A communication method and system for resisting co-channel interference signals

Abstract

The present invention proposes a communication method and system for resisting co-channel interference signals. The co-channel interference signal, the first useful signal transmitted by the main base station and the first cancellation signal are received from the base station, and based on the second cancellation signal and the second cancellation signal in the main base station The useful signal is separated from the same-channel interference signal, the second useful signal is a copy of the first useful signal, and the third cancellation signal is generated based on the same-channel interference signal, and the master base station superimposes the third cancellation signal and the second useful signal and transmits it. Receive the same-frequency interference signal in real time, generate the third cancellation signal, superimpose the third cancellation signal and the second useful signal and then transmit it, so as to realize the anti-jamming signal at the transmission end of the communication system; not only ensure the hot backup redundancy of the communication system, It also improves the utilization rate of the secondary base station, and at the same time, the method can dynamically cancel the interference signal, and can deal with sudden co-channel interference signals, and the cost is low, and no new equipment needs to be added to the existing hot standby redundant system.

Description

technical field [0001] The invention belongs to the field of communication, and in particular relates to a communication method and system for resisting co-channel interference signals. Background technique [0002] With the development of modern communication technology and its application in the field of railway rail transit, the role of railway wireless communication system is becoming more and more important, and it is an important means to ensure the information exchange between trains and ground systems. The ground system needs to obtain all kinds of dynamic data of the train in time to realize functions such as train dispatching and command, remote fault diagnosis, and remote maintenance. Therefore, the reliability, availability, and maintainability of the railway wireless communication system are high. In the field of railway rail transit, in order to ensure the stability and safety of long-term train operation, the key equipment of the railway wireless communication...

AI Technical Summary

Problems solved by technology

In railway passenger stations or freight stations, railway wireless communication systems often face interference from external co-frequency signals, which greatly affects the communication rate and communication quality of railway communication systems

In order to solve the problem of external co-frequency interference at the site, two methods can usually be used to analyze, locate and eliminate external co-frequency interference sources. One is to use a hand-held frequency scanner to perform regular frequency scanning. This method is suitable for dealing with long-term fixed external co-frequency sources. Interference sources cannot deal with sudden external co-channel interference sources; the second is to build a separate spectrum monitoring system to implement long-term real-time monitoring, but this method will increase the network construction cost and installation space of the railway station communication system, which is not conducive to large-scale promotion application

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