1、电子自动化系考研复试专业英语词汇完美版1.通信原理词汇Uint1抽样量化和编码：sampling quantizing and coding话路：speech channel幅值：amplitude value抽样频率：sampling frequency抽样速率：sampling speed rate 脉冲流：stream of pulses重复率： repetition rate编码过程：coding processs模拟信号：analog signal传输质量transmission quality数字通信digital communication数字传输digital transmis
2、sion含噪声的环境noisy environment传输路由transmission path信号比signal-to-noise ratio信号电平signal levels地面系统terrestrial system噪声功率noise power二进制传输binary transmission反向操作reverse operation8位码序列8-digit sequence接收端receiving terminal帧格式frame format同步字synchronization wordthe schemes for performing these three function 实
3、现这三项功能的方案a series of amplitude values 一串幅值a speech channel of telephone quality 电话质量的话路a sequence of 8-binary digits 一个8位二进制码的序列a minimum theoretical sampling frequency 理论上的最小抽样频率a voice channel occupying the range 300Hz to 3.4KHz 占据着300Hz到3.4KHz 频率范围的话路8-digits per sample value 每个样值8位码the sparking
4、of a car ignition system 汽车点火系统的大火the stream of the pulsese with a repetition rate of 64KHz 重复率为64KHz的脉冲the relationship of the true signal to the noise signal 真实信号与噪声信号的关系the signal received from a satellite 由卫星上收到的信号the complete information about a particular message 一条特定消息的全部信息the shape of the tr
5、ansmitted signal 被传信号的波形the attenuation introduced by transmission path 由传输路由引入的衰减the unit that converts sampled amplitude value to a set of pulses 将抽样的幅值转换成一串脉冲的单元a sequence relating to channel 1，2 and son on涉及到第一路、第二路及其他各路的序列a unique sequence of pulses called synchronization word 被称为同步字的独特的码序列terr
6、estrial system 地面系统the presence or absence of the pulse 脉冲的“有”或“无”a high-speed electronic switch 高速的电子开关the time division multiplexer 时分多路复用器Time Division Multiplexing 时分多路复用Unit2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 idl
7、e state 传号电平 mark level 空号电平 space level 起始位start bit 停止位stop bit T秒的持续时间duration of T seconds 奇偶校验位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
8、 明显的缺点obvious disadvantage asynchronous serial data transmission 异步串行数据传输 The most popular serial interface 最为流行的串行接口 The transmitted data 所传送的数据 The clocks at the transmitter and receiver发送器和接收器的时钟 The era of teleprinter电传机的时代 The dots and dashes of a character一个字符的点和划 Three times the duration of i
9、ntersymbol space符号间空格持续时间的三倍 The group of bits called characters 被称为字符的比特组 The invariable units comprising 7 or 8 bits of information由7或8个比特的信息组成的固定单元 A clock generated locally by the receiver 由接收机本地产生的时钟 The received parity bit following the character 在字符后所收到的奇偶校验位 The falling edge of the start bit
10、 起始位的下降沿 The character-oriented nature of the data link 数据链路面向字符的特性Uint3联网技术 networking technology国际标准化组织 international Organization for Standardization (ISO)参考模型 reference model数据分组 packet data应用程序 application program 网络媒体 network media分层 called layering 硬件和软件 hardware and software表示层 the presentat
11、ion 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 data format主机 host协议 protocol连接 connectivity逻辑地址 logical addressingNetworking technology 联网技术Proprietary networking system 专用联网系统The international Organization for Standardization 国际标准规划组织Compatibility
12、 between the various type of networks 各种网络之间的兼容性Seven numbered layers 七层协议Standardization of network components 网络部件的标准化Error recovery 纠错Receiving hosts system 发方主机系统Connection-oriented circuits 面向连接的电路Information flow control 信息流控制Network media access 网络媒体接入Electrical specification 电气特性Maximum tran
13、smission distance 最大传输距离Uint 4传输控制协议transmission control protocol互联协议Internet protocol数据通信data communication微波microwave高层协议higher-level protocol流量控制traffic control目的地destination（信）源resource段segment互联层Internet layer分组交换packet switching 超文本传输协议hypertext transfer protocol灵活性flexibility数据报datagramtransm
14、ission control protocol传输控制协议Internet protocol互联协议satellite links卫星链路the Standard On which the internet has grown互联网发展所基于的标准Network access layer网络接人层connectionoriented protocol面向连接的协议file transfer protocol文件传输协议hypertext transfer protocol超文本传输协议domain name system域名系统developer of software软件开发人user da
15、tagram protocol用户数据报协议packet -switched technology分组交换技术Unit 5局域网local area network工作站workstation外设peripheral拓扑topology集线器hub交换器switch流量traffic网络接口卡network interface card数据库database印刷电路板printed circuit board主板motherboard网络适配器network adaptor并行数据parallel data电脉冲electrical impulses中继器repeater联网介质networking medialocal-area network局域网logical topology逻辑拓扑devices that connect directly to a network segment直接连到网络段的部件network interface card网络接口卡process of the encapsulatio
