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Smart Radio Environments with Intelligent Reflecting Surfaces for 6G Sub-Terahertz-Band Communications
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Technology for sixth-generation (6G) mobile communication system is now being widely studied. A sub-Terahertz band is expected to play a great role in 6G to enable extremely high data-rate transmission. This paper has two goals. (1) Introduction of 6G concept and propagation characteristics of sub-Terahertz-band radio waves. (2) Performance evaluation of intelligent reflecting surfaces (IRSs) based on beamforming in a sub-Terahertz band for smart radio environments (SREs). We briefly review research on SREs with reconfigurable intelligent surfaces (RISs), and describe requirements and key features of 6G with a sub-Terahertz band. After that, we explain propagation characteristics of sub-Terahertz band radio waves. Important feature is that the number of multipath components is small in a sub-Terahertz band in indoor office environments. This leads to an IRS control method based on beamforming because the number of radio waves out of the optimum beam is very small and power that is not used for transmission from the IRS to user equipment (UE) is little in the environments. We use beams generated by a Butler matrix or a DFT matrix. In simulations, we compare the received power at a UE with that of the upper bound value. Simulation results show that the proposed method reveals good performance in the sense that the received power is not so lower than the upper bound value.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E106-B No.9 pp.735-747
- Publication Date
- 2023/09/01
- Publicized
- 2023/05/23
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.2022FGI0002
- Type of Manuscript
- Special Section INVITED PAPER (Special Section on Technologies and Proof-of-Concept Activities for 5G Advanced and 6G)
- Category
Authors
Yasutaka OGAWA
Hokkaido University
Shuto TADOKORO
Hokkaido University
Satoshi SUYAMA
NTT DOCOMO, INC.
Masashi IWABUCHI
Nippon Telegraph and Telephone Corporation
Toshihiko NISHIMURA
Hokkaido University
Takanori SATO
Hokkaido University
Junichiro HAGIWARA
Hokkaido University
Takeo OHGANE
Hokkaido University
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Yasutaka OGAWA, Shuto TADOKORO, Satoshi SUYAMA, Masashi IWABUCHI, Toshihiko NISHIMURA, Takanori SATO, Junichiro HAGIWARA, Takeo OHGANE, "Smart Radio Environments with Intelligent Reflecting Surfaces for 6G Sub-Terahertz-Band Communications" in IEICE TRANSACTIONS on Communications,
vol. E106-B, no. 9, pp. 735-747, September 2023, doi: 10.1587/transcom.2022FGI0002.
Abstract: Technology for sixth-generation (6G) mobile communication system is now being widely studied. A sub-Terahertz band is expected to play a great role in 6G to enable extremely high data-rate transmission. This paper has two goals. (1) Introduction of 6G concept and propagation characteristics of sub-Terahertz-band radio waves. (2) Performance evaluation of intelligent reflecting surfaces (IRSs) based on beamforming in a sub-Terahertz band for smart radio environments (SREs). We briefly review research on SREs with reconfigurable intelligent surfaces (RISs), and describe requirements and key features of 6G with a sub-Terahertz band. After that, we explain propagation characteristics of sub-Terahertz band radio waves. Important feature is that the number of multipath components is small in a sub-Terahertz band in indoor office environments. This leads to an IRS control method based on beamforming because the number of radio waves out of the optimum beam is very small and power that is not used for transmission from the IRS to user equipment (UE) is little in the environments. We use beams generated by a Butler matrix or a DFT matrix. In simulations, we compare the received power at a UE with that of the upper bound value. Simulation results show that the proposed method reveals good performance in the sense that the received power is not so lower than the upper bound value.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2022FGI0002/_p
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@ARTICLE{e106-b_9_735,
author={Yasutaka OGAWA, Shuto TADOKORO, Satoshi SUYAMA, Masashi IWABUCHI, Toshihiko NISHIMURA, Takanori SATO, Junichiro HAGIWARA, Takeo OHGANE, },
journal={IEICE TRANSACTIONS on Communications},
title={Smart Radio Environments with Intelligent Reflecting Surfaces for 6G Sub-Terahertz-Band Communications},
year={2023},
volume={E106-B},
number={9},
pages={735-747},
abstract={Technology for sixth-generation (6G) mobile communication system is now being widely studied. A sub-Terahertz band is expected to play a great role in 6G to enable extremely high data-rate transmission. This paper has two goals. (1) Introduction of 6G concept and propagation characteristics of sub-Terahertz-band radio waves. (2) Performance evaluation of intelligent reflecting surfaces (IRSs) based on beamforming in a sub-Terahertz band for smart radio environments (SREs). We briefly review research on SREs with reconfigurable intelligent surfaces (RISs), and describe requirements and key features of 6G with a sub-Terahertz band. After that, we explain propagation characteristics of sub-Terahertz band radio waves. Important feature is that the number of multipath components is small in a sub-Terahertz band in indoor office environments. This leads to an IRS control method based on beamforming because the number of radio waves out of the optimum beam is very small and power that is not used for transmission from the IRS to user equipment (UE) is little in the environments. We use beams generated by a Butler matrix or a DFT matrix. In simulations, we compare the received power at a UE with that of the upper bound value. Simulation results show that the proposed method reveals good performance in the sense that the received power is not so lower than the upper bound value.},
keywords={},
doi={10.1587/transcom.2022FGI0002},
ISSN={1745-1345},
month={September},}
Copy
TY - JOUR
TI - Smart Radio Environments with Intelligent Reflecting Surfaces for 6G Sub-Terahertz-Band Communications
T2 - IEICE TRANSACTIONS on Communications
SP - 735
EP - 747
AU - Yasutaka OGAWA
AU - Shuto TADOKORO
AU - Satoshi SUYAMA
AU - Masashi IWABUCHI
AU - Toshihiko NISHIMURA
AU - Takanori SATO
AU - Junichiro HAGIWARA
AU - Takeo OHGANE
PY - 2023
DO - 10.1587/transcom.2022FGI0002
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E106-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2023
AB - Technology for sixth-generation (6G) mobile communication system is now being widely studied. A sub-Terahertz band is expected to play a great role in 6G to enable extremely high data-rate transmission. This paper has two goals. (1) Introduction of 6G concept and propagation characteristics of sub-Terahertz-band radio waves. (2) Performance evaluation of intelligent reflecting surfaces (IRSs) based on beamforming in a sub-Terahertz band for smart radio environments (SREs). We briefly review research on SREs with reconfigurable intelligent surfaces (RISs), and describe requirements and key features of 6G with a sub-Terahertz band. After that, we explain propagation characteristics of sub-Terahertz band radio waves. Important feature is that the number of multipath components is small in a sub-Terahertz band in indoor office environments. This leads to an IRS control method based on beamforming because the number of radio waves out of the optimum beam is very small and power that is not used for transmission from the IRS to user equipment (UE) is little in the environments. We use beams generated by a Butler matrix or a DFT matrix. In simulations, we compare the received power at a UE with that of the upper bound value. Simulation results show that the proposed method reveals good performance in the sense that the received power is not so lower than the upper bound value.
ER -
English
