Technical Talk on In-band Full-duplex Technology for 6G Mobile Networks

#communication #electronic-circuits

Abstract

In-band full-duplex (IBFD) communication, which enables simultaneous transmission and reception over the same frequency channel, has emerged as a key enabler for sixth-generation (6G) networks. By doubling spectral efficiency in principle, IBFD offers a compelling response to the escalating demand for high-speed wireless connectivity. Beyond communication alone, IBFD also plays a pivotal role in integrated sensing and communication (ISAC), allowing a single hardware platform and waveform to simultaneously support data transmission and environmental sensing. The principal challenge in realising practical IBFD systems lies in mitigating self-interference (SI), the strong transmitter leakage that can overwhelm the receiver and severely degrade performance.

In this talk, I will present our advanced SI cancellation solutions, which integrate analog-domain suppression with digital-domain adaptive algorithms to achieve deep SI mitigation. By further incorporating antenna-domain isolation, we have developed an end-to-end IBFD prototype that unifies all three layers of SI suppression—antenna, analog, and digital—into a fully functional system.

I will then turn to the new challenges that arise in SI management for IBFD ISAC. Sensing echoes introduce additional mutual interference (MI) with uplink communication signals, and Doppler shifts induced by moving targets further complicate interference estimation and cancellation. To conclude, I will outline our recent research on advanced analog SIC techniques tailored to IBFD ISAC.

Presenter’s biography

Dr Tuyen Le is a Research Fellow at the School of Electrical and Data Engineering, Faculty of Engineering and Information Technology and a core member of the Global Big Data Technology Centre (GBDTC), UTS. His research interests include adaptive signal processing, integrated sensing and communication, and electronic circuits and systems.

 Dr Le is an active researcher in the field of in-band full-duplex communication technology. Scopus ranks him among the top four researchers in Australia in the area of full-duplex, self-interference, and antenna technologies. Dr Le's publications often feature proof-of-concept prototypes, demonstrating the practical impact of his research. His paper on adaptive filter algorithm and its implementation using off-the-shelf components was awarded with Best Student Paper Award in the 2019 International Telecommunications and Applications Conference (ITNAC). Dr Tuyen Le has attracted more than $1M funding from industry and government research contracts. He has served as a reviewer for most IEEE Transactions and a Technical Program Member of flagship conferences such as ICC 2022, 2023. 

 Dr. Tuyen Le received the B.E. degree from Le Quy Don Technical University, Vietnam in 2008, the M.E. degree from the University of Wollongong (UOW), Australia, in 2014, and the Ph.D. degree from the University of Technology Sydney (UTS), Australia, in 2020, all in telecommunications engineering.