一种3D-MIMO动态自适应码本设计方法

摘要

全维大规模三维多输入多输出天线(3D-MIMO)系统可以显著地提高系统的空间分辨率和功率效率,降低干扰.基于平面大规模天线阵列,本文提出了一种考虑大尺度衰落且δdB衰落波束覆盖区域的动态覆盖区域非对称的、新颖的3D-MIMO动态自适应的直积码本设计方法.本文方法从基站覆盖的边缘开始,逐次计算每个码字,加入码本,码本的覆盖区域逐渐扩大,直到码本满足基站的覆盖要求.通过对比传统的DFT码本,分析了所提码本的特性,结果显示所设计的码本可以有效地将水平面分割成环形区域,并提高了小区边缘的波束覆盖密度.最后分析了所提方法设计码本的大小与衰减值δdB以及天线数的关系.%Full dimension massive multiple-input multiple-output(MIMO) system can significantly improve spatial resolution,reduce inference and improve power efficiency.When uniform planar array is configured at the base station and path loss is taken into consideration,this paper proposes a nonsymmetrical,dynamic and adaptive codebook design method based on the Kroneeker product codebook.The method requires that the amplitude of the beam coverage area is not less than δ dB attenuation of that of the beam center.Starting from the edge of the coverage of the base station,the proposed method calculates each code word and puts it into codebook,thereby leading to larger coverage until the whole area is covered.Compared with the conventional DFT codebook,characteristics of the proposed codebook are analyzed.The new codebook can effectively partition the area into several circular areas and improve the density of beams at the edge of the cell.Finally,the size of the proposed code is analyzed in terms of δ dB attenuation and number of antennas.