WJB-I type GSM-R digital optical fiber repeater

Abstract

The invention discloses a WJB-I type GSM-R digital optical fiber repeater. The repeater comprises a remote terminal, the remote terminal is connected with a mobile terminal; uplink signals of the mobile terminal are received through a far-end signal receiving module. The down-conversion to low-intermediate frequency I / Q signals are converted into a digital signal by a high-speed large-dynamic DACconversion module I; the digital signal is subjected to digital signal processing by a FPGA digital signal processing module I; then, the signals are transmitted to a near-end machine through the inverse process and return to a base station, wherein the digital signal is converted into an optical signal by an optical module, the optical signal is sent to the remote terminal through an optical fiber, the far-end machine is connected with a baseband processing unit, and the optical signal is subjected to deframing recovery by the baseband processing unit and then is sent out by a DAC signal transmitter, so that the signal coverage quality of the equipment is improved to a new level while the high reliability and stability of the equipment are realized. Convenience is provided for a signal coverage networking mode and engineering construction, and the wireless signal coverage of complex terrains such as tunnels and mountainous areas along a railway is achieved.

Description

technical field [0001] The invention relates to the field of railway signal transmission, in particular to a WJB-I type GSM-R digital optical fiber repeater. Background technique [0002] At present, the domestic analog repeater market has shown a low-cost competition situation. With the further reduction of the cost of the digital repeater, the digital repeater will gradually replace the analog repeater. The digital repeater has the characteristics of strong networking ability, strong coverage ability, low noise, low power consumption, convenient debugging, and low failure rate. After several years of development, it has become mature and is indispensable in the construction of public 2G / 3G networks. lack. [0003] In the wireless network coverage along the railway, in the existing technology, the digital optical fiber repeater station cannot expand the wireless network coverage without increasing the number of base stations, and cannot be used for the reinforcement of th...

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Problems solved by technology

[0003] In the wireless network coverage along the railway, in the existing technology, the digital optical fiber repeater station cannot expand the wireless network coverage without increasing the number of base stations, and cannot be used for the reinforcement of the blind and weak areas of the interval, resulting in tunnels along the railway, Wireless signal coverage problems in complex terrain such as mountainous areas

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