对讲机

基于ARM内核的民用数字对讲机系统的设计

The Design of Civil Digital Walkie-Talkie System Based on ARM Kernel

G.723.1在基于DSP数字对讲机基带系统中应用

Application of G.723.1 for Baseband Digital Walkie-Talkie Baseband System Based on DSP

对讲机发出嗡嗡声，他按下了相应的开关。

The intercom buzzed and he pressed down the appropriate switch

他按了内部对讲机上的一个按钮。“有什么事吗？”一个声音问道。

He pushed a button on the intercom . ' Yes ? ' came a voice

高效率F类对讲机功率放大器的设计与实现

Design and Realization of High Efficiency Class F Power Amplifier for Interphone Application

数字对讲机SoC软件平台的组建方法

Software platform building methodology for digital interphone SoC

数字对讲机TDD通信协议的设计与实现

Study and Implementation of TDD Communication Protocol Applied in Digital Handsets

我公司提供的主要电梯部件有：控制柜、主机、LED吊顶、对讲机、操作面板及特殊（豪华型）的轿厢的设计和制造。

The main elevator parts which we can provide are below : Controller , Gearless machine , LED ceiling , interphone COP ; and the designing and manufacturing for some special ( luxury type ) cabin .

产品广泛用于手机、对讲机、数码相机、MP4、PDA等电子产品。

The product widely uses in the handset , intercom , digital camera , MP4 , PDA and so on .

电调VIP服务包含：“定点叫车器”叫车服务、“对讲机”叫车服务、大型活动现场调度服务。

Electric Control VIP Services includes " Fixed Point Call Machine " Taxi Service ," Interphone " Taxi Service and On-site Control Services for Large Events .

本文所研究的TDD数字对讲机，它为无绳电话、集群通信系统提供了另一种基于TDD方式的选择方案。

The digital handset studied in this thesis can provide another resolvent based on TDD for the Trunked communication system and cordless phone system .

数字集群通信是基于CDMA技术在公众移动网络上实现一种具有对讲机功能的移动业务，其网络覆盖面广，呼叫建立时延短，而且能够异地漫游。

Based on cdma techonology Digital trunking system has realized interphone function in public mobile network . It resolved cover , short call setup delay , roaming and communication problems in a great extent .

系统充分利用GPS卫星定位技术、无线通讯技术、计算机网络技术、警用地理信息平台，实现对持有手持对讲机的警员，进行实时的监督管理和警务调度。

This system takes sufficient advantage of GPS technology , radio communication technology , computer network technology , geographic information platform for police use and thus realize the real-time supervision management and police regulation for those policeman with the portable phone .

该频率合成器具有较低的相位噪声、很高的频率稳定度，它在无绳电话、WLAN、对讲机等移动通信领域有广泛的应用。

This frequency synthesizer circuit is of lower phase noise and higher frequency stability , therefore it has a widespread application in wireless communication system such as cordless telephone system . WLAN and transceiver .

为降低生产成本，本文提出了一项民用数字对讲机的系统解决方案。该方案利用SoC技术，来设计民用数字对讲机的专用ASIC芯片。

For the sake of reducing the production cost , this paper puts forward a scheme which utilizes the SoC ( System on Chip ) technology to design the ASIC for civil analog walkie-talkie .

成功研制出工作频段为405～415MHz的对讲机功率放大器模块，采用F类开关功率放大器工作模式。

An Interphone power amplifier module with working band of 405 ~ 415MHz is developed successfully , using Class F switch mode power amplifier .

“碎片大厦”（Shard）和“对讲机”（WalkieTalkie）现在正成为这座城市最令人惊奇的景观。

The Shard and the Walkie Talkie now poke their way into the city 's most surprising views .

C150、C450无线电对讲机故障检修

Repairing for the Troubles of C150 / 450 Wireless Walkie Talkies

最后对验证系统进行了功能和通话测试，测试结果表明该验证系统满足DMR协议标准，完成了数字对讲机单呼和组呼功能。

And the test results show that the verification system meets the DMR protocol standard , and complete digital radio single call and group call feature .

本课题依据本人在Motorola软件中心对讲机软件的开发经验，分析和研究了嵌入式移动终端系统软件和应用软件的设计与实现。

Based on the experience of software development for interphone at Motorola software Center , the paper analyses and researches the design and implementation method of system software and application software of embedded mobile terminal .

基于APCOProject25标准的数字加密对讲机系统设计

Design of Digital Enciphered Intercom System based on APCO Project 25 Standard

本文对基于螺旋天线原理的对讲机外置天线做了细致的研究，并使用HFSS软件对该天线进行了仿真优化设计。

Hence , a stubby antennas of interphone , based on the theory of helical antenna and can operate at 420MHz ~ 460MHz , is simulated and optimum designed by using HFSS .

介绍一种数字无线对讲机的设计方案，系统以AMBE-1000作为该系统的核心。

This thesis introduces the design of a digital wireless interphone , uses Lucent AMBE-1000 as its core .

客户编程软件（CPS）是对讲机等无线通讯系统Radio配置系统的核心技术，实现C与C++代码的互访是CPS设计的研究热点之一。

The Customer Programming Software ( CPS ) is the core technology of radio configuration subsystem of the wireless communication system such as wireless transceiver . One of the most essential problems is how to implement the inter-accessing of C # code and C + + code .

当我们的飞机靠近跑道的时候，飞行员通过对讲机说：“对于那些对这个地区不熟悉的人，这里是德州的Lubbock”。

As we approached the runway , the pilot came on the intercom : " For those of you who are not familiar with the area , this is Lubbock , Texas .

地震发生后，我们的政府几乎帮不上忙，JuD设置了救助营，营外则由持有突击步枪及对讲机的男人负责巡守。

When the earthquake happened and our government did little to help , JuD set up relief camps patrolled by men with Kalashnikovs and walkie-talkies .

客户端程序实现对串口的智能控制：所设计的语音检测方法，能够识别音频信号有无，并且向计算机串口发送VHF操作信号，以控制对讲机PTT键按下或放开状态。

Second the client application program realizes intelligent controlling to serial port : the audio detection method can identify whether the audio signal existed or not and then according to the result transmit VHF signals by computer serial port for controlling the PTT ( switch ) of interphone .

本文介绍了无线通信中TDD双工方式的原理及技术特点，并设计了一种适合数字对讲机的TDD通信协议，陈述了自行设计研发的TDD数字对讲机的帧结构、帧同步和TDD通信协议的实现。

Principle and characteristic of TDD double mode in wireless communication is introduced , a TDD communication protocol adapted to digital handset is designed , and TDD frame structure , frame synchronization and realization of TDD communication protocol applied in self - developed digital handset is presented .

在传输网络中，音频适配器采用双音多频芯片MT8880实现数据格式的转换功能，对讲机则完成对转换后的音频信号收发功能；

In the transmission network , the audio adapter adopts MT8880 to transform the data format and the wireless interphone is to transmit and receive the audio signal .

伦敦金融城的天际线正在涌现不规则的形状，从罗杰斯勋爵的被称为“奶酪刨”（Cheesegrater）的Leadenhall大楼，到维诺里的位于芬丘奇街（FenchurchStreet）20号的“对讲机”（WalkieTalkie）大楼。

The City of London 's skyline is sprouting unusual shapes , from Lord Rogers " " Cheesegrater " Leadenhall Building to Mr Vi ñ oly 's " Walkie Talkie " at 20 Fenchurch Street .