In 1998, ETSI publicized TETRA protocal, which is a standard of digital trunked radio communication system.
TETRA协议是欧洲电信标准协会(etsi) 1998年公布的一种数字集群通信系统标准。
As one of the most famous kinds of digital trunked communication system, TETRA's efficiency and security have been cared more and more.
TETRA作为最著名的数字集群通信系统之一，其高效性和安全性得到了越来越多的关注。
Therefore, it has practical significance to develop TETRA digital trunked system equipment which has independent intellectual property rights.
因此，开发具有自主知识产权的TETRA数字集群系统设备具有实际意义。
Recent years, with the rapid development of communication, the research of digital trunked radio communication system becomes more and more important.
近年来，随着通信的飞速发展，作为专用移动通信系统的数字集群通信系统的研究也变得越来越重要了。
In digital trunked system, the delay performance of packet data service is greatly affected by the design of system's parameters and the network load.
数字集群系统的参数设计和网络负荷对分组数据业务的延迟具有很大的影响。
TETRA digital trunked systems provide secure, reliable and efficient voice and data communications, which are being widely used in many countries around the world.
TETRA数字集群系统提供安全、可靠以及高效率的语音和数据通信，在全球许多国家得到了广泛的应用。
A digital trunked communication system is applied in Guangzhou Metro Line 2. The composition and merit points of the system and the functions of its principal equipment is introduced.
介绍了数字集群系统在广州地铁二号线的应用情况，从系统构成、主要设备功能及优点等方面进行了介绍。
As the digital times is coming, many function of the former analog trunked system can't satisfy the demand of people, it is necessary for us to research our own digital trunked system.
随着数字时代的到来，原有的模拟集群的许多功能已经不能满足人们的需求，研制我们自己的数字集群系统是非常必要的。
The latest generation of the digital trunked system TETRA, which is defined by the European Telecommunications Standards Institute (ETSI), is one of the most advanced mobile communication systems.
ETSI发布的欧洲新一代全数字集群系统TETRA是当今最先进的移动通信系统之一。
The digital handset studied in this thesis can provide another resolvent based on TDD for the Trunked communication system and cordless phone system.
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.
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。
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