Receiving device for receiving global system for mobile communications for railways (GSM-R) signals

Abstract

A receiving device for receiving global system for mobile communications for railways (GSM-R) signals adopts a double-channel input structure, wherein the frequency range of the signals received by an upgoing signal receiving channel is 885MHz-889MHz, the frequency range of the signals received by a downgoing receiving channel is 930MHz-934MHZ, the channels adopt the same structure, and the upgoing signal receiving channel is formed by six modules, namely an upgoing signal receiving antenna, an upgoing signal surface acoustic wave filter module, an upgoing signal low noise amplifier module, an upgoing signal ultra high frequency (UHF) receiver module, an upgoing signal mediate-frequency filter module and an upgoing signal mediate-frequency amplifier module; and a control unit performs channel selection by controlling an UHF receiver. The receiving device for receiving the GSM-R signals reduces manufacture cost, simultaneously can adapt to various complex working environments and provides solving schemes for GSM-R monitoring.

Description

technical field [0001] The invention relates to a GSM-R signal receiving device for receiving GSM-R (GSM for Railways) signals, in particular to improving its receiving performance in complex environments, capable of simultaneously receiving GSM-R signal uplink frequency band and downlink frequency band , and within the frequency range, program-controlled scanning of its channels. Background technique [0002] GSM_R is a digital wireless communication system specially developed for railway applications. It is a kind of dedicated mobile communication and is dedicated to daily railway communication. In my country's railways, the uplink frequency band is 885MHz-889MHz, and the downlink frequency band is 930MHz-934MHz. The uplink frequency band refers to the terminal transmission frequency, and the downlink frequency band refers to the terminal receiving frequency. The channel bandwidth is 200KHz. The system as a whole includes the network subsystem, base station subsystem, Oper...

AI Technical Summary

Problems solved by technology

The usual monitoring is to monitor the GSM-R signal along the railway line with complex monitoring equipment on the mobile monitoring vehicle to determine the interference source and eliminate it. This method not only requires a lot of manpower and material resources, but also for complex environment There are limitations in monitoring, especially in the case of complex terrain, ambient temperature and interference environment, there are many unfavorable factors for signal acquisition

At the same time, because most of the detection equipment adopts receiving devices with complex structures and functions, Figure 2A and 2B The structural and functional block diagrams of two commonly used receiving devices are given. For the monitoring system specially used to monitor GSM-R signals, it wastes resources and increases the cost of the monitoring system

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