Keynote Speakers

Keynote Speech 1

Title: "Cooperation techniques in ad-hoc and infrastructure-based wireless networks"
 

Speaker: Dr. Andy Molisch

 

Affiliation: University of Southern California, Los Angeles, CA, USA

Abstract: For almost a century, the paradigm of wireless communications has been that different users and services compete for resources, in particular spectrum and airtime. However, in recent years, a new trend has emerged: wireless nodes can collaborate, in order to enhance the performance for all nodes.

In cellular communications, this paradigm has led to the concept of base station cooperation, where multiple base stations are connected through high-speed links, and thus form a "giant MIMO system"; this essentially eliminates interference. The talk will outline the principles of such networks, as well as signal processing for exploiting its capabilities, as well as relevant propagation channel models to evaluate its performance in realistic situations.

We will then turn our attention to ad-hoc networks, where collaboration of nodes in forwarding information can be used to enhance the reliability as well as the energy efficiency of such networks. We will outline the different physical-layer collaboration methods, and discuss their impact on routing and resource allocation schemes. An outlook to future research challenges concludes the talk.

Biography: Andy Molisch received the Dr. techn., and habilitation degrees from the Technical University Vienna (Austria) in 1994, and 1999, respectively. After working at AT&T (Bell) Laboratories, he joined Mitsubishi Electric Research Labs, Cambridge, MA, USA, where he rose to Distinguished Member of Technical Staff and Chief Wireless Standards Architect. Concurrently he was also Professor and Chairholder for radio systems at Lund University, Sweden. Since 2009, he is Professor of Electrical Engineering at the University of Southern California, Los Angeles, CA, USA.

Dr. Molisch’s current research interests are measurement and modeling of mobile radio channels, UWB, cooperative communications, and MIMO systems. He has authored, co-authored or edited four books (among them the textbook "Wireless Communications"), eleven book chapters, more than 120 journal papers, and numerous conference contributions, as well as more than 70 patents and 60 standards contributions.

Dr. Molisch has been an editor of a number of journals and special issues, General Chair, TPC Chair, or Symposium Chair of multiple international conferences, and chairman of various international standardization groups. He is a Fellow of the IEEE, a Fellow of the IET, an IEEE Distinguished Lecturer, and recipient of several awards.

 

Keynote Speech 2
 

Title: Recent Advances in Broadband Wireless Technology
 

Speaker: Prof. Fumiyuki Adachi

Affiliation: Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, 6-6-05 Aza-Aoba, Aramaki, Aoba-ku, Sendai, 980-8579 Japan

Abstract: Every about 10 years, a new wireless technology appeared and significantly　changed the mobile communications systems. Mobile communications systems have been evolving from 1G to 3G to offer the users a variety of high speed data communication services in addition to traditional voice communication services. 3.5G systems with enhanced transmission capability of around 14Mbps are rapidly deployed all over the world. 3.9G or 3G LTE systems with a much faster data transmission capability of 50-100Mbps will appear this year. OFDMA and SC-FDMA both with simple one-tap frequency-domain equalization (FDE) are adopted as the downlink and uplink multi-access techniques, respectively. SC-FDMA has lower PAPR than OFDM and this is the reason for its adoption for the uplink. However, this data rate is not sufficient for the 4G systems. The development of broadband wireless technology that can achieve data transmissions of higher-than-1Gbps is necessary. The wireless channel for such broadband transmissions is severely frequency-selective. Frequency-domain wireless signal processing may play an important role in achieving a good signal transmission performance. Unfortunately, the available wireless bandwidth is limited while a higher-than-1Gbps transmission is demanded. Particular attention has been paid to multi-input/multi-output (MIMO) multiplexing to significantly increase the throughput without expanding the signal bandwidth. Besides the broadband wireless signal processing, another important issue exists. Broadband data services need prohibitively high transmit power if the present network architecture is employed. A new wireless network that can significantly reduce the transmit power is required. An introduction of distributed antenna network architecture is a promising solution to this issue. In this talk, we will overview the state-of-the-art broadband wireless technology.

Biography: Fumiyuki Adachi received the B.S. and Dr. Eng. degrees in electrical engineering from Tohoku University, Sendai, Japan, in 1973 and 1984, respectively. In April 1973, he joined the Electrical Communications Laboratories of Nippon Telegraph & Telephone Corporation (now NTT) and conducted various types of research related to digital cellular mobile communications. From July 1992 to December 1999, he was with NTT Mobile Communications Network, Inc. (now NTT DoCoMo, Inc.), where he led a research group on Wideband CDMA for 3G systems. Since January 2000, he has been with Tohoku University, Sendai, Japan, where he is a Professor of Electrical and Communication Engineering at the Graduate School of Engineering. His research interests are in wireless signal processing including wireless access, equalization, transmit/receive antenna diversity, MIMO, adaptive transmission, and channel coding.

He is an IEEE Fellow and an IEICE Fellow. He was a co-recipient of the IEEE Vehicular Technology Society Avant Garde Award 2000, IEICE Achievement Award 2002, Thomson Scientific Research Front Award 2004, and Ericsson Telecommunications Award 2008.