Robust beam management scheme based on simple 2-D DOA estimation
Robust beam management scheme based on simple 2-D DOA estimation
复制标题
DOI：
10.1109/wcsp.2017.8170981
复制
发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
Xiao Chen;Zaichen Zhang;Liang Wu;J. Dang;Pen-Shun Lu;Chen Sun
中科院分区：
文献类型：
--
作者：
Xiao Chen;Zaichen Zhang;Liang Wu;J. Dang;Pen-Shun Lu;Chen Sun
本文研究了一种混合波束形成结构的毫米波多输入多输出（MIMO）通信系统。在初始接入和波束切换的情况下，为了搜索最优波束对，波束扫描算法复杂且耗时。为了提高系统的鲁棒性，我们提出了一种新的波束管理方案，可以快速确定最优波束并切换到次优波束。为了实现波束管理方案，我们设计了一个简单的二维（2-D）到达方向（DOA）估计策略，使用混合阵列中的有限射频链。数值结果表明，该方案与采用优化设计的MIMO系统具有相同的可达率。此外，所提出的波束管理方案大大降低了波束选择的时间成本。
In this paper, we consider a millimeter wave (mmWave) multiple-input multiple-output (MIMO) communication system with hybrid beamforming architecture. To search the optimal beam pair, the beam sweeping algorithm is complex and time-consuming in the case of initial access and beam switching. With the aim of improving the robustness, we propose a novel beam management scheme to quickly determine the optimal beam and switch to the suboptimal beam. To implement the beam management scheme, we design a simple 2-dimensional (2-D) direction-of-arrival (DOA) estimation strategy using limited radio frequency (RF) chains in the hybrid array. Numerical results show that the proposed scheme can obtain an excellent achievable rate which is the same as that of the MIMO system employed optimal design. Further, the proposed beam management scheme greatly reduces the time cost of the beam selection.