基于TETRA数字集群移动通信系统开发的TETRA终端，通过数据业务可以发送和接收状态消息和短数据业务消息，利用短数据业务完成终端导航定位功能。
Terminal based on TETRA digital trunking mobile communication system could send and receive status and short data service message, and achieve navigation and location through short data service.
系统硬件采用三菱公司Q系列plc、图示操作终端F970GOT、智能定位模块QD 75 M4及交流伺服驱动单元。
The hardware of the system is composed of Q-series PLC, graphic operation terminal F970GOT, intelligent positioning module QD75M4, and AC servo drive unit from Mitsubishi.
而研究卫星定位系统终端使用的天线具有重要的价值与意义，特别是天线的宽带化、小型化技术。
So, it is very important for us to do some research on the satellite navigation and positioning system antenna especially on the broadbandization and miniaturization technology.
应用推荐