University of Oulu

P. Kyösti, M. F. De Guzman, K. Haneda, N. Tervo and A. Pärssinen, "How Many Beams Does Sub-THz Channel Support?," in IEEE Antennas and Wireless Propagation Letters, vol. 21, no. 1, pp. 74-78, Jan. 2022, doi: 10.1109/LAWP.2021.3118464

How many beams does sub-THz channel support

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Author: Pekka Kyösti, Pekka1; De Guzman, Mar Francis2; Haneda, Katsuyuki3;
Organizations: 1CWC, University of Oulu Faculty of Information Technology and Electrical Engineering, 549955 Oulu, Pohjois-Pohjanmaa, Finland
2Department of Electronics and Nanoengineering, School of Electrical Engineering, Aalto University, 174277 Espoo, Finland
3Department of Electronics and Nanoengineering, Aalto University School of Electrical Engineering, 126176 Espoo, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.8 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2021-12-20


Antenna, radio frequency (RF) circuit, algorithm, and system researchers on sub-THz RF are interested in knowing characteristics of corresponding radio channels. Among other things, a relevant question is the number of beams supported by the channel. From wideband directional propagation measurements one can estimate how many significant paths are present in a measurement location, but interpreting that to separable beams is not trivial. In this letter, we introduce three methods to approximate the number of beams that a measured power angular delay profile can support. We show also example evaluations and distribution functions of beam numbers, estimated from indoor D-band measurement data.

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Series: IEEE antennas and wireless propagation letters
ISSN: 1536-1225
ISSN-E: 1548-5757
ISSN-L: 1536-1225
Volume: 21
Issue: 1
Pages: 74 - 78
DOI: 10.1109/LAWP.2021.3118464
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work has been partly funded by the European Commission through the H2020 project Hexa-X (Grant Agreement no. 101015956) and partly by 6G Flagship programme, funded by Academy of Finland (grant no. 318927).
EU Grant Number: (EU) Hexa-X - 6G vision and intelligent fabric of technology enablers connecting human, physical, and digital worlds
Copyright information: This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see