Optical fiber direct transport station with common/different-frequency forwarding function

Abstract

An optical fiber direct amplifying station which has same / different frequency transmission function comprises a near-end machine and a far-end machine which are connected with optical fiber. In the near-end machine, three ends of the circulator are respectively connected with a first frequency receiving / transmitting channel of the duplexer, a radio frequency output end of the optical fiber and a first input end of the multiplexer. A second input end of the multiplexer is connected with a second frequency transmitting channel of the duplexer, and the output end is connected with a radio frequency input end of the optical module. In the far-end machine, the input end of the shunt is connected with the radio frequency receiving end of the optical module, and a first frequency output end of the shunt is connected with the input end of a first main power amplifier. A second main power amplifier is connected between a second frequency output end of the shunt and a second frequency receivingchannel of the duplexer. The output end of the low-noise amplifier is connected to the radio frequency transmission end of the optical module. The three ends of a first radio frequency switch of which the switching is controller by a controller are respectively connected with the first frequency receiving / transmitting channel of the duplexer, the input end of the low-noise amplifier and the output end of the first main power amplifier.

Description

technical field [0001] The invention relates to an optical fiber repeater with same-frequency and different-frequency forwarding functions, in particular to an optical fiber repeater with same-frequency and different-frequency forwarding functions used in a railway train wireless dispatching communication system. Background technique [0002] Railway train wireless dispatching communication system is an important equipment to ensure traffic safety. The system mainly includes dispatching switchboard, station (base station) equipment, locomotive equipment, handheld equipment, etc. With the continuous improvement of railway production and operation efficiency, transportation safety requirements, and communication modernization level, the railway train wireless dispatching communication system must not only realize voice communication functions such as train wireless dispatching, railway station yard shunting communication, and railway section mobile communication, but also It a...

AI Technical Summary

Problems solved by technology

However, the existing relay equipment does not have the broadband signal forwarding function of both same-frequency forwarding and different-frequency forwarding, and cannot meet the requirements of the railway train wireless dispatching communication system for voice communication and data transmission in sections of different systems. need

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