面向具有空间相关信道的HAPS的MIMO-NOMA使能扇形圆柱大规模天线阵列
MIMO-NOMA Enabled Sectorized Cylindrical Massive Antenna Array for HAPS with Spatially Correlated Channels
AI总结：
本文针对HAPS中用户间及天线阵元间的空间相关性问题，提出一种MIMO-NOMA使能的扇形圆柱大规模天线阵列架构，并设计功率分配算法以在满足QoS和SIC条件下最大化频谱效率与能量效率。
摘要：
高空平台站（HAPS）技术作为通信网络中充当基站的可行技术，正引起广泛关注。然而，HAPS面临相邻用户信道增益之间高空间相关性的挑战，这是由于HAPS与地面用户之间存在主导的视距（LoS）路径。此外，HAPS天线阵元之间存在空间相关性，其取决于传播环境和天线阵列阵元之间的距离。本文提出了一种用于HAPS的天线架构，并通过刻画HAPS的信道增益和空间相关矩阵来考虑上述问题。我们提出了一种用于HAPS的圆柱形天线，该天线利用垂直均匀线性阵列（ULA）扇区。此外，为解决用户之间高空间相关性的问题，提出了非正交多址接入（NOMA）分簇方法。还开发了一种算法在用户之间分配功率，以在满足服务质量（QoS）和串行干扰消除（SIC）条件的同时最大化频谱效率和能量效率。最后，仿真结果表明，在多天线HAPS系统中，空间相关性对频谱效率和能量效率有显著影响。
英文摘要：
The high altitude platform station (HAPS) technology is garnering significant interest as a viable technology for serving as base stations in communication networks. However, HAPS faces the challenge of high spatial correlation among adjacent users' channel gains which is due to the dominant line-of-sight (LoS) path between HAPS and terrestrial users. Furthermore, there is a spatial correlation among antenna elements of HAPS that depends on the propagation environment and the distance between elements of the antenna array. This paper presents an antenna architecture for HAPS and considers the mentioned issues by characterizing the channel gain and the spatial correlation matrix of the HAPS. We propose a cylindrical antenna for HAPS that utilizes vertical uniform linear array (ULA) sectors. Moreover, to address the issue of high spatial correlation among users, the non-orthogonal multiple access (NOMA) clustering method is proposed. An algorithm is also developed to allocate power among users to maximize both spectral efficiency and energy efficiency while meeting quality of service (QoS) and successive interference cancellation (SIC) conditions. Finally, simulation results indicate that the spatial correlation has a significant impact on spectral efficiency and energy efficiency in multiple antenna HAPS systems.
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