数字集群移动通信系统 digital trunking communication
数字集群移动通信系统作为专用移动通信的高级阶段，受到了广泛的关注。
Digital trunk mobile system is the advanced level of the special mobile communication, and it has attracted attention abroad.
根据市场预测的结果，论文对重庆市数字集群移动通信网络进行了具体规划设计。
On the basis of market forecast results, the paper marks out Chongqing digital trunking mobile communication networks.
研究了陆地集群无线通信（TETRA）数字集群移动通信系统的语音压缩编解码算法的基本原理。
This paper describes the basic theory of speech compression encoding and decoding algorithm in TETRA (terrestrial trunked radio) system.
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