700兆赫频率迁移项目中地面数字电视与广电5G邻频干扰案例的排查与处理

Investigation and Handling of Adjacent Interference Cases between Digital Terrestrial Television and CBN 5G in the 700MHz Frequency Migration Project

本文以解决700兆赫频率迁移项目中甘肃省定西市广电5G基站用户接入服务质量劣化为案例展开研究。通过测试排查定位,最终确定是通信基站广电5G上行信号与发射台地面数字电视36频道的广播信号之间存在邻频干扰所致。经过仿真计算,我们试制了抗干扰带通滤波器并在通信基站安装后,有效解决了该问题。本研究对于改善广电5G基站用户接入服务质量具有重要意义,同时为类似问题的解决提供了有益的参考。

This article takes the case study of solving the deterioration of user access service quality for 5G base stations in Dingxi,Gansu Province in the 700 MHz frequency migration project.Through testing and investigation,it is finally determined that the problem is caused by adjacent frequency interference between the uplink signal of the communication base China Broadcast Network’s 5G and the broadcasting signal of the digital terrestrial television Channel 36 of the transmitting station.After simulation calculation,we have developed an anti-interference band-pass filter and installed it in the communication base station,effectively solving the problem.This study is of great significance for improving the quality of user access services for China Broadcast Network’s 5G base stations,and provides a useful reference for solving similar problems.