高频段下的5G系统对地球探测卫星系统干扰研究

Study on Interference from 5G System with Earth Exploration Satellite Service System at High Frequency Band

为推动我国在5G系统热门候选频段24.25GHz—27.5GHz下的研究发展,分析5G系统在该频段下与其他系统的干扰共存问题,选取地球探测卫星系统作为研究对象,分析5G系统对该系统的干扰影响,并通过确定性计算得到了在两系统相距1.2km处5G系统的基站天线垂直方向角和地球探测卫星系统的地球站离轴角分别与干扰功率之间的关系,以及地球站离轴角分别处于10°、30°、45°时,干扰功率与两系统隔离距离之间的关系。根据地球站的干扰保护准则并结合仿真结果,可计算得出两系统同频共存时需要保持的最小隔离距离。

In order to promote the domestic research development of 5G system hot candidate 24.25GHz-27.5GHz band and analyze the interference coexistence problem of 5G system and other systems at the band, the earth exploration satellite is selected as research object, and the influence of 5G system on the satellite system is analyzed. The relationship between the vertical direction angle of base station antenna at the 5G system and the off-axis angle of earth station at the Earth exploration satellite in the interference power is calculated by the deterministic calculation when the two systems are separated by 1.2 km. Also, the relationship between interference power and inter-system isolation distance is derived when the off-axis angle of earth station is 10°, 30° and 45°, respectively. According to interference coexistence criteria and simulation results, the minimum isolation distance for the coexistence of the two systems at the same frequency band can be calculated.