星地一体化网络干扰建模与性能分析  

Interference Modeling and Performance Analysis for Satellite-5G Networks

作　　者：方子希 李国彦[1] 吴海燕[1] 周文玉[1] FANG Zixi;LI Guoyan;WU Haiyan;ZHOU Wenyu(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Science and Technology on Communication Networks Laboratory,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]通信网信息传输与分发技术重点实验室,河北石家庄050081

出　　处：《无线电工程》2022年第12期2109-2115,共7页Radio Engineering

基　　金：装发重点实验室基金(6142104200101)。

摘　　要：针对星地一体化网络中5G上行信号干扰卫星地球站的问题,提出了基于随机几何理论的干扰建模与性能分析方法。定义了干扰环境中星地下行链路的性能衡量指标,即星地成功通信概率,并数学推导了Lutz信道模型下的星地成功通信概率闭式解。结合实际系统参数对所提干扰分析方法进行了数值仿真,由此定量分析了干扰卫星地球站接收机性能的影响因子。仿真结果表明,干扰源密度和信干噪比(Signal to Interference plus Noise Ratio,SINR)阈值是制约干扰环境中星地下行链路通信性能的关键因素。研究成果为星地一体化网络的干扰协调提供了理论基础。To deal with the problem that the 5G uplink signal interferes with the satellite earth station in the satellite-5G networks,interference modeling methods and performance analysis methods are proposed based on stochastic geometry theory.The performance metric of the satellite downlink in the interference environment is defined as the successful satellite-ground communication probability.The closed-form solution of the successful communication probability under the Lutz channel model is derived.Combined with the actual system parameters,the proposed methods are numerically simulated,and the factors affecting the receiver performance of the earth station are quantitatively analyzed.The simulation results show that the density of interferers and the SINR threshold are the key factors restricting the performance of satellite-ground downlink in the interference environment.The research results provide a theoretical basis for the interference coordination in satellite-5G networks.

关 键 词：卫星通信 5G 干扰 随机几何 无线通信 

分 类 号：TN927.2[电子电信—通信与信息系统]