毫米波大规模MIMO系统中高效分层波束搜索算法  

Efficient Hierarchical Beam Search Algorithm in Millimeter Wave Massive MIMO System

作　　者：杜雪 司付平 朱鹏程[1] DU Xue;SI Fuping;ZHU Pengcheng(School of Information Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《移动通信》2024年第10期106-113,共8页Mobile Communications

基　　金：国家自然科学基金面上项目“毫米波分布式大规模MIMO通信关键技术研究”(62171126)。

摘　　要：波束成形技术是克服毫米波与太赫兹频段的高路径传播损耗的关键技术之一。为实现波束成形,3GPP提出一系列波束管理程序,用于确定和维护一组收发波束。其中,降低收发波束确定算法的错误概率和搜索时间对于提高系统性能至关重要。为此,联合使用天线子阵列和天线失活技术,设计一种适用于任何天线数的灵活结构分层码本,并基于该码本提出了两阶段搜索算法。仿真结果证实了所提出的分层搜索方案在搜索时间和搜索准确性上的优越性。Beamforming technology is one of the key techniques to overcome the high path propagation losses in millimeter-wave and terahertz bands.To implement beamforming,3GPP proposes a series of beam management procedures for determining and maintaining a set of transmit and receive beams.Reducing the error probability and search time of the beam determination algorithm is crucial for improving system performance.To this end,we jointly utilize antenna sub-arrays and antenna deactivation techniques to design a flexible hierarchical codebook structure applicable to any number of antennas,and propose a two-stage search algorithm based on this codebook.Simulation results confirm the superiority of the proposed hierarchical search scheme in terms of search time and accuracy.

关 键 词：毫米波通信 波束搜索 波束对齐 波束细化 码本设计 

分 类 号：TN928[电子电信—通信与信息系统]