Out-of-Band Information Aided mmWave/THz Beam Search: A Spatial Channel Similarity Perspective
Zhang, Peize; Kyösti, Pekka; Haneda, Katsuyuki; Koivumaki, Pasi; Lyu, Yejian; Fan, Wei (2022-11-15)
Zhang, Peize
Kyösti, Pekka
Haneda, Katsuyuki
Koivumaki, Pasi
Lyu, Yejian
Fan, Wei
IEEE
15.11.2022
P. Zhang, P. Kyösti, K. Haneda, P. Koivumäki, Y. Lyu and W. Fan, "Out-of-Band Information Aided mmWave/THz Beam Search: A Spatial Channel Similarity Perspective," in IEEE Communications Magazine, vol. 62, no. 2, pp. 86-92, February 2024, doi: 10.1109/MCOM.001.2200398.
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© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2022121972502
https://urn.fi/URN:NBN:fi-fe2022121972502
Tiivistelmä
Abstract
The transition to higher frequency bands, such as millimeter-wave (mmWave) and terahertz (THz), will be capitalized in the long term for future wireless communications. One of the challenges relates to rapid establishment of mmWave/THz links with low beam training overhead due to highly directional transmission. A promising solution is to take advantage of the coexistence of sub-6 GHz, mmWave, and THz wireless networks and to use out-of-band spatial information for enabling fast beam search. Success depends on the spatial similarity of radio channels across different frequency bands. In this article, we promote a feasibility study of low-frequency spatial channel information assisted high-frequency beam search from a radio channel point of view. We develop a multi-band channel similarity measure of desired beam directions extracted from radio channels, which is obtained via filtering propagation paths by different beam patterns at different frequencies. Measurement-and ray-tracing-based evaluations across multiple frequencies and environments are performed, which prove the usability of out-of-band information aided beam search strategy in a line-of-sight (LoS)-dominated scenario and even in a non-LoS scenario. Finally, we discuss the challenges associated with exploiting spatial channel similarity.
The transition to higher frequency bands, such as millimeter-wave (mmWave) and terahertz (THz), will be capitalized in the long term for future wireless communications. One of the challenges relates to rapid establishment of mmWave/THz links with low beam training overhead due to highly directional transmission. A promising solution is to take advantage of the coexistence of sub-6 GHz, mmWave, and THz wireless networks and to use out-of-band spatial information for enabling fast beam search. Success depends on the spatial similarity of radio channels across different frequency bands. In this article, we promote a feasibility study of low-frequency spatial channel information assisted high-frequency beam search from a radio channel point of view. We develop a multi-band channel similarity measure of desired beam directions extracted from radio channels, which is obtained via filtering propagation paths by different beam patterns at different frequencies. Measurement-and ray-tracing-based evaluations across multiple frequencies and environments are performed, which prove the usability of out-of-band information aided beam search strategy in a line-of-sight (LoS)-dominated scenario and even in a non-LoS scenario. Finally, we discuss the challenges associated with exploiting spatial channel similarity.
Kokoelmat
- Avoin saatavuus [31995]