High-Resolution Programmable Scattering for Wireless Coverage Enhancement: An Indoor Field Trial Campaign
High-Resolution Programmable Scattering for Wireless Coverage Enhancement: An Indoor Field Trial Campaign
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DOI：
10.1109/tap.2022.3216555
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发表时间：
2021-12
影响因子：
5.7
通讯作者：
James Rains;Jalil ur Rehman Kazim;Anvar Tukmanov;T. Cui;Lei Zhang;Q. Abbasi;M. Imran
中科院分区：
文献类型：
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作者：
James Rains;Jalil ur Rehman Kazim;Anvar Tukmanov;T. Cui;Lei Zhang;Q. Abbasi;M. Imran
本文提出了一种多位可重构智能表面(RIS)，它具有高的相位分辨率，能够在6 GHz以下的方位面上进行波束控制。在实际的室内部署中进行了现场试验，确定了三种常见无线通信场景的覆盖增强性能。即，在具有混合视线(LOS)和非在线视线(NLOS)条件的开放大厅中服务用户，通过长走廊之间的交叉点进行通信，以及通过窗户传播的多层场景。这项工作探索了RIS部署以缓解室内无线通信中的NLOS影响的潜力。在单发送器(Tx)、单接收器(Rx)NLOS链路中，通过适当放置RIS，可以实现高达40分贝的接收功率改进，并且在3-4.5 GHz范围内可能获得至少100 MHz的瞬时带宽。此外，还通过实验验证了相位分辨率对多比特RIS的最优功率接收的影响，与1比特的情况相比，提高了2.65分贝。
This article presents a multibit reconfigurable intelligent surface (RIS) with a high phase resolution, capable of beam-steering in the azimuthal plane at sub-6 GHz. Field trials in realistic indoor deployments have been carried out, with coverage enhancement performance ascertained for three common wireless communication scenarios. Namely, serving users in an open lobby with mixed line-of-sight (LoS) and nonline-of-sight (NLoS) conditions, communication via a junction between long corridors, and a multifloor scenario with propagation via windows. This work explores the potential for RIS deployment to mitigate NLoS effects in indoor wireless communications. In a single transmitter (Tx), single receiver (Rx) NLoS link, received power improvement of as much as 40 dB is shown to be achievable by suitable placement of an RIS, with an instantaneous bandwidth of at least 100 MHz possible over a 3–4.5 GHz range. In addition, the effects of phase resolution on the optimal power reception for the multibit RIS have been experimentally verified, with a 2.65 dB improvement compared with a 1 bit case.