报告时间：2025.12.18 10:30~12:00
报告地点：无线谷A1楼1306
报告人：Prof. Rodrigo de Lamare
Title: Iterative Joint Channel Estimation and Detection for Coded Multi-RIS-Assisted Multi-Antenna Systems
Abstract: In this seminar, we present an iterative channel estimation, detection and decoding (ICEDD) scheme for the uplink of multiuser multi-antenna systems assisted by multiple reconfigurable intelligent surfaces (RIS). A novel iterative code-aided channel estimation (ICCE) technique is developed that uses low-density parity-check (LDPC) codes and iterative processing to enhance estimation accuracy while reducing pilot overhead. The main idea is to exploit encoded pilots (EP), enabling the use of both pilot and parity bits to iteratively refine channel estimates. To further improve performance, an iterative channel tracking (ICT) method is proposed that takes advantage of the temporal correlation of the channel. An analytical evaluation of the proposed estimator is provided in terms of normalized mean-squared error (NMSE), along with a study of its computational complexity and the impact of the code rate. Numerical results validate the performance of the proposed scheme in a sub-6 GHz multi-RIS scenario with non-sparse propagation, under both LOS and NLOS conditions, and different RIS architectures.
Biography: Rodrigo C. de Lamare was born in Rio de Janeiro, Brazil, in 1975. He received his Diploma in electronic engineering from the Federal University of Rio de Janeiro in 1998 and the MSc and PhD degrees in electrical engineering from the Pontifical Catholic University of Rio de Janeiro (PUC-Rio) in 2001 and 2004, respectively. Since January 2006, he has been with the Communications Group, School of Physics, Engineering and Technology, University of York, United Kingdom, where he is a Professor. Since April 2013, he has also been a Professor at PUC-Rio. Dr de Lamare is a Fellow of the IEEE, served as editor for IEEE Wireless Communications Letters and IEEE Transactions on Communications, and is currently an associate editor of IEEE Transactions on Signal Processing. His research interests lie in communications and signal processing, areas in which he published over 600 papers in international journals and conferences.
