Railway mobile communication time service system based on Beidou+GPS double-signal synchronous clock

Abstract

The invention provides a railway mobile communication time service system based on a Beidou+GPS double-signal synchronous clock. The system comprises a power module, a Beidou / GPS antenna feed part, aBeidou / GPS receiver, a main control time keeping and time service circuit and an interface module. The power module supplies power to the Beidou / GPS receiver, the main control time keeping and time service circuit and the interface module. The system further includes a main control time keeping and time service electromagnetic compatibility circuit electrically connected with the main control timekeeping and time service circuit, an interface module electromagnetic compatibility circuit electrically connected with the interface module, and a power supply module electromagnetic compatibility circuit electrically connected with the power module. A large number of designs are made in aspects such as antenna feed protection, signal interface protection and power protection, which ensures thehigh anti-interference performance of interfaces. A large number of designs are made in the interfaces and circuits, which reduces the conduction interference and radiation interference of synchronousclock source equipment and enhances the ability to resist external harmonic current transient pulse, electrostatic discharge, electric fast transient pulse groups, surge impact and other interferences.

Description

technical field [0001] The invention belongs to the field of railway mobile communication time synchronization, and in particular relates to a railway mobile communication time service system using a Beidou+GPS dual-signal synchronous clock. Background technique [0002] The railway mobile communication time synchronization clock source has the functions of time service and time keeping, and provides high-precision and high-reliability reference time signals for the railway communication basic bearer network and various subsystems of integrated services. It is an indispensable support system for the railway communication network. [0003] As the technical requirements for high-speed rail mobile communication are getting higher and higher, traditional network services have been difficult to meet the requirements of railway development, and the railway mobile communication system needs to be further evolved. meet the requirements of the next generation of railway mobile commun...

AI Technical Summary

Problems solved by technology

[0007] The current synchronous clock source used in the railway system is only a GPS receiver, the time accuracy is relatively low, the external interface is also single, the function is simple, and the complexity of the circuit is low, so its electromagnetic compatibility design is relatively simple

[0008] The next-generation synchronous clock source of the railway uses Beidou and GPS receivers, which require high time accuracy, rich external interfaces, diverse functions, and high circuit complexity

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