Cong SunAssociate Professor, Beijing University of Posts and Telecommunications, China
Speech Title: Sum Rate Maximization for Discrete Phase Shifted RIS Aided Downlink Network
Abstract: Reconfigurable intelligent surface (RIS) with discrete phase shifts aided two-user downlink network is considered. The precoding beamforming and RIS parameters are jointly designed for sum rate maximization. The nonconvex problem is approximated through maximum ratio transmission, optimal power allocation and Courant penalty function techniques. Two algorithms are proposed for the approximated problem based on alternating direction of multipliers method and proximal gradient method, respectively. Simulations show that the two proposed algorithms achieve higher sum rate with significantly lower computational cost than the sate of the art.
Biography: Dr. Cong Sun works as an associate professor in Beijing University of Posts and Telecommunications (BUPT). She got her Bachelor of Science degree from in 2008 from BUPT, and the phD degree from the University of Chinese Academy of Sciences in 2013. She visited TU Dresden, Germany in 2012 and 2015. Dr. Sun’s main research interest is nonlinear optimization, especially the optimization in signal processing and wireless communications. She was supported by the 2017 Young Elite Scientists Sponsorship Program by the China Association for Science and Technology (CAST). She is member of council of Operations Research Society of China.