论文标题
近场MMWAVE MIMO通信系统的层次结构代码书设计
Hierarchical Codebook Design for Near-Field MmWave MIMO Communications Systems
论文作者
论文摘要
具有模拟或混合模拟/数字体系结构的通信系统通常依赖于预定义的代码手册来执行波束形成。随着天线阵列的大小的增加，在近场情况下球形波前的特性不可忽略。因此，有必要设计一个适应近场场景的代码簿。在这封信中，我们在近场情况下研究了层次结构码设计方法。我们开发了一种转向光束增益计算方法，并设计了低层代码簿，以满足菲涅尔区域的覆盖范围。对于上层代码手册，我们提出了束旋转和光束重新定位方法，以在目标位置放置任意梁图案。仿真结果表明了拟议的近场层次代码书设计的优越性。
Communications system with analog or hybrid analog/digital architectures usually relies on a pre-defined codebook to perform beamforming. With the increase in the size of the antenna array, the characteristics of the spherical wavefront in the near-field situation are not negligible. Therefore, it is necessary to design a codebook that is adaptive to near-field scenarios. In this letter, we investigate the hierarchical codebook design method in the near-field situation. We develop a steering beam gain calculation method and design the lower-layer codebook to satisfy the coverage of the Fresnel region. For the upper-layer codebook, we propose beam rotation and beam relocation methods to place an arbitrary beam pattern at target locations. The simulation results show the superiority of the proposed near-field hierarchical codebook design.
