Hybrid Beamforming for Terahertz Wireless Communications with Beam Squint: A Survey

WU Yezeng; XIAO Lixia; LIU Guanghua; JIANG Tao

doi:10.1049/cje.2022.00.309

Volume 31 Issue 6

Nov. 2022

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WU Yezeng, XIAO Lixia, LIU Guanghua, et al., “Hybrid Beamforming for Terahertz Wireless Communications with Beam Squint: A Survey,” Chinese Journal of Electronics, vol. 31, no. 6, pp. 1043-1052, 2022, doi: 10.1049/cje.2022.00.309

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WU Yezeng, XIAO Lixia, LIU Guanghua, et al., “Hybrid Beamforming for Terahertz Wireless Communications with Beam Squint: A Survey,” Chinese Journal of Electronics, vol. 31, no. 6, pp. 1043-1052, 2022, doi: 10.1049/cje.2022.00.309

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Hybrid Beamforming for Terahertz Wireless Communications with Beam Squint: A Survey

doi: 10.1049/cje.2022.00.309

WU Yezeng^{1, 2},
XIAO Lixia¹,
LIU Guanghua¹,
JIANG Tao^{1, 2
,}

1.
Research Center of 6G Mobile Communications, School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2.
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

Funds: This work was supported by the National Key Research and Development Program of China (2019YFB1803400) and Fundamental Research Funds for the Central Universities (2020kfyXJJS111).

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Author Bio:
Yezeng WU received the B.S. and M.S. degrees in information and communication engineering from the School of Information Science and Technology, Nantong University, Nantong, China, in 2017 and 2020, respectively. He is currently pursuing the Ph.D. degree with the Research Center of 6G Mobile Communications, Wuhan National Laboratory for Optoelectronics and School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan, China. His research interests include signal processing for wideband THz communication, hybrid beamforming, and ultra-massive MIMO systems

Lixia XIAO received the B.E., M.E., and Ph.D. degrees from the University of Electronic Science and Technology of China, Chengdu, China, in 2010, 2013, and 2017, respectively. From 2016 to 2017, she was a visiting student with the School of Electronics and Computer Science, University of Southampton. From 2018 to 2019, she has been a Research Fellow with the Department of Electrical Electronic Engineering, University of Surrey. She is currently a Full Professor with the Research Center of 6G Mobile Communications, School of Cyber Science and Engineering, Huazhong University of Science and Technology. She mainly works on key technologies of the physical layer, including massive MIMO design, deep learning based signal processing, new multi-carrier transmission, etc

Guanghua LIU is currently an Associate Professor with the Research Center of 6G Mobile Communications, School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan, China. He received the Ph.D. degree in information and communication engineering from Huazhong University of Science and Technology in June 2019. From October 2017 to April 2019, he was with the State University of New York at Buffalo. From August 2019 to March 2022, he was with the School of Physics, Huazhong University of Science and Technology as a special Associate Research Fellow. His research interests include wireless underground sensor networks, wireless power transfer, rescue communications, and network science

Tao JIANG (corresponding author) is currently a Chair Professor with the Research Center of 6G Mobile Communications, School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan, China. He has authored/co-authored about 500 papers in major journals/conferences. He is served or serving as Associate Editor of some technical journals in communications, including IEEE Network, IEEE Transactions on Signal Processing, IEEE Communications Surveys and Tutorials, IEEE Transactions on Vehicular Technology, and he is the Area Editor of IEEE Internet of Things Journal and Associate Editor-in-chief of China Communications, etc. (Email: taojiang@hust.edu.cn)
Received Date: 2022-09-14
Accepted Date: 2022-10-20

Available Online: 2022-11-11

Publish Date: 2022-11-05

Abstract

Abstract

Benefiting from the ultra-wide bandwidth, terahertz (THz) communication is considered one of the core technologies of the 6G mobile communication. However, high path loss is a severe issue for THz band, which needs to be solved by the ultra-massive multiple-input multiple-output (MIMO) technology. For the sake of reducing the hardware cost and power comsumption, the hybrid beamforming technology is required, which has been adopted in the 5G communication. In the hybrid beamforming for the THz wideband system, the enormous antenna and ultra-wide bandwidth cause the spatial- and frequency-wideband effect, resulting in acute beam squint. Eliminating beam squint is the key to the engineering realization of ultra massive MIMO for the THz band. To circumvent this issue, this paper presents a comprehensive overview of the hybrid beamforming technology including the channel model, the traditional phase shifter based and the true time delay based architectures, the 3D hybrid beamforming for the uniform planar array. Finally, multiple significant open issues and potential challenges are pointed out and elaborated.
- Terahertz,
- Ultra-massive MIMO,
- Hybrid beamforming,
- Beam squint,
- True time delay

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References(47)

References

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