@inproceedings{bb869f165c544fe9a34720fa9fdc99cb,
title = "Single shot single antenna path discovery in THz networks",
abstract = "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.",
keywords = "beam steering, leaky wave antenna, path discovery, terahertz",
author = "Yasaman Ghasempour and Yeh, {Chia Yi} and Rabi Shrestha and Daniel Mittleman and Edward Knightly",
note = "Funding Information: In this paper, we present OPERA, a novel single-shot single-antenna system that enables the discovery of dominant LOS and NLOS paths in THz channels. OPERA embeds path direction information into the inherent characteristics of the signal traveling along that path. In particular, we create a THz Rainbow by exciting a single leaky wave antenna with a THz pulse and simultaneously transmit signals whose spectral signatures are a function of emission angle. We model such angular-dependent signatures in order to enable the receiver to extract path directions from the received power spectrum. Our experiments show that OPERA achieves direction estimates within 2◦ of ground truth on average while incurring only tens of nano second overhead. 8 ACKNOWLEDGMENTS We appreciate the valuable comments and feedback from the anonymous reviewers. This research was supported by Intel, and by NSF grants CNS-1642929, CNS-1514285, CNS-1629929, and CNS-1553447. Publisher Copyright: {\textcopyright} 2020 ACM.; 26th Annual International Conference on Mobile Computing and Networking, MobiCom 2020 ; Conference date: 21-09-2020 Through 25-09-2020",
year = "2020",
month = apr,
day = "16",
doi = "10.1145/3372224.3380895",
language = "English (US)",
series = "Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM",
publisher = "Association for Computing Machinery",
pages = "228--240",
booktitle = "Proceedings of the 26th Annual International Conference on Mobile Computing and Networking, MobiCom 2020",
}