Abstract: In order to ensure the safe and efficient operation of high-speed railways as well as the radio communication services to on-board passengers, both the 5G-R system and the public network system in the railway tunnel are required to ensure proper coverage. As the space within the tunnel is limited, the equipment of the 5G-Rsystem and the equipment of the public mobile communication system share the tunnel chamber, and the leaky cables of these two systems need to be installed on the tunnel wall of the same side. Therefore, this paper studies and analyzes the interference effect of the radio signals of the public network system and the Unicom LTE system in adjacent frequencies of the 5G-R system on the 5G-R system from the perspectives of spurious emission and blocking interference. It also defines the safe isolation distance between the public network equipment and the 5G-R equipment, which provides theoretical basis for the implementation of 5G-R and public network communication systems for coverage projects in railway tunnels in the future.

Key words: public radio communication, 5G-R, spurious emission, blocking interference, leaky cable

摘要： 为在确保高铁安全、高效地运营的同时，也能保证车内乘客的无线通信服务，铁路隧道内5G-R系统与公网系统均需保证良好覆盖。且由于隧道内空间有限，5G-R系统与公众移动通信系统的设备共用隧道洞室、两系统的漏缆需安装在同侧隧道壁上。因此，从杂散干扰、阻塞干扰两个方面，研究分析公网与铁路5G-R邻频的联通LTE系统无线信号对5G-R的干扰影响，明确公网设备与5G-R设备的安全隔离距离，为今后5G-R及公网通信在铁路隧道内覆盖工程实施提供理论支撑。

关键词: 公众无线通信, 5G-R, 杂散干扰, 阻塞干扰, 漏缆