摘要
北斗卫星导航系统与第五代地面移动通信(5G)系统都是国家重大基础设施。卫星无线电测定业务(Radio-Determination Satellite Service,RDSS)是北斗系统的特色服务,其出站信号位于S频段,与地面5G信号频率接近。由于5G基站发射信号的功率远高于北斗S信号的落地电平,因此会对北斗S信号造成干扰。从信号角度出发,研究地面5G对北斗S信号的影响及处理对策。分析了北斗S信号的特征,用等效载噪比评估了地面5G信号对北斗S信号的干扰,提出了3种提升北斗RDSS和地面5G兼容性的策略。仿真结果表明,在无遮挡条件下,经过干扰滤波处理后,北斗RDSS用户机与5G基站的最小安全距离为40 m。
Beidou Navigation Satellite System(BDS)and the 5th generation(5G)terrestrial mobile communication system are both major national infrastructures.Radio-Determination Satellite Service(RDSS)is the special service of BDS.Its outbound signal is in the S band,which is adjacent to the frequency band used by 5G signal.5G base station emission signal,whose power is much higher than that of BDS S-signal,will cause interference to BDS S-signal.The impact of 5G signal on BDS S-signal and its countermeasure are studied from the perspective of signal.Firstly,the characteristics of BDS S-signal are analyzed.Secondly,the impact of 5G signal on BDS S-signal is evaluated by the effective carrier-to-noise density ratio.Finally,three solutions are proposed to improve the compatibility of BDS RDSS and 5G.The simulation results show that the minimum safe distance between BDS RDSS user receiver and 5G base station is 40 m under no-shelter conditions and with interference filtering in the receiver.
作者
张天桥
葛侠
刘治君
张卫楠
ZHANG Tianqiao;GE Xia;LIU Zhijun;ZHANG Weinan(Beijing Satellite Navigation Center,Beijing 100094,China)
出处
《无线电工程》
北大核心
2021年第10期1037-1041,共5页
Radio Engineering
基金
国家自然科学基金资助项目(42004028)。
