Single shot single antenna path discovery in THz networks
Single shot single antenna path discovery in THz networks
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DOI：
10.1145/3372224.3380895
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
Yasaman Ghasempour;Chia-Yi Yeh;R. Shrestha;D. Mittleman;E. Knightly
中科院分区：
文献类型：
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作者：
Yasaman Ghasempour;Chia-Yi Yeh;R. Shrestha;D. Mittleman;E. Knightly
由于宽太赫兹尺度光谱带的可用性，太赫兹通信有可能实现数据速率提高一个数量级。不幸的是，在太赫兹网络中建立和管理高度定向波束具有挑战性，因为链路缺乏较低频段的“伪全向”接收能力，并且由于波束只有几度的窄波束，AP-客户端波束分辨率的乘积很高。在本文中，我们提出了使用 THz RAinbow (OPERA) 的一次性路径发现，这是一种新颖的系统，可以识别 AP 和所有客户端之间的主要路径，以便有效地引导定向波束。关键思想是将路径方向嵌入到沿每条路径传播的信号的固有特征中。为此，我们利用单个漏波天线并创建了太赫兹彩虹。太赫兹彩虹传输由在角域上具有独特光谱特性的不同信号组成。利用太赫兹彩虹中的空间频谱特征，所有接收器都可以将测量到的信号与已知的传输特征相关联，从而一次性发现发送器的路径方向。我们的实验表明，OPERA 可以实现 LOS 和反射路径的平均方向估计，误差在地面实况 2° 以内。
THz communication has the potential to realize an order of magnitude increase in data rates due to the availability of wide THz-scale spectral bands. Unfortunately, establishing and managing highly directional beams in THz networks is challenging as links lack the "pseudo-omni" reception capability of lower bands and the product of AP-client beam resolution is high due to narrow beams of only a few degrees. In this paper, we present One-shot Path discovEry with a THz RAinbow (OPERA), a novel system that identifies dominant paths between the AP and all clients in order to efficiently steer directional beams. The key idea is to embed path direction into the inherent characteristics of signals traveling along each path. To do so, we exploit a single leaky wave antenna and create a THz Rainbow. A THz Rainbow transmission consists of distinct signals with unique spectral characteristics across the angular domain. Leveraging the spatial-spectral signatures in the THz Rainbow, all receivers can correlate the measured signal with the known transmission signatures to discover the sender's path directions in one-shot. Our experiments demonstrate that OPERA achieves average direction estimates within 2° of ground truth for LOS and reflected paths.