Experimental Validation of Time Reversal Multiple Access for UWB Wireless Communications Centered at the 273 GHz Frequency

• Published in: 2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring) pp. 1 - 5
• Main Authors: Mokh, Ali, Rosny, Julien de, Alexandropoulos, George C., Kamoun, Mohamed, Ourir, Abdelwaheb, Khayatzadeh, Ramin, Tourin, Arnaud, Fink, Mathias
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-06-2022
• Subjects: 6G mobile communication; Frequency division multiaccess; Frequency modulation; low-complexity reception; Precoding; pulse position modulation; THz communications; Time reversal; Time-frequency analysis; UWB; Vehicular and wireless technologies; Wireless networks
• DOI: 10.1109/VTC2022-Spring54318.2022.9860737
• EISSN: 2577-2465

Ultra-high data rates with low-power consumption wireless communications and low-complexity receivers is one of the key requirements for the next 6-th Generation (6G) of communication networks. Sub-Terahertz (SubTHz) frequency bands can support Ultra-WideBand (UWB) communications and can thus offer unprecedented increase in the wireless network capacity, rendering those bands and relevant research a strong candidate technology for 6G. However, in contrast to millimeter-wave communications, the technological advances in subTHz transceivers are not yet completely mature. In this paper, we focus on the Time Reversal (TR) precoding scheme, which is a computationally simple and robust technique capable of focusing UWB waveforms on both time and space, by exploiting channel diversity when available. We design a novel experimental setup, including a THz link inside a waveguide and operating at the carrier frequency 273.6 GHz with 2 GHz transmission bandwidth, and deploy it to perform multi-user communications with simple modulation. Our results demonstrate large communication rates with only 3 mm space separation of the receiving antennas.