Analysis of the solution to the interference of subway communication signal

Yi, Chengdong; Tang, Kai; Cao, Xiaoke; Zhang, Fangwen; Bian, Ting; Yang, Mi

doi:10.1109/icmcce51767.2020.00521

Cited by 1 publication

(1 citation statement)

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“…The authors of [ 31 ] propose a method to improve the anti-electromagnetic interference ability of the entire railway vehicle from the grounding and wiring aspects. In [ 32 , 33 ], the authors proposed that signal interference can be solved by establishing a shielding network or adding a filter to the base station.…”

Section: Introductionmentioning

confidence: 99%

Analysis of LTE-M Adjacent Channel Interference in Rail Transit

Wang²,

Zhang

et al. 2022

Sensors

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Long Term Evolution-Metro (LTE-M), as a special communication system for train control, has strict requirements on adjacent channel interference (ACI). According to the 3rd Generation Partnership Project (3GPP) protocol of the European Telecommunications Standards Institute (ETSI) standards, this paper presents the required isolation degree for LTE-M systems to resist ACI. Aiming at the scenario of leaky cable transmission and antenna transmission adopted by the underground LTE-M system of the subway, the isolation degree required for LTE-M system deployment is deduced by combining the channel description with the principle of ACI. For the coexistence of a LTE-M system and an adjacent cellular system in a subway ground scenario, the Monte-Carlo (MC) method is used to simulate several conceivable scenarios of the LTE-M system and the adjacent frequency cellular system. In addition, the throughput loss of the LTE-M system is estimated by considering signal to interference plus noise ratio (SINR). Simulation results demonstrate that adjacent frequency user equipment (UE) has negligible small interference with the LTE-M underground system when using the leaky cable radiation pattern, whereas for the LTE-M ground system, the main interference comes from the adjacent frequency UE to the LTE-M base station (BS). Finally, interference avoidance solutions are presented, which can be utilized as a reference in the design and deployment of LTE-M systems in the rail transit environment.

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Section: Introductionmentioning

confidence: 99%