讲演摘要

Multiple access refers to the way radio resources are shared among different users. The multiple access techniques used in 2G and 3G cellular networks were time-division multiple access (TDMA) and code-division multiple access (CDMA), both being used in conjunction with single-carrier transmission. A big leap came out when WiFi and 4G cellular standards were developed. All of these networks adopted orthogonal frequency-division multiplexing (OFDM) for transmission, but they differed in the way the radio resources were shared. While WiFi continued to use conventional TDMA, WiMAX used orthogonal frequency-division multiple access (OFDMA), and 3GPP LTE used OFDMA on the downlink and single-carrier frequency-division multiple access (SC-FDMA) on the uplink. For the development of future 5G networks, the 3GPP has already adopted OFDMA for Enhanced Mobile Broadband (eMBB) and Ultra Reliable Low Latency Communications (URLLC) traffics, but still no decision has been made for Massive Machine-Type Communications (mMTC) traffic, for which there are proposals based on non-orthogonal multiple access (NOMA). The literature is heavily based on Power-Domain NOMA, whose basic principle is to superpose user signals and make use of serial interference cancellation at the receiver. In this talk, we review Power-Domain NOMA, discuss the major issues related to this technique, and describe another concept (NOMA-2000), which avoids the power imbalance requirements for the superposed signals and opens up new directions.

讲演者简介

Hikmet Sari is currently Professor at Nanjing University of Posts and Telecommunications (NUPT) and Chief Scientist at Sequans Communications. From 2003 to 2016, he was Professor and Head of the Telecommunications Department atSupelec. Previously, he held various research and management positions at Philips, SAT (SAGEM Group), Alcatel, Pacific Broadband Communications, and Juniper Networks. He received his Engineering Diploma and Ph.D. from the ENST, Paris, and theHabilitation degree from the University of Paris-Sud. His distinctions include the IEEE Fellow Grade and the Blondel Medal in 1995, the Edwin H. Armstrong Achievement Award in 2003, the Harold Sobol Award in 2012, and election to the European Academy and to the Science Academy of Turkey in 2012.

Dr. Sari has been very active in the IEEE Communications Society and served in numerous volunteer and leadership positions including Vice President - Conferences, Distinguished Lecturer, Member of the IEEE Fellow Evaluation Committee, Member of the Awards Committee, Member of several Technical Committees, Chair of the GITC, Chair of the Communication Theory Symposium of ICC 2002, Technical Program Chair of ICC 2004, Executive Chair of ICC 2006, General Chair of PIMRC 2010, General Chair of WCNC 2012, Executive Chair of WCNC 2014, Executive Co-Chair of ICC 2016, Executive Chair of ICC 2017, Editor of the IEEE Transactions on Communications, Associate Editor of the IEEE Communications Letters, and Guest Editor of IEEE JSAC. He also served as General Chair of ICUWB 2014, Technical Program Chair of EuCNC 2015, and General Co-Chair of ATC 2016. He is now serving on the ComSoc Board of Governors as Director for Conference Operations and also as General Co-Chair of ATC 2018 and of PIMRC 2019.