On Integer-Forcing Precoding for the Gaussian MIMO Broadcast Channel
Broadcast communication using multiple transmit antennas has attracted a lot of interest due to the fact that the sum capacity of the system scales linearly with the minimum of the number of transmit antennas and the aggregate number of receive antennas. Thus, given enough receivers, capacity can be increased simply by adding more transmit antennas. A drawback of most existing techniques, however, is that they are either far from optimal or have high implementation complexity. In this talk, I will review a recently introduced approach called integer-forcing (IF) precoding, also known as downlink IF, which has the potential to outperform any linear precoding scheme, despite enjoying similar low complexity. I will then discuss our results for the special case of two receivers: an optimal choice of parameters for high SNR, leading to a finite (and small) asymptotic gap to the sum capacity, as well as an extension to general SNR that achieves performance very close to the sum capacity. Joint work with Gabriel Pivaro, Gustavo Fraidenraich and Behnaam Aazhang.
Danilo Silva received the B.Sc. degree from the Federal University of Pernambuco (UFPE), Recife, Brazil, in 2002, the M.Sc. degree from the Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil, in 2005, and the Ph.D. degree from the University of Toronto, Toronto, Canada, in 2009, all in electrical engineering.
From 2009 to 2010, he was a Postdoctoral Fellow at the University of Toronto, at the Ecole Polytechnique Fédérale de Lausanne (EPFL), and at the State University of Campinas (UNICAMP). In 2010, he joined the Department of Electrical Engineering, Federal University of Santa Catarina (UFSC), Brazil, where he is currently an Assistant Professor. His research interests include wireless communications, channel coding, information theory, and network coding.
Dr. Silva was a recipient of a CAPES Ph.D. Scholarship in 2005, the Shahid U.H. Qureshi Memorial Scholarship in 2009, and a FAPESP Postdoctoral Scholarship in 2010. He is a member of the Institute of Electrical and Electronics Engineers (IEEE) and of the Brazilian Telecommunications Society (SBrT).