基于自适应算法的三维波束赋形技术

Research on 3D-Beamforming Based on Adaptive Algorithm

针对每个移动终端进行动态的三维波束赋形,为了使三维波束主瓣对准期望用户并且在干扰用户方向形成零陷,构建了均匀平面阵的二维阵列信号模型,研究了基于最小均方误差算法的全局自适应算法,并在此基础上提出了基于降维的局部自适应算法.2种自适应三维波束赋形算法可以动态地调整阵列单元的权值,自适应地改变天线阵列的方向图,为用户提供实时的跟踪服务.仿真结果表明,在一定数量的阵列天线单元的条件下,2种算法均可以实现针对期望用户的自适应三维波束赋形.

3D-beamforming could use the vertical dimension for antenna pattern adaption, it can provide an additional degree of freedom for transmission signal optimization. A global adaptive 3D-beamforming algorithm based on uniform planar array and a dimension reduction vision algorithm based local adaptive algorithm was proposed. 3D-beamforming algorithm could adjust the antenna weight adaptively according to the user＇s move or the change of the wireless condition and alter the beam pattern in real time. Simula- tion shows that the 3D-beamforming aimed at specific user can be implemented by both of the proposed algorithms under a certain number of antenna arrays.