Reconfigurable ULAs for Line-of-Sight MIMO Transmission
Reconfigurable ULAs for Line-of-Sight MIMO Transmission
复制标题
用于视距 MIMO 传输的可重新配置 ULA
DOI：
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发表时间：
2020
影响因子：
10.4
通讯作者：
A. Lozano
中科院分区：
文献类型：
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作者：
Heedong Do;N. Lee;A. Lozano
本文建立了所有可能的天线布置上的视距多天线通道容量的上限，并表明，具有与 SNR 相关的发射机和/或接收机旋转的均匀线性阵列 (ULA) 可以非常接近这种容量，并且实际上可以在低和高 SNR 下以及在天线数量上渐进地实现这一容量。然后，作为机械旋转 ULA 的替代方案，我们建议在发射器或接收器处具有径向布置的多个 ULA 中进行电子选择，并且我们将容量的不足限制为此类 ULA 数量的函数。只需三个 ULA，角度适当，即可实现 96% 的容量。最后，我们进一步介绍了复杂性降低的预编码器和线性接收器，它们利用了这些可配置 ULA 架构产生的通道结构。
This paper establishes an upper bound on the capacity of line-of-sight multiantenna channels over all possible antenna arrangements and shows that uniform linear arrays (ULAs) with an SNR-dependent rotation of transmitter and/or receiver can closely approach such capacity—and in fact achieve it at low and high SNR, and asymptotically in the numbers of antennas. Then, as an alternative to mechanically rotating ULAs, we propose to electronically select among multiple ULAs having a radial disposition at either transmitter or receiver, and we bound the shortfall from capacity as a function of the number of such ULAs. With only three ULAs, properly angled, 96% of the capacity can be achieved. Finally, we further introduce reduced-complexity precoders and linear receivers that capitalize on the structure of the channels spawned by these configurable ULA architectures.