Plenary Talks
Plenary
Talk 1 (25 Jan. 2018)

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Mobile Communications Network
Evolution and Distributed MIMO for 5G Enhanced Mobile
Broadband
Fumiyuki
Adachi (Specially
Appointed Prof.,Tohoku University, Japan)
Specially
Appointed Professor, Research Organization of Electrical
Communication (ROEC)
2-1-1 Katahira, Aoba-Ku, Sendai, Miyagi, 980-8577, Japan
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Abstract
Mobile communications network has now evolved into the 4th generation
(4G). Mobile broadband services have been becoming more and more
popular. Recently, the development of 5G network for providing 5G
enhanced mobile broadband (eMBB) services is on-going worldwide. Since
the available frequency bandwidth is limited, the area spectrum
efficiency (ASE), bps/Hz/km2, has been the most important concern for
the last few decades. An increasing popularity of broadband services
causes a problem of increased energy consumption. Therefore, the energy
efficiency (EE), bits/Joule, has also become an important concern for
battery operated mobile terminals in particular. Distributed MIMO can
improve both ASE and EE simultaneously.
After briefly overviewing the evolution of mobile communications
network, , we will introduce the recent advances in distributed MIMO. A
number of distributed antennas are deployed over a traditional
macro-cell area covered by a macro-cell base station (MBS). They are
connected to the MBS by the optical mobile fronthaul. Distributed MIMO
exploits the spatial distribution of both antennas and users. Some of
distributed antennas near a user terminal are selected to perform
distributed MIMO cooperative transmission, which includes
frequency-domain equalization, single-user MIMO diversity, multi-user
MIMO multiplexing, and low peak-to-average power ratio (PAPR) waveform
design. Also, we will present multi-user scheduling and MIMO channel
estimation. Since distributed antennas near a user are selected, MIMO
channel has a sparse structure. This sparsity of MIMO channel can be
exploited for channel estimation.
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 research on 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. He was a full professor
at the Graduate School of Engineering until March 2016, and now a
Specially Appointed Professor for Research at the Research Organization
of Electrical Communication (ROEC) at the same university. His research
interests lie in the area of wireless signal processing and networking,
e.g., multi-access, equalization and diversity, MIMO, radio resource
management, etc.).
He is an IEICE Fellow and an IEEE Life Fellow. He is a recipient of the
IEEE Vehicular Technology Society Avant Garde Award 2000, IEICE
Achievement Award 2002, Thomson Scientific Research Front Award 2004,
Ericsson Telecommunications Award 2008, Telecom System Technology Award
2009, Prime Minister Invention Award 2010, British Royal Academy of
Engineering Distinguished Visiting Fellowship 2011, KDDI Foundation
Excellent Research Award 2012, C&C Prize 2014, Rinzaburo Shida Award
2017, Sendai Municipal Commendation 2017, and IEEE VTS Stuart Meyer
Memorial Award 2017. He is listed in Highly Cited Researchers 2001 (
http://hcr.stateofinnovation.thomsonreuters.com/page/archives).
Plenary
Talk 2 (25 Jan. 2018)

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The Evolution of Memory Solutions
for Cloud era and its Challenges
Jong
Hoon Oh (Senior
Vice President / GM, SK Hynix Inc, Korea)
Senior
Vice President /GM, DRAM Development & Business
SK
HYNIX INC
2091, Gyeongchung-daero, Bubal-eup, Icheon-si, Gyeonggi-do,
Korea
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Abstract
Information Communication Technology has been drastically developed
and evolved. Succeeding mobile era flourished by smartphones,
data-driven applications are expanding and thriving based on the cloud
data centers. It is not merely the increase in the amount of data
traffic, but leads to the transformation from compute-driven
architecture into multiple innovative ones in wide range of cloud
infrastructure. It may include deep learning solution adapted for
emerging artificial intelligence (AI) services, high-performance
computing (HPC) and in-memory solution for big data and emerging
applications. Software-defined infrastructure (SDI) also diversifies
the competitiveness of hardware components into more disaggregated
way. The mutual effect between advanced infrastructure and emerging
smart devices is obvious to contribute prompting new applications. So
far, the enhancement of CPU has driven the progress in the
infrastructure to support wide spectrum of hardware requirements.
However, in the data-driven cloud era, balanced improvement between
processor and memory/storage system becomes more important.
In this talk, we will discuss the challenges that the memory industry
is facing and share the idea for the memory solutions and its advances
to lead memory-centric domain.
Major Achievements
- Designed and Developed World-leading DRAM Products-4M DRAM
(fastest), 16M SDRAM (1st with wave pipelining), 64M RDRAM (direct
ver.), CellularRAM, DDRx, LPDDRx, GDDRx. HBM, etc.
- Industry contribution in Memory Standard development
- Focus on DRAM scaling limit and memory solution development
- Invented / Co-invented 50+ U.S. Patents
Plenary
Talk 3 (25 Jan. 2018)

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Information Theory Insights Into Energy
Consumption in Wireless Networks
Anders
Host-Madsen (Prof.,
University of Hawaii at Manoa, USA)
Department
of Electrical Engineering
University of Hawaii at Manoa, Honolulu, HI 96822
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Abstract
Information theory has been fundamental to the development of wireless
communications. Results from information theory have been instrumental
in increasing capacity of wireless networks. However, in addition to
capacity, energy consumption is an important design consideration is
wireless networks. It influences battery life of wireless devices, as
well as the environment in a not insignificant way. In this talk we will
discuss the insights into energy consumption that has been provided by
information theory, and how this should influence design of wireless
networks and devices. We will show how network topology and constraints
on bandwidth and delay affects energy, and which design strategies can
be employed to overcome these constraints.
Biography
Anders Hos
t-Madsen was born in
Denmark in 1966. He received the M.Sc. degree in engineering in 1990 and
the Ph.D. degree in mathematics in 1993, both from the Technical
University of Denmark.
From 1993 to 1996 he was with Dantec Measurement Technology A/S,
Copenhagen, Denmark, from 1996 to 1998 he was an assistant professor at
Kwangju Institute of Science and Technology, Kwangju, Korea, and from
1998 to 2000 an assistant professor at Department of Electrical and
Computer Engineering, University of Calgary, Calgary, AB, Canada, and a
staff scientist at TRLabs, Calgary. Since 2001 he has been with the
Department of Electrical Engineering, University of Hawaii at Manoa,
Honolulu, since 2009 as professor. He was also a founder and CTO
(2007-2008) of Kai Medical, Inc., which is making equipment for
non-contact heart monitoring. His research interests are in statistical
signal processing, information theory, and wireless communications,
including ad-hoc networks, cooperative diversity, wireless sensor
networks, heart monitoring, life detection, and marine mammal signal
processing.
He has served as Editor for Multiuser Communications for the IEEE
Transactions on Communications and as Associate Editor for Detection and
Estimation for the IEEE Transactions on Information Theory. He was
general co-chair of ISITA 2012 and IEEE ISIT 2014. He received the
Eurasip Journal of Wireless Communications and Networks (JWCN) best
paper award in 2006. He is a Fellow of IEEE.