Linearly Precoded Rate Splitting for MIMO Broadcast Channels: From Constant-Gap Results to Precoder Design
Prof. Sheng Yang
CentraleSupélec, Department of Telecommunications
In this talk, we present our recent results on linearly precoded rate splitting (RS) for MIMO broadcast channels. The first part of the talk focuses on the information-theoretic characterization of the achievable rate region. We show that such RS scheme can achieve the capacity region to within a constant number of bits per channel use. We further present a sum rate upper bound showing that the constant-gap optimality does not extend beyond the two-user case. In the second part of the talk, we discuss the slightly more practical aspects of the RS scheme. In particular, we shall cover precoder design problems such as rate optimization, stream elimination, as well as adaptation for imperfect channel state information at the transmitter side.
Sheng Yang received the B.E. degree in electrical engineering from Jiaotong University, Shanghai, China, in 2001, and both the engineer degree and the M.Sc. degree in electrical engineering from Telecom ParisTech, Paris, France, in 2004, respectively. In 2007, he obtained his Ph.D. from Université de Pierre et Marie Curie (Paris VI). From October 2007 to November 2008, he was with Motorola Research Center in Gif-sur-Yvette, France, as a senior staff research engineer. Since December 2008, he has joined CentraleSupélec where he is currently a full professor. From April 2015, he also holds an honorary professorship in the department of electrical and electronic engineering of the University of Hong Kong (HKU). He received the 2015 IEEE ComSoc Young Researcher Award for the Europe, Middle East, and Africa Region (EMEA). He is an editor of the IEEE transactions on wireless communications.