Research on the Interference and Coexistence of CBTC in 1.8 GHz Band

  • Ruichen XuEmail author
  • Xiao Peng
  • Xiaobo Wang
  • Ji Fang
  • Bo Yuan
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 211)


The current Communication Based Train Control (CBTC) system is assigned to 2.4 GHz unlicensed band, which can be easily interfered. To enhance safety, the state radio regulatory commission assigned 1785 MHz–1805 MHz band to CBTC system. However, under the interference of first use telecommunication system in identical and adjacent frequency, it’s a problem to guarantee the safety isolation distance between interfere and interfered party, so that to improve CBTC system safety. To solve this problem, this paper firstly analyzes relative domestic frequency assignment situation to determine interfere party, and then finds out study scenario based on field testing data. Afterward, obtain isolation distance between interfere and interfered party by ACIR modeling and deterministic calculations. Based on the research above, the advice that CBTC system should be assigned in 1790 MHz–1800 MHz band is given.


1.8 GHz TDD-LTE CBTC Interference Isolation distance 


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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2018

Authors and Affiliations

  • Ruichen Xu
    • 1
    Email author
  • Xiao Peng
    • 1
  • Xiaobo Wang
    • 1
  • Ji Fang
    • 1
  • Bo Yuan
    • 1
  1. 1.The State Radio Monitoring Center Testing CenterBeijingChina

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