基于交替投影实现空地协同通信的波束成形技术研究

Research on air to ground communication system using alternating projection method for antenna’s beam shaping

随着第五代移动通信技术(5G)的产业化发展,大规模MIMO应用越来越成熟。相控阵天线由于其阵列天线的特性,也走出雷达领域,在无线通信领域中的得到越来越广泛地应用。相控阵天线具有多阵元、高增益和成熟的波束赋行能力等特点,尤其在特种通信和应急通信中得到青睐。介绍了基于5G相控阵天线的特种通信系统,并针对空地远距离通信场景进行了分析,说明了空地通信的盲区问题和零点填充的重要意义。提出了采用交替投影算法来实现主瓣和第一旁瓣零点填充的方法。结合一款1×12阵元的相控阵天线进行了仿真结果对比和验证,得到了良好的填充效果,解决了远距离通信覆盖区域的盲区问题,拓展了覆盖区域的范围和连续性。

With the industrialization and marketing development of the fifth generation mobile communication technology(5 G),massive MIMO technology application is more and more mature.Phased array antenna,because of its array antenna characteristics,has also stepped out of the radar field,and is more and more widely used in wireless communication.Phased array antenna has multiple array elements,high gain and mature beam-forming ability,and it has great performance in special communication and emergency communication.A special communication system based on 5 G phased array antenna is introduced,the long-distance air-to-ground communication scene is analyzed,and the blind area of communication and the significance of null filling is explained.A method to fill nulls between the main lobe and the first side lobe with alternating projection algorithm is presented.The simulation results of a 1×12 phased array antenna are compared and verified,and the null-filling effect is obtained.The blind area problem in the coverage area of long-distance communication is optimized,and the coverage area range and continuity are expanded.