其主要营业地位于[地址]，于[日期]签订并生效。

1. Basic Information 双方基本信息1.1 Party A and Party B: The parties to this Agreement are identified above.本协议中的双方为上文中列出的两个方。

2. Identity, Rights, Obligations, Performance Method, Term, Breach Liability 各方身份、权利、义务、履行方式、期限、违约责任2.1 Party A: [Party A] is a [describe the identity of Party A] and has the right to [describe the rights of Party A, e.g., use Party B's confidential information to complete the project]. Party A has the obligation to [describe the obligations of Party A, e.g., keepParty B's confidential information secure and not disclose it to any third party].[Party A]是[描述甲方身份的描述]，有权[描述甲方的权利，例如使用乙方机密信息来完成项目]。

通信英语作文

通信英语作文Title: The Evolution of Communication: Embracing English as a Lingua Franca。

Communication is the cornerstone of human interaction, serving as the conduit for the exchange of ideas, emotions, and information. In today's interconnected world, mastering English as a lingua franca has become increasingly essential. This essay explores the significance of English in communication and its evolution in various spheres of life.Firstly, English has emerged as the global language of business. In an era of globalization, companies operate across borders, necessitating effective communication among diverse teams and stakeholders. English facilitates seamless collaboration, enabling organizations to transcend linguistic barriers and reach a broader audience. Whetherit's negotiating deals, drafting contracts, or delivering presentations, proficiency in English enhances one'sprofessional competence and marketability.Moreover, English plays a pivotal role in academia and research. As the language of scholarly discourse, it enables scholars from different countries to share their findings, collaborate on projects, and contribute to the advancement of knowledge. Academic journals, conferences, and publications predominantly use English as the medium of communication, ensuring accessibility and dissemination of research on a global scale. By embracing English, researchers can engage with a broader community, fostering innovation and intellectual exchange.In addition, English serves as the language of technology and innovation. From software programming to digital marketing, proficiency in English is indispensable for navigating the digital landscape. The internet, often dubbed the "lingua franca of the digital age," predominantly operates in English, with a vast majority of online content available in the language. Command over English empowers individuals to leverage technology, access online resources, and participate in the digital economy,thereby bridging the digital divide and fostering digital inclusion.Furthermore, English facilitates cultural exchange and mutual understanding. Through literature, films, music, and art, English serves as a window to diverse cultures and perspectives. By engaging with English-language media, individuals gain insights into different societies, values, and traditions, promoting empathy, tolerance, and global citizenship. Additionally, proficiency in English enables cross-cultural communication and fosters meaningful connections with people from around the world, enriching personal experiences and expanding horizons.However, the prevalence of English as a lingua franca also raises concerns about linguistic diversity andcultural hegemony. While English proficiency offers numerous benefits, it can inadvertently marginalize non-native speakers and undermine indigenous languages. Efforts to promote multilingualism and preserve linguistic heritage are crucial for safeguarding cultural diversity and ensuring inclusive communication.In conclusion, English has emerged as the lingua franca of the modern world, permeating various aspects of society, including business, academia, technology, and culture. Mastery of English empowers individuals to navigate the complexities of a globalized world, fostering collaboration, innovation, and mutual understanding. However, it is imperative to recognize the importance of linguistic diversity and promote inclusive communication practicesthat respect and celebrate all languages and cultures. By embracing English as a tool for communication while valuing linguistic plurality, we can forge a more connected, inclusive, and harmonious global community.。

通信英语作文

通信英语作文IntroductionIn today’s world, communication plays a crucial role in connecting people from different cultures and backgrounds. With the advancement of technology, various means of communication have emerged, making it easier for people to stay connected. In this article, we will explore the importance of communication in the modern world and discuss different modes of communication in English.Importance of CommunicationCommunication is essential for promoting understanding and building relationships. In a globalized world, effective communication skills are highly valued. It helps individuals express their thoughts, ideas, and emotions, facilitating cooperation and collaboration. Whether in personal or professional settings, effective communication is vital for success.Modes of Communication1. Verbal CommunicationVerbal communication involves the use of spoken or written words to convey messages. In English, it is crucial to have good verbal communication skills to interact with people from different countries. This can be achieved through language learning, practicing pronunciation, and improving vocabulary and grammar.2. Non-verbal CommunicationNon-verbal communication involves the use of body language, gestures, facial expressions, and tone of voice to convey messages. It is equally important to understand and interpret non-verbal cues when communicating in English. Being aware of cultural differences in non-verbal communication can prevent misunderstandings and promote effective communication.3. Written CommunicationWritten communication is important for formal and professional communication. It includes emails, letters, reports, and other written documents. In English, having good writing skills is essential to convey messages clearly and concisely. It requires proper grammar, vocabulary, and organizational skills.4. Digital CommunicationWith the advent of technology, digital communication has become an integral part of our lives. It includes communication through email, instant messaging, social media, and video conferencing. In English, digital communication skills are essential, as it allows people to connect with others globally, share ideas, and collaborate on projects.Improving Communication Skills in English1. Language LearningLearning English as a second language is essential for effective communication. It involves studying grammar, vocabulary, and pronunciation. Taking language courses, practicing speaking with native speakers, and immersing oneself in an English-speaking environment can improve language skills.2. Active ListeningActive listening is a crucial skill for effective communication. It involves paying full attention to the speaker, understanding their message, and responding appropriately. Practicing active listening can help in understanding different accents and improving overall communication skills.3. Cultural AwarenessCultural awareness is important when communicating in a multicultural environment. Understanding cultural norms, values, and customs can help avoid misunderstandings and foster effective communication. Being open-minded and respectful towards different cultures is essential for successful communication.4. Practice and FeedbackRegular practice is key to improving communication skills. Engaging in conversations with native English speakers, participating in language exchange programs, and seeking feedback from others can help identify areas for improvement and enhance overall communication abilities.ConclusionEffective communication in English is vital for personal and professional success in today’s interconnected world. By developing strong communication skills, both verbal and non-verbal, individuals can overcome language barriers and connect with people from diverse backgrounds. Continuous learning, practice, and cultural awareness are crucial in becoming proficient in communication in English. So, let’s embrace the importance of communication and work towards enhancing our skills in order to thrive in our personal and professional lives.。

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通信英语作文