摘要
为了提高无人机毫米波波束覆盖区域内的通信容量,改善覆盖区域内用户通信质量,本文结合均匀平面阵列天线,提出采用一种基于目标覆盖区域量化的波束优化设计方法。该方法首先将目标区域进行量化,根据理想波束增益得到理想混合预编码向量;其次,以实际预编码向量与理想预编码向量之间的均方误差最小化为目标获得最优波束,进一步利用改进的正交匹配跟踪算法去拟合产生适合实际系统的波束成形矢量。仿真表明该波束设计方法在收敛速度和收敛精度上均优于传统方法,并可以获得更好的波束形状和波束增益,从而提高无人机目标覆盖区域内用户的通信质量。
In order to improve the communication capacity and the users’communication quality of unmanned aerial vehicles(UAV)coverage area with millimeter-wave beam,combined with uniform planar array antenna,a beam optimization method based on the quantization of target area is proposed in this paper.The method quantizes the target region firstly,and obtains the ideal hybrid precoding vector according to the ideal beam gain.Secondly,the mean square error between the actual and ideal precoding vector is minimized to obtain the optimal beam,and further an improved orthogonal matching pursuit(OMP)algorithm is used to fit the beamforming vector suitable for the actual system.Simulation proves that the proposed beam design method is superior to the traditional method in convergence speed and convergence precision,at the same time,this method can obtain better beam shape and gain for improving the communication quality of users in the coverage area of the UAV.
作者
王磊
仲伟志
顾勇
朱秋明
陈小敏
Wang Lei;Zhong Weizhi;Gu Yong;Zhu Qiuming;Chen Xiaomin(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China;College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 211106,China)
出处
《信号处理》
CSCD
北大核心
2019年第7期1152-1159,共8页
Journal of Signal Processing
基金
航空科学基金(2017ZC52021)
南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20181503)
中央高校基本科研业务费专项资金(NS2017066)
关键词
无人机
毫米波
波束覆盖
波束设计
unmanned aerial vehicle(UAV)
millimeter wave
beam coverage
beam design
