Rail transit wireless mimo communication transmission system with signals bidirectionally fed into leaky cables

Abstract

The invention relates to a rail transit wireless MIMO communication transmission system of signal bi-directional feed-in leakage cable, and includes a first far-end radio frequency unit, a second far-end radio frequency unit, a first multi-port combiner, a second multi-port combiner, a radio frequency electro-optical converter, an optical fiber, a radio frequency photoelectric converter, a time delay compensation module, a third multi-port combiner, a fourth multi-port combiner, single bi-directional leakage cables, at least one first redundant backup far-end radio frequency unit, and at least one second redundant backup far-end radio frequency unit. The system is applied to rail transit communication to realize multithread signal transmission, can reduce half of the laying number of leakage cables, and has efficient MIMO performance, engineering cost is greatly reduced, and construction and maintenance are simplified. The rail transit wireless MIMO communication transmission system satisfies a requirement of uplink and downlink communication, is suitable for frequency division duplex and time division duplex communication, can be used for MIMO signal coverage of a rail transit communication system, and supports a situation of multi-frequency redundancy networking.

Description

technical field [0001] The invention relates to a rail transit wireless MIMO communication transmission system in which signals are bidirectionally fed into leaky cables, and belongs to the technical field of communication and electronics. Background technique [0002] The urban rail transit system is an important means to solve the pressure of urban transportation at present, and it is laid on a large scale in densely populated cities. The wireless communication transmission methods used in rail transit communication systems mainly include free antennas and leaky cables. Leaky cables are widely used because of their good uniform radiation characteristics, which greatly improve the safety and reliability of wireless communication. As the evolution direction of the next-generation rail transit communication system, MIMO technology will bring higher reliability, stability, throughput and the possibility of carrying multiple services to the system. [0003] The main scenarios ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the high cost and construction expenses caused by the laying of multiple leaky cables in the existing rail transit MIMO communication transmission system, and realize the situation of multi-frequency redundant networking and duplex communication, the purpose of the present invention is to provide a two-way signal feed-in Rail Transit Wireless MIMO Communication Transmission System Based on Leaky Cables

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