Haifan Yin -
Date: - Location: Eurecom
This talk covers four topics related to multiple antenna technologies. (1) The curse of mobility in massive MIMO. Industry found that in mobility environments, the spectral efficiency of massive MIMO declines severely. We will show novel algorithms to address this practical challenge. In addition, a fluid antenna enabled method is also proposed to transform the time-varying channel to static channel by sliding the fluid antennas. (2) Superdirective antenna arrays. When the antenna spacing is made very small, the beamforming gain of an M-element linear array has the potential to achieve M^2. In this talk, we propose a dual-coupling based beamforming method to realize the so-called superdirectivity. A prototype is developed to validate the proposed method. (3) Holographic interference surface (HIS). Inspired by optical holography, we propose a channel sensing architecture called HIS. It relies on interfering the object waves with a pre-designed reference wave, and greatly reduces the hardware complexity and requires less time-frequency resources for channel estimation. A prototype of HIS is also developed. (4) Reconfigurable Intelligent Surface (RIS). Several prototypes of RIS have been developed by our group. We will show the hardware and a dynamic beamforming algorithm, as well as some experimental results in field trials. Finally, we will talk about the commercialization attempts of our RIS products. Short bio: Haifan Yin received the Ph.D. degree from EURECOM in 2016. From 2016 to 2017, he was a DSP Engineer at Sequans Communications, Paris, France. From 2017 to 2019, he was a Senior Research Engineer working on 5G standardization at Huawei, where he has made substantial contributions to 5G standards, particularly the 5G codebooks. Since May 2019, he has been a Full Professor with the School of Electronic Information and Communications, Huazhong University of Science and Technology. His current research interests include 5G and 6G networks, signal processing, machine learning, and massive MIMO systems. He was the National Champion of 2021 High Potential Innovation Prize awarded by the Chinese Academy of Engineering, a recipient of the China Youth May Fourth Medal (the top honor for young Chinese), and a recipient of the 2024 Stephen O. Rice Prize.
