700MHz频段5G网络广播电视系统干扰问题研究

doi:10.11959/j.issn.1000-0801.2022274

Abstract

Abstract:

There is a risk of co-channel interference from broadcast TV systems in the operation of 5G networks in the 700 MHz band, which seriously affects the network performance.Firstly, from the frequency configuration of broadcast TV system, the principle of interference by broadcast TV system in 5G network in 700 MHz band was discussed.Then, the interference characteristics of broadcast TV system were analyzed, and the interference identification algorithm of broadcast TV system based on frequency domain information was proposed for these characteristics.Finally, the accuracy of the algorithm identification was tested and verified to achieve the goal of interference optimization and avoidance through interference identification.

Key words: 700 MHz band, co-channel interference, interference identification

CLC Number:

TN929.5

Peijin LYU, Yun LU, Xiaokang YANG, Dan YANG, Yiyan YIN, Zhengyi GUO. Research on broadcast and TV system interference of 700 MHz band in 5G network[J]. Telecommunications Science, 2022, 38(11): 106-112.

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References 10

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子载波间隔	带宽
子载波间隔	5 MHz	10 MHz	15 MHz	20 MHz	25 MHz	30 MHz
15 kHz	25	52	79	106	133	160
30 kHz	11	24	38	51	65	78
60 kHz	N.A	11	18	24	31	38

中心频点/MHz	702	706	710	714	718	722	726	730	734
对应PRB位置（30 MHz带宽配置）	—	13	35	57	80	102	124	146	—

开始时间	RRC连接平均连接用户数/个	RRC连接最大连接用户数/个	CQI优良率	4G总流量/GB	5G总流量/GB	5G分流比
干扰规避功能开启前	45.682 2	168	96.94%	292.25	9.98	3.30%
干扰规避功能开启后	61.501 7	199	97.44%	291.70	13.61	4.46%

Research on broadcast and TV system interference of 700 MHz band in 5G network

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