Sub-THz Communications: Perspective and Results from the Hexa-X-II Project
Artikel i vetenskaplig tidskrift, 2025
Sub-THz communications are envisioned to unlock ultra-high data rates, ultra-low latencies, and massive connectivity in future wireless systems by utilizing bandwidths of up to tens of GHz. This paper presents the holistic perspective on sub-THz communications developed within the European sixthgeneration (6G) flagship project Hexa-X-II. According to this perspective, successfully deploying sub-THz systems will require addressing several physical-layer (PHY) challenges associated with the harsh signal propagation and hardware limitations. In addition, sub-THz systems will drive advancements in essential wireless applications beyond communications, such as joint communications and sensing (JCAS). In this context, we present a collection of technical contributions and key findings from the Hexa-X-II project that have shaped this perspective. In contrast to existing works, these efforts collectively tackle the fundamental PHY challenges of sub-THz communications, i.e., understanding and modeling of radio propagation, radio-frequency (RF) power consumption and complexity, and hardware impairments. To achieve this, we present several results across three core areas, i.e., signal propagation and channel modeling, RF transceiver design, and PHY enablers, offering useful insights into the development of sub-THz systems. Lastly, we provide an overview of sub-THz JCAS, emphasizing it as one of the most promising applications in the sub-THz range.
sub-THz RF transceiver design
6G
Sub-THz communications
sub-THz PHY enablers
sub-THz JCAS
sub-THz channel modeling
Författare
Italo Atzeni
Oulun Yliopisto
Gustavo Rodrigues de Lima Tejerina
Oulun Yliopisto
Rafael Berkvens
IMEC
Hui Chen
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Jean Marc Conrat
Aalto-Yliopisto
Mar Francis De Guzman
Technische Universität Dresden
Claude Desset
IMEC
Meik Dörpinghaus
Ericsson AB
Hamed Farhadi
Nokia
G. Fettweis
Ericsson AB
Florian Gast
Ericsson AB
Hardy Halbauer
Nokia
Rreze Halili
IMEC
Katsuyuki Haneda
Technische Universität Dresden
Ilkka Harjula
Orange Innovation
Bruno Jahan
Apple
Ramin Khayatzadeh
Nokia
Pekka Kyosti
Oulun Yliopisto
Rodolphe Legouable
Apple
Arto Lehti
Nokia
Dileepa Marasinghe
Oulun Yliopisto
Le Hang Nguyen
Nokia
Sharief Saleh
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Kaan Senparlak
Nokia
Nuutti Tervo
Oulun Yliopisto
Oskari Tervo
Orange Innovation
Henk Wymeersch
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Bo Xu
Nokia
Peize Zhang
Oulun Yliopisto
IEEE Open Journal of the Communications Society
2644125X (eISSN)
Vol. In PressÄmneskategorier (SSIF 2025)
Kommunikationssystem
Telekommunikation
Signalbehandling
DOI
10.1109/OJCOMS.2025.3591836