热点论文带您领略未来通信在新材料技术领域的最新进展——图书馆前沿文献专题推荐服务（48）

2021-10-22

 

        在上一期前沿文献中推荐中，介绍了光电材料及信息编码领域的最新进展，包括：具有超快控制的可重编程等离子体拓扑绝缘体、用于下一代数据通信的新兴发光二极管、通过时域数字编码超表面对谐波振幅和相位进行精确和宽带操作-以达到256QAM毫米波无线通信，以及基于区块链的无线通信：迈向6G的新范式。
在本期的文献推荐中，关注点着眼于通信新材料及相关技术领域的最新进展，包括：用于5G和6G的氧化物电子器件，一种基于大面积电子器件的工作频率位千兆赫的相控阵，5G基础设施的治理:介于路径依赖和基于风险的方法之间，以及基于可编程元曲面的5G移动通信波束控制。供相关领域的科研人员参考。
 
领域一 用于5G和6G的氧化物电子器件
Oxide electronics for 5G and 6G
George A. Kyriacou
Nature Electronics, 2021
Large-area electronics based on metal-oxide thin-film transistors can be used to create integrated phased arrays for radiofrequency front-ends in 5G — and future 6G — communication systems.
 
领域二 一种基于大面积电子器件的工作频率位千兆赫的相控阵
A phased array based on large-area electronics that operates at gigahertz frequency
Can Wu, etc.
Nature Electronics, 2021
Large-aperture electromagnetic phased arrays can provide directionally controlled radiation signals for use in applications such as communications, imaging and power delivery. However, their deployment is challenging due to the lack of an electronic technology capable of spanning large physical dimensions. Furthermore, applications in areas such as aviation, the Internet of Things and healthcare require conformal devices that can operate on shaped surfaces. Large-area electronics technology could be used to create low-cost, large-scale, flexible electromagnetic phased arrays, but it employs low-temperature processing that limits device- and system-level performance at high frequencies. Here we show that inductor–capacitor oscillators operating at gigahertz frequencies can be created from large-area electronics based on high-speed, self-aligned zinc-oxide thin-film transistors. The oscillator circuits incorporate frequency locking and phase tuning, which are required for electromagnetic phased arrays. We integrate our phase-tunable oscillators in a 0.3-m-wide aperture, creating a phased array system that operates at ~1 GHz and is capable of beamforming.
 
领域三 5G基础设施的治理:介于路径依赖和基于风险的方法之间
The governance of 5G infrastructure: between path dependency and risk-based approaches
Roxana Radu, etc.
Journal of Cybersecurity, 2021
The fifth generation (5G) wireless technology promises a powerful, reliable and fast infrastructure to match artificial intelligence and Internet of Things developments. But its rollout has stirred strong political tensions around the prominent role that Chinese providers might be allowed to play in building the new networks. Between 2018 and 2020, a few countries have banned—partially or totally—the use of networking equipment produced by Huawei and ZTE, while others have mandated technical and security reviews to mitigate the risks associated with Chinese-origin components in the national 5G infrastructure. This article provides a thematic analysis of the security arguments and policy options emerging in the early days of the 5G debates. Based on key high-level statements, parliamentary debates and legislative acts published from mid-2018 to 2020, we examine perceived risks and threats surfacing in the public discourse, as well as the main regulatory directions emerging in seven countries. Our analysis shows policy alignment across multilateral commitments such as the European Union (EU) or the Five Eyes intelligence alliance. While selected EU member states lean towards risk-based governance and adaptive policies, Five Eyes nations opt for pre-emptive bans of 5G Chinese vendors, revealing path-dependent strategies for the sector. We conclude by discussing the policy reversal experienced by the UK in 2020 and the consolidation of new governance approaches for 5G infrastructure.
 
领域四 基于可编程元曲面的5G移动通信波束控制
Beamsteering for 5G Mobile Communication Using Programmable Metasurface
Li, Yueheng, etc.
IEEE WIRELESS COMMUNICATIONS LETTERS, 2021, 10(7)
The usage of programmable metasurfaces (PMs) offers a promising way to realize flexible and fully electronic beam steering. Compared to phased arrays, PMs are particularly attractive due to their potential as a cost-effective base station in wireless communication systems, effectively reducing power consumption and total system costs. Although PM has been a hot topic, development of its real-time implementations are rarely touched. In this letter, an experimental mobile communication system with user tracking based on PM beamforming at 28 GHz is proposed and implemented. Thereby, beam management algorithms comparable to the 3GPP 5G NR standards are used. Experiments show that the system performs precise tracking with an angle mismatch from 0.5 degrees to 2.5 degrees, and minimizes the beam training overhead through flexible beam refinement. Experiments also show that the tracking of a mobile user with a maximum angular speed of 37.5 degrees/s can be realized in the established system.

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