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铁路通信信号工程技术 ›› 2023, Vol. 20 ›› Issue (8): 32-36.DOI: 10.3969/j.issn.1673-4440.2023.08.007

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下一代铁路移动通信中公专网系统间干扰协调的研究

 张 驰1，寇 鸣2，刘 兴2，郭瑞彬3   

  1. 1．北京全路通信信号研究设计院集团有限公司，北京 100070;
    2．中国铁路武汉局集团有限公司，武汉 430064；
    3．北京交通大学电子信息工程学院，北京 100044
  • 收稿日期:2022-06-17 修回日期:2023-06-15 出版日期:2023-08-25 发布日期:2023-08-25
  • 作者简介:张驰（1984—），男，高级工程师，硕士，主要研究方向：铁路无线通信，邮箱：zhangchi@crscd.com.cn。
  • 基金资助:
    中国国家铁路集团有限公司重大科研项目（P2021G012）

Research on Interference Coordination Between Public and Private Network Systems in Next Generation Railway Mobile Communication

 Zhang Chi1,  Kou Ming2,  Liu Xing2,  Guo Ruibin3   

  1. 1. CRSC Research & Design Institute Group Co., Ltd., Beijing    100070, China；
    2. China Railway Wuhan Group Co., Ltd., Wuhan    430064, China；
    3. School of Electronic and Informaiton Engineering, Beijing Jiaotong University, Beijing    100044, China
  • Received:2022-06-17 Revised:2023-06-15 Online:2023-08-25 Published:2023-08-25

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摘要： 针对下一代铁路移动通信技术中公专网系统间存在频率干扰的情况，研究干扰产生的原因、发生干扰的场景并分析抑制干扰采用的方法，研究3GPP中基站隔离度的要求并给出公转网无线系统部署要求，以及驻波比（VSWR）、带外信号抑制比和滤波器插入损耗等参数相互制约的关系，通过仿真得出三者间的关系以及铁路专网无线通信系统滤波器指标要求。

关键词: 邻信道干扰, 杂散干扰, 带外抑制, 滚降, 频分多路复用, 相邻通道泄漏比, 相邻信道选择性

Abstract: This paper mainly focuses on the frequency interference between public and private network systems in the next generation of railway mobile communication technology, and studies the causes of the interference, the scenarios of the interference and the methods to suppress the interference. The requirements of base station isolation degree in 3GPP are studied and the deployment requirements of wireless system between public and private networks are given. This paper shows that the parameters of VSWR, out-of-band signal rejection ratio and fi lter insertion loss are mutually restrictive. Through simulation, the relationship among the three parameters and the fi lter index requirements of wireless communication systems in the railway private networks are obtained.

Key words: adjacent channel interference, spurious interference, out-of-band suppression, roll down, Frequency Division Multiplexing (FDM), Adjacent Channel Leakage Ratio (ACLR), Adjacent Channel Selectivity (ACS)

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