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arXiv 2201.01386cs.ITcs.LGcs.SIeess.SPmath.IT
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用于使用NLOS信道的基于位置的波束成形的深度学习

Deep learning for location based beamforming with NLOS channels

b<>com(b<>com 研究院);Univ Rennes(雷恩大学);INSA Rennes(雷恩国立应用科学学院);IETR - UMR 6164(电子与电信研究所 - UMR 6164)

Luc Le Magoarou, Taha Yassine, Stéphane Paquelet, Matthieu Crussière

摘要:

大规模MIMO系统是高效的,但严重依赖于基站处的准确信道状态信息(CSI),以便确定适当的预编码器。CSI捕获需要发送导频符号,这会导致重要的开销。在本文中,提出了一种方法,其目标是确定一个适当的预编码器的知识,用户的位置。这种确定预编码器的方式被称为基于位置的波束成形。它允许减少或甚至消除对导频符号的需要,这取决于如何获得位置。所提出的方法以监督的方式学习从位置到预编码器的直接映射。它涉及具有基于随机傅立叶特征的特定结构的神经网络,允许学习包含高空间频率的函数。它是经验评估和现实的合成通道产生有前途的结果。与以前提出的方法相反,它允许处理视线(LOS)和非视线(NLOS)信道。

英文摘要:

Massive MIMO systems are highly efficient but critically rely on accurate channel state information (CSI) at the base station in order to determine appropriate precoders. CSI acquisition requires sending pilot symbols which induce an important overhead. In this paper, a method whose objective is to determine an appropriate precoder from the knowledge of the user's location only is proposed. Such a way to determine precoders is known as location based beamforming. It allows to reduce or even eliminate the need for pilot symbols, depending on how the location is obtained. the proposed method learns a direct mapping from location to precoder in a supervised way. It involves a neural network with a specific structure based on random Fourier features allowing to learn functions containing high spatial frequencies. It is assessed empirically and yields promising results on realistic synthetic channels. As opposed to previously proposed methods, it allows to handle both line-of-sight (LOS) and non-line-of-sight (NLOS) channels.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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