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配备旋转均匀线性阵列的室内无线网络频谱效率研究

On the Spectral Efficiency of Indoor Wireless Networks with a Rotary Uniform Linear Array

Eduardo Noboro Tominaga, Onel Luis Alcaraz López, Tommy Svensson, Richard Demo Souza, Hirley Alves

AI总结:

本文提出为配备均匀线性阵列的接入点引入旋转能力,以低成本和低复杂度替代传统可移动天线,通过基于设备位置估计计算最优旋转角度最大化每用户频谱效率,在强视距信道场景下显著提升性能且对定位误差具有鲁棒性。

摘要:

现代无线通信系统依赖于多用户多输入多输出(MU-MIMO)技术。在此类系统中,每个接入点(AP)配备多个天线元件,并同时服务多个设备。值得注意的是,传统系统采用固定天线,即不具备任何移动能力的天线,而可移动天线的概念近期在研究界获得了广泛关注。通过在受限区域内移动,可移动天线能够利用连续域内的无线信道变化。这种额外的自由度可以提升无线链路的质量,从而改善通信性能。然而,文献中提出的用于MU-MIMO的可移动天线结构复杂、体积庞大、成本高昂且功耗较高。在本文中,我们提出了一种复杂度和成本更低的替代系统。具体而言,我们建议为配备天线均匀线性阵列(ULA)的AP引入旋转能力。我们考虑一个室内场景的上行链路,其中AP同时服务多个设备。ULA的最优旋转角度基于对活动设备位置的估计进行计算,旨在最大化每用户平均可达频谱效率(SE)。采用空间相关Rician信道模型,我们的数值结果表明,在信道向量的视距分量较强的场景中,AP的旋转能力可以带来SE的显著提升。此外,我们提出的系统对不完美的定位估计具有鲁棒性。

英文摘要:

Contemporary wireless communication systems rely on Multi-User Multiple-Input Multiple-Output (MU-MIMO) techniques. In such systems, each Access Point (AP) is equipped with multiple antenna elements and serves multiple devices simultaneously. Notably, traditional systems utilize fixed antennas, i.e., antennas without any movement capabilities, while the idea of movable antennas has recently gained traction among the research community. By moving in a confined region, movable antennas are able to exploit the wireless channel variation in the continuous domain. This additional degree of freedom may enhance the quality of the wireless links, and consequently the communication performance. However, movable antennas for MU-MIMO proposed in the literature are complex, bulky, expensive and present a high power consumption. In this paper, we propose an alternative to such systems that has lower complexity and lower cost. More specifically, we propose the incorporation of rotation capabilities to APs equipped with Uniform Linear Arrays (ULAs) of antennas. We consider the uplink of an indoor scenario where the AP serves multiple devices simultaneously. The optimal rotation of the ULA is computed based on estimates of the positions of the active devices and aiming at maximizing the per-user mean achievable Spectral Efficiency (SE). Adopting a spatially correlated Rician channel model, our numerical results show that the rotation capabilities of the AP can bring substantial improvements in the SE in scenarios where the line-of-sight component of the channel vectors is strong. Moreover, our proposed system is robust against imperfect positioning estimates.

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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