Journal
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
Volume 3, Issue -, Pages 663-686Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/OJAP.2022.3181326
Keywords
Atmospheric measurements; Antenna measurements; Gain; Wireless communication; Dispersion; Loss measurement; Device-to-device communication; THz communications; channel sounding; path loss; delay dispersion; horn antenna; equalizer; propagation channel; channel modeling
Funding
- Semiconductor Research Corporation under the JUMP Program
- National Science Foundation
- National Institute of Standards and Technology
- Samsung Research America
- Foreign Fulbright Ecuador SENESCYT Program
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This paper investigates the channel characteristics at 145 GHz in various environments and provides the channel parameters for the design and evaluation of THz communications systems.
Design and assessment of THz communications systems, which will form an essential part of 6G, require an understanding of the propagation channels the systems will operate in. This paper presents investigations of the channel characteristics in various scenarios at 145 GHz, which is the band currently envisioned for the first round of deployments. In particular, we review several extensive measurement campaigns performed by the University of Southern California in both outdoor and indoor environments. We present the measurement and evaluation methodology and sample results that illustrate the dominant propagation effects in different environments. We then summarize the parameters of the statistical channel models for path loss, delay dispersion, and angular dispersion. Based on these results, we find that even in NLoS (non-line-of-sight) situations, Gbit/s communications can be sustained over a 100 m distance; that (for an antenna gain of 20 dB), there is considerable delay dispersion, requiring tens of equalizer taps, and that angular dispersion is significant in both LoS and NLoS situations. The channel parameters can be thus used as a basis for system design and evaluation under realistic operating conditions.
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