As a communication device between people and vehicles,as well as between vehicles and the outside world,the car mounted T-Box can achieve functions such as making and receiving calls,sending and receiving short messages,voice control,and voice broadcasting,enhancing user experience and services.This article studies a vehicle terminal device based on Tiantong communication,Beidou short message communication,and dual frequency naviga-tion.In environments with weak ground base station signals,using dual frequency navigation and gyroscopes to calcu-late the vehicle's orientation,the antenna can automatically point to the satellite for Tiantong data flow communication and Beidou short message emergency communication,achieving good emergency communication quality.At the same time,the design concept of the integrated terminal was described in detail.
Tiantong communicationBeidou short message communicationdual frequency navigationintegration
NETL
NSTL
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