Low-complexity beam-domain channel estimation and power allocation in hybrid architecture massive MIMO systems

Low-complexity beam-domain channel estimation and power allocation in hybrid architecture massive MIMO systems
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混合架构大规模 MIMO 系统中的低复杂度波束域信道估计和功率分配

DOI:
10.1186/s13638-019-1546-6
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发表时间:
2019-11
影响因子:
2.6
通讯作者:
Dang Jian
Dang Jian
中科院分区:
计算机科学4区
文献类型:
--
作者:
Chen Xiao;Zhang Zaichen;Wu Liang;Dang Jian

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在这本杂志中,我们研究了混合架构的大规模多输入多输出(MIMO)通信系统中的波束域信道估计和功率分配。首先,我们提出了一种低复杂度的信道估计方法,该方法利用从到达方向(DOA)估计和低开销的导频估计的波束增益获得的波束导向矢量。基于估计的波束信息,还设计了一种纯模拟预编码策略。然后,多个波束之间的最佳功率分配推导出最大化的频谱效率。最后,仿真结果表明,所提出的方案可以获得较高的信道估计精度和频谱效率。
In this journal, we investigate the beam-domain channel estimation and power allocation in hybrid architecture massive multiple-input and multiple-output (MIMO) communication systems. First, we propose a low-complexity channel estimation method, which utilizes the beam steering vectors achieved from the direction-of-arrival (DOA) estimation and beam gains estimated by low-overhead pilots. Based on the estimated beam information, a purely analog precoding strategy is also designed. Then, the optimal power allocation among multiple beams is derived to maximize spectral efficiency. Finally, simulation results show that the proposed schemes can achieve high channel estimation accuracy and spectral efficiency.
DOI: 10.1109/glocom.2009.5425970
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