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arXiv 2409.03386cs.ITeess.SPmath.IT
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可移动天线：信道测量、建模与性能评估

Movable Antennas: Channel Measurement, Modeling, and Performance Evaluation

Yiqin Wang, Heyin Shen, Chong Han, Meixia Tao

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12 pages, 31 figures
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AI总结：

本文通过300 GHz信道测量与建模，提出空间相关信道模型和SINR最大化位置选择算法，证明可移动天线相比固定天线能提升10%频谱效率。

摘要：

几十年来，多天线已成为无线通信系统演进中的一项关键使能技术。与包含固定位置天线的传统多天线系统不同，位置灵活的天线系统被提出以充分利用无线信道的空间变化。本文从信道测量、建模、位置优化到性能评估对可移动天线（MA）系统进行了分析。首先，开发了一个带有物理可移动天线的宽带信道测量系统，其极高的可移动分辨率达到0.02 mm。基于该信道测量，针对300 GHz下32×32平面端口位置的二维可移动天线系统，构建了一个实用的两径模型。根据测量结果，提出了二维可移动天线系统的空间相关信道模型，该模型通过实测信道的协方差矩阵进行统计参数化。最后，提出了信干噪比（SINR）最大化的位置选择算法，该算法达到了最优性能的99%。针对平面和线性可移动天线系统，评估并比较了不同可移动天线系统在频谱效率方面的性能。大量结果表明，在应对多径衰落方面，可移动天线优于固定位置天线，并在300 GHz实测信道中将频谱效率提高了10%。

英文摘要：

Since decades ago, multi-antenna has become a key enabling technology in the evolution of wireless communication systems. In contrast to conventional multi-antenna systems that contain antennas at fixed positions, position-flexible antenna systems have been proposed to fully utilize the spatial variation of wireless channels. In this paper, movable antenna (MA) systems are analyzed from channel measurement, modeling, position optimization to performance evaluation. First, a broadband channel measurement system with physical MAs is developed, for which the extremely high movable resolution reaches 0.02 mm. A practical two-ray model is constructed based on the channel measurement for a two-dimensional movable antenna system across 32$\times$32 planar port positions at 300 GHz. In light of the measurement results, spatial-correlated channel models for the two-dimensional MA system are proposed, which are statistically parameterized by the covariance matrix of measured channels. Finally, the signal-to-interference-and-noise ratio (SINR)-maximized position selection algorithm is proposed, which achieves 99% of the optimal performance. The performance of different MA systems in terms of spectral efficiency are evaluated and compared for both planar and linear MA systems. Extensive results demonstrate the advantage of MAs over fixed-position antennas in coping with the multi-path fading and improving the spectral efficiency by 10% in a 300 GHz measured channel.

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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