抽样量化编码 话路 幅值 抽样频率 抽样速率 脉冲流 重复率 编码过程 模拟信号 传输质量 数字通信 数字传输 含噪声的环境 传输路由 信噪比 信号电平 地面系统 噪声功率 二进制传输 反向操作 8-位码序列 接收端 帧格式 同步字 | the schemes for performing the three functions a ries of amplitude values a speech channel of telephone quality a quence of 8 binary digits a minimum theoretical sampling frequency a voice channel occupying the range 300 Hz to3.4 kHz 8ditits per sample value the sparking of a car ignition system the stream of the puls with a repetition rate of 64 khz relationship of the true signal to the noi signal the signal received from a satellite teh complete information about a particular message the shape of the transmitted signal the attenuation introduced by transmission path the unit that converts sampled amplitude value to a t of puls a quence relating to channel 1,2 and so on a unique quence of puls called synchronization word terrestrial system the prence of abnce of the pul a high-speed electronic switch the time division multiplexer time division multiplexing |
串行接口 显示终端 发送器与接收器 数据传输 数据流 闲置状态 传号电平 空号电平 起始位 停止位 T秒的持续时间 奇偶校验为 错误标志 传输错误 下降沿 符号间的空格 接收机的定时 本地时钟 磁带 控制比特 逻辑1电平 二进制数据 明显的缺点 | asynchronous rial data transmission the most popular rial interface the transmitted data the clocks at the transmitter and receiver the ear of teleprinter the dots and dashes of a character three times the duration of intersymbol space the group of bits called characters the invariable units comprising 7or 8 bits of information a clock generated locally by the receiver the received parity bit following the character the falling edge of the start bit the character-oriented nature of the data link |
地下电缆 卫星通信 微波设备 调制器与解调器 缓冲器 定时信号 同步脉冲 时隙 位移寄存器 传输媒体 线性衰落 信息安全 键盘 数据终端 | some type of data conversion equipment visual display terminal two-way data transmitter-receiver called a data modem full-duplex data transmission system the rate determined by the operating speed of the data processor timing signals from the interface asmbly magnetic core memories linear attenuation and delay characteristics transmission impairments the redundant nature of speech coding process in the data transmitter binary nonreturn-to-zero signal |
网络资源 信息服务 远程终端 地址 互联的系统 命令 电子邮件 主机 无线信道 搜索工具 用户界面 拷贝 互联网 存取 文本信息 鼠标 协议 超文本协议 | giant network of computers located all over the worked backbone system nationwide network electronic conferences remote terminal live conversation worldwide web arching tool the largest repository of information network facilities resources the vast majority of the computers on the net the Unix operating system textual messages a way to move data between the internet and your p the convenient arching tools the networked hypertext protocol |
光纤通信 光源 波长 激光器 色散 传输介质 多模光纤 长途干线 单模光纤 带宽 宽带用户 纤维光学 商用技术 门限电流 光检测器 波分复用 纤维光网络 视频带宽 | long distance transmission repeater spacing commercial technology optical fibre communications the total length of installed fibre long-haul telecommunication system the low-loss silica fibre fibers with loss approaching the Rayleigh limit room temperature threshold currents the longer wavelength region subscriber access project improvements in component performance and reliability data rates for installed fibre optic system gigabit per cond range wavelength multiplexing wideband subscriber loop system multifibre connectors projected life time light source single-mode fibre distributed-feedback lar information capacity switching hierarchy broadband rvices |
蜂窝式移动电话 服务性能 频谱 频带 微处理器 移动手机 广播业务 天线 子系统 移动用户 服务能力 利用率 单边带 扩频 大规模集成电路 蜂窝点 蜂窝交换机 无线机架 呼叫处理 服务区 | frequency spectrum utilization the limited assigned frequency band complicated features and functions large-scale integrated circuit technology developmental cellular system central coordinating element cellular administration operational limitation of conventional mobile telephone system limited rvice capability radio communication industry available radio frequency spectrum the allocated frequency band mobile transceiver technological feasibility vere spectrum limitations FM broadcasting rvice propagation path loss multipath fading radio cabinet telephone company zone offices |
个人通信 通信标准 固定电话业务 网络容量 移动交换中心 国际漫游 宽带业务 接口转化 频谱分配 模拟方式 蜂窝通信原理 拥塞 蜂窝裂变 基站 寄存器 收费功能 接入方式 突发脉冲光传输方式 开销信息 切换算法 短消息服务 技术规范 | total access communication system global mobile communication system time division multiple access facsimile and short message rvice fixed communication networks a more personalized system the cost and quality of the link market growth fixed telephone rvice coaxial cable interface conversion cellular communication principle frequency reu and cell splitting cochannel interference theoretical spectral capability micro-cellular system ba station transceiver subscriber register burst transmission mode overhead information advanced handover algorithms the GSM technical specifications |
本文发布于:2023-05-06 03:38:33，感谢您对本站的认可！
本文链接：https://www.wtabcd.cn/fanwen/fan/90/97461.html
版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系，我们将在24小时内删除。
| 留言与评论（共有 0 条评论） |
