Multi-user terahertz WLANs with angularly dispersive links
Multi-user terahertz WLANs with angularly dispersive links
复制标题
具有角色散链路的多用户太赫兹 WLAN
DOI：
10.1145/3492866.3549725
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Knightly, Edward W.
中科院分区：
文献类型：
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作者：
Dasala, Keerthi Priya;Knightly, Edward W.
太赫兹通信可以实现数据速率和用户密度的下一个数量级，因为有了宽太赫兹尺度的频段。宽带链路可以表现出角色散，即依赖于频率的辐射方向。虽然角度色散通过频率调谐实现了路径发现和动态波束控制，但THz链路中的多用户通信仍然是一个尚未解决的挑战。本文首次对具有角度色散链路的多用户太赫兹无线局域网进行了研究和性能评估。我们采用单片平行板漏波天线(LWA)进行太赫兹定向传输，提出了一种多用户通信策略，该策略利用用户的角色散和角间隔，以聚合速率最大化为目标，为位于不同方向的用户提供全频谱接入。通过分析模型驱动的评估和空中实验，我们展示了角度分散的LWA链路的多用户性能如何通过非线性机制从根本上取决于用户使用的频率、角度和带宽。随着带宽的增加在LWA链路中产生更大的信号足迹，我们证明了与模型预测相比，不仅随着波束宽度的增加，聚合数据速率最大化，而且实验链路甚至对于具有旁瓣和不对称的实际不规则波束也要好得多。我们的实验表明，通过利用角色散和用户的角分离，我们可以在没有竞争或媒体访问控制的情况下传输多达11个并发用户。
THz communication can realize the next order of magnitude in data rate and user densities due to the availability of wide THz-scale spectral bands. Wide bandwidth links can exhibit angular dispersion, i.e., frequency-dependent radiation direction. While angular dispersion has enabled path discovery and dynamic beam steering via frequency tuning, multi-user communication in THz links remains an unaddressed challenge. This paper presents the first study and performance evaluation of multi-user THz WLANs with angularly dispersive links. We employ a single parallel-plate Leaky-Wave Antenna (LWA) for THz directional transmission and present a multi-user communication strategy that exploits angular dispersion and angular separation of users and provides all-spectrum access to users located in different directions with the objective of aggregate rate maximization. With analytical model-driven evaluations and over-the-air experiments, we show how the multi-user performance of an angularly dispersive LWA link fundamentally depends on frequency, angle, and bandwidth utilized by users, through non-linear mechanisms. As increasing bandwidth yields a larger signal footprint in LWA links, we demonstrate that as compared to the model prediction, not only is aggregate data rate maximized with wider beams, but that the experimental link is far better even for practical irregular beams with side lobes and asymmetry. Our experiments demonstrate that by exploiting angular dispersion and users' angular separation, we can transmit without contention or medium access control up to 11 simultaneous users.
DOI：
10.1109/infocom41043.2020.9155441
发表时间：
2020-07
期刊：
IEEE INFOCOM 2020 - IEEE Conference on Computer Communications
影响因子：
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作者：
Keerthi Priya Dasala;J. Jornet;E. Knightly
通讯作者：
Keerthi Priya Dasala;J. Jornet;E. Knightly
DOI：
10.1109/infocom42981.2021.9488826
发表时间：
2021-05
期刊：
IEEE INFOCOM 2021 - IEEE Conference on Computer Communications
影响因子：
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作者：
Keerthi Priya Dasala;J. Jornet;E. Knightly
通讯作者：
Keerthi Priya Dasala;J. Jornet;E. Knightly
DOI：
10.1145/3372224.3380895
发表时间：
2020-04
期刊：
Proceedings of the 26th Annual International Conference on Mobile Computing and Networking
影响因子：
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作者：
Yasaman Ghasempour;Chia-Yi Yeh;R. Shrestha;D. Mittleman;E. Knightly
通讯作者：
Yasaman Ghasempour;Chia-Yi Yeh;R. Shrestha;D. Mittleman;E. Knightly