Abstract：Research purposes: In some local railways, enterprises or logistics park special lines and port distribution railways, flat shunting operations at multiple stations and transfer train running operation coexist. The two kinds of operations require the corresponding wireless communication system to provide technical support. At present, the scheme of setting up both a flat shunting digital wireless communication system and a special mobile communication system is mostly adopted, which can meet the requirements, but the investment is relatively high. In order to save the project construction cost and simplify the equipment configuration, it is very necessary to study adopting a set of wireless communication system to meet the needs of flat shunting communication service and wireless dispatching communication service of multiple shunting stations and transfer train running sections at the same time. Research conclusions: (1) The wireless communication system for multi-station flat shunting follows the technical system and working frequency band of the existing flat shunting digital wireless communication system, which accords with current technology policy. (2) Multiple digital repeaters based on digital mobile radio (DMR) co-frequency relay technology are adopted to expand the wireless signal originally used for covering flat shunting operation in the station to each station and section within the operation scope by means of IP interconnection, so as to realize unified wireless signal coverage in multiple shunting stations and transfer train running sections and eliminate wireless signal blind areas. (3) Through simulation, it is verified that the audio receiving and demodulation circuit of the system terminal equipment can separate the co-frequency interference signal and suppress the co-frequency interference by using ICA algorithm. (4) The research results can provide reference for the engineering design of local railways, enterprises or logistics park special lines and port distribution railways, as well as the manufacturing of wireless communication system equipment for multi-station flat shunting.
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2022, Vol. 39 
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