The bandwidth efficiency and ability to combat the effects of frequency selective channels are critical issues in the design of wideband wireless digital communications system.
在宽带无线数字通信系统中，影响信息高速传输的最主要的一类干扰是由信道的多径效应所引起的频率选择性衰落。
The secure, high-capacity, jam-resistant wireless (non-satellite) system connects users with both digital data and voice communications.
这种安全、高容量、抗阻塞的无线（非卫星）系统通过数字数据以及话音通信使战场用户互连。
In the model communications system, the modulation process also is loaded the digital signal in the carrier scope value, the carrier frequency or on the carrier phase.
在典型的通信系统中，调制过程是数字信号加载在载波的幅度值、载波的频率或者载波的相位上。
The design of embedded software of MFMC and the communicating protocols about all communications in digital laboratory system are included in this part.
这一部分主要包括多功能主控制器（MFMC）内嵌软件实现和各部分通信的通信协议的制订。
As the core mobile communications technology, one of the digital modulation technique is to achieve high-speed, highly efficient mobile communication system and an important guarantee.
而作为移动通信核心技术之一的数字调制技术是实现高速、高效的移动通信系统的重要保证。
Digital communications BER test system based on bit comparison is designed.
设计了逐位比较型数字通信误码测试系统。
A robot digital machining system (RDMS) used to machine complex frequency selective surfaces (FSS) in the aerospace manufacturing and satellite communications is introduced in this paper.
介绍了一种在航空制造和卫星通信领域用于复杂频率选择表面加工的机器人数字化加工系统(RDMS)。
In electric power system, Digital Program Controlled Exchange has been used broadly because communications requests high reliability.
在电力系统中，由于对通信的可靠性要求较高，因此程控数字交换机正在得到广泛的应用。
Global system for mobile communications, the most widely used digital mobile phone system and the DE facto wireless telephone standard in Europe.
全球移动通信系统，使用最广泛的数字手机系统和欧洲事实上的无线电话标准。
As speech is the most important, efficient and convenient way in communications, speech communication holds the importance in modern digital communication system.
其中，通过语音传递信息是人们最重要、最有效和最方便的通信和交流方式，语音通信在现代数字通信系统中占有重要的地位。
System hardware circuit audio digital signal source achieve this functions: sound signals, sound intensity level control, data communications, liquid crystal display, alarm and power.
系统硬件电路包括音频数字信号源实现声音信号产生、数字声强级控制、多机数据通信、液晶显示和电源等模块单元。
Fieldbus intelligent field devices are connected and digital automation system, two-way transmission, multi-branch structure of the communications network, based on smart meters.
现场总线则是衔接智能现场设备和主动化系统地数字式、双向传输、多分支构造地通讯收集，其根底是智能仪表。
Fieldbus intelligent field devices are connected and digital automation system, two-way transmission, multi-branch structure of the communications network, based on smart meters.
现场总线则是衔接智能现场设备和主动化系统地数字式、双向传输、多分支构造地通讯收集，其根底是智能仪表。
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