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PART A - IEEE GWANGJU SECTION SUMMARY

A.1 Executive Summary

In year 2015, the Section offered six technical and social meetings. Most technical activities

were given at the campus of GIST, Korea. Also, one international conference, ICCAIS, of

which IEEE served as a technical sponsor , was held in GIST.

The table below in this page is the list of Section Executive Committee members. Prof.

Minjae Lee, GIST Korea, has joined the IEEE Gwangju Section executive committee as

Membership Development Chair of Gwangju Section.

The Section will promote membership development by continuing to organize social and

technical meetings, give student awards in local technical meetings, encourage students to

form a chapter of their own, and organize local sports activities in the name of IEEE. In

addition, the Section will also aim to leverage IEEE Distinguished Lecturer programs to bring

world class scholars to Gwangju and give the students the opportunity to have close

interaction with them.

The executive committee members of the section include:

CHAIR Heun-No Lee heungno@gist.ac.kr

SECRETARY Jong Won Shin jwshin@gist.ac.kr

TREASURER Sung-Min Hong smhong@gist.ac.kr

VICE CHAIR JONG-IN SONG jisong@gist.ac.kr

MEMBERSHIP DEVELOPMENT

Minjae Lee minjae@gist.ac.kr

Kiseon Kim kskim@gist..ac.kr

MEMBER-AT-LARGE Yo-Sung Ho hoyo@gist.ac.kr

A.2 Financial Report

- Total amount left in the beginning of 2015 was 2,583,819KRW.

- Total deposit in 2015 was 4,411,969KRW including the donation of 1,000,000KRW.

- Total amount of interest incurred in 2015 was

552 + 724 + 1,172 + 875 = 3,323 KRW.

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PART B - ORGANIZATIONAL ACTIVITIES

B.1 Membership Development Activities

In 2015, there were several meetings and events for membership development. In January, Gwangju Section held a farewell year party for the member/non-member of IEEE. 40 people attended and we introduced what we are doing and activities we have planned in 2014 at IEEE Gwangju Section. We also have a MD event in December 24

th, in which 25 people showed up.

B.2 Professional and Continuing Education Activities

April 13th, 2014, IEEE Seminar

Speaker: Prof. Hosung Park, Assistant Professor, Chonnam National University

Topic: Sliding-Window Coded Modulation for Interference Management

Attendees: 10 members and 10 non-members

Gwangju Section invited Prof. Hosung Park who has newly joined Chonnam National University. Prof.

Park is interested in wireless communications and channel coding. In this talk, he introduced several method for interference management and his works on sliding window coded modulation. After the seminar, the members of the IEEE Gwangju Sections continued discussion with Prof. Park over the dinner.

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September 24th, 2015, IEEE board meeting

Attendees: Prof. Heung-No Lee, Prof. Jong Won Shin, Prof. Minjae Lee There was a small meeting including IEEE Gwangju Section Chain Prof. Heung-No Lee, Secretary/Treasurer Prof. Jong Won Shin, and Membership Development Chair Prof. Minjae Lee. Plans for membership development activities in 2015 and 2016 were mainly discussed.

October 1st, 2015, IEEE Seminar

Speaker: Jun-Hwan Lee, ph. D.

Topic: Worldwide 5G activities and millimeter wave communication techniques

Thursday, April 16, 2015, 16:00, #203, SIC B-Bldg. 2nd Floor, GIST

Sliding-Window Coded Modulation for Interference

Management

Hosung Park, PhD

Assistant Professor, Chonnam National University

Abstract

Smart management of interference would become one of the key enabling technologies for high-

spectral-efficiency, low-power, broad-coverage wireless communication. One important conceptual

technique at the physical layer is simultaneous decoding whereby each receiver decodes for the

desired signal as well as part or whole of interference. It achieves the optimal maximum likelihood

decoding performance in general, when the encoders are restricted to point-to-point random code

ensembles. However, each receiver in simultaneous decoding has to employ some form of multiuser

sequence detection, which usually requires high computational complexity to implement. The

proposed sliding-window coded modulation (SWCM) achieves the performance of simultaneous

decoding with point-to-point channel codes and low-complexity decoding. It is built on basic

components of network information theory, combinin g the ideas of block Markov coding and

sliding-window decoding and superposition coding and successive cancellation decoding. We

investigate the performance of SWCM for the two-user Gaussian interference channel and

demonstrate that SWCM provides a feasible solution to achieve the performance of simultaneous

decoding with existing point-to-point codes.

Bio:

Hosung Park received the B.S., M.S., and Ph.D. degrees in electrical engineering from Seoul

National University, Seoul, Korea, in 2007, 2009, and 2013, respectively. He was a postdoctoral

researcher at Institute of New Media and Communications, Seoul National University, Seoul, Korea,

from March 2013 to August 2013, and at Qualcomm Institute, California Institute for

Telecommunications and Information Technology, University of California, San Diego, CA, USA,

from September 2013 to January 2015. He is now an assistant professor at Dept. of Electronics and

Computer Engineering, Chonnam National University, Gwangju, Korea, from March 2015. His

research interests include low-density parity-check codes, coding theory, coding for memory,

communications systems, compressed sensing, network information theory, network coding, and

interference management for the next generation cellular networks.

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Attendees: 15 members and 15 non-members.

Kwangju Section invited a special guest; Dr. Lee who is a senior research of ETRI. He gave a seminar

titled “Worldwide 5G activities and millimeter wave communication techniques”. In this seminar,

recent activities about 5G standard of ITU-R and 3GPP were talked. He had a special interest on the

global 5G cooperative system. Millimeter wave communication, which is a key technology of 5G

communication, was also discussed with some examples like Giga KOREA project.

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October 7th

, IEEE Seminar

-Speaker: Dr. Te-Won Lee, President, Qualcomm Korea

-Topic: Next-gen communication and machine learning technologies in mobile devices

-Attendees: 10 members and 40 non-members

IEEE Gwangju Section invited a special guest, Dr. Te-Won Lee, who is IEEE Fellow and currently the president of Qualcomm Korea, a world leading company in mobile chipsets and modems. Although the details of the talk cannot be included in the report since it may contain confidential information, many students attended this seminar, learned about what is going on in the industry, project their future in the industry, and made a lot of questions.

Wednesday, October 7, 2015, 16:00-17:00, Haerim Hall, 1st Floor, SIC-B Bldg.

Next-gen communication and machine learning technologies in mobile devices

Lee Tae-won,

President, Qualcomm Korea

Thursday, October 1st

, 2015, 16:00-17:00, #201, SIC Building B

Worldwide 5G activities and millimeter wave communication techniques

Jun-Hwan Lee, Ph. D.

Senior Researcher, Electronics and Telecommunications Research Institute (ETRI), Korea

Abstract:

This seminar covers the standardization activities of ITU-R, 3GPP(3rd Generation Partnership Project). In

detail, overview about the role of various institute and plan for 5G mobile communications standardization will be given. On the other hand, there will be introduction 5G activities in EU, who is taking systematic action against 5G and other worldwide cooperative systems. Finally, discussion and sharing information

about millimeter wave based 5G mobile communication including Giga KOREA project, which is a representative domestic 5G research activity. This seminar will be a good opportunity to understand current

activities about 5G techniques and standardizations.

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October 19th, 2015, IEEE Seminar

-Speaker: Dr. Jae-Kyoung Ahn, Xilinx, San Jose

-Topic: Reliability Management for FPGA Chip

-Attendees: 15 members and 15 non-members

IEEE Gwangju Section invited a special guest, Dr. Jae-Gyung Ahn, who is currently working with Xilinx, San Jose, CA. In Xilinx, he is responsible for Design For Reliability (DFR) and evaluation of product-level reliability. Since his presentation covered practical aspects of reliability modeling,

typically investigated in the individual device level, it was a really valuable opportunity for students to gain a new insight on the practical reliability modeling.

Monday, October 19, 2015, 11:00-12:00, #201, SIC-B Bldg. 2nd floor

Reliability Management for FPGA Chip Jae-Gyung Ahn, PhD

Xilinx, San Jose

Abstract

Wafer-level reliability items are reviewed in modern CMOS technology including FINFET process. Aging simulation tool is widely used in design to confirm the impact of reliability on circuit performance and functionality. Over-drive applications are supported by EDA tools including aging simulation and EM tools. Budget-based reliability check is used instead of

conventional rule-based check and it helps to generate product-level reliability estimator, which predicts product lifetime and failure rate with various use conditions.

Biography

Jae-Gyung Ahn received Ph.D. degrees from Seoul National University, Seoul, South Korea, in

1995. He was in LG Semicon and Integrated Device Technology before joining Xilinx, San Jose, CA, in 2005. His main interest includes modeling of hot carrier effect with carrier transport, FEOL device integration, and wafer-level reliability. Since 2007, he has been responsible for DFR (Design For Reliability) and evaluation of product-level reliability. He has coauthored 21 publications and 26 US patents.

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December 11th, 2015, IEEE Seminar

Speaker: Sana Ullah, ph. D.

Topic: IEEE 802.15.6 MAC Overview

Attendees: 5 members and 10 non-members

Kwangju Section invited a special guest; Dr. Ullah who is a research scientist of CISTER Research

Centre, Portugal. He gave a seminar titled “IEEE 802.15.6 MAC Overview”. In this seminar IEEE 802.15.6 standard of wireless body area network (WBAN) was covered. He introduced growing needs of WBAN and gave executive summary about IEEE 802.15.6 MAC method. In addition, he pointed out the theoretical limits of IEEE 802.15.6 and the needs of further research.

Friday, December 11th

, 2015, 09:00-11:00, #206, SIC Building B

IEEE 802.15.6 MAC Overview

Sana Ullah, Ph. D.

Research Scientist, CISTER Research Centre, ISEP/IPP, PORTO, Portugal

Abstract:

IEEE 802.15.6 is a standard for Wireless Body Area Network (WBAN). It defines the communication protocol operates on, inside, or in vicinity of the body. Thus it has characteristics like limited range

(<0.01~2m), channel model including body effects (absorption, health effects), extremely low power consumption, scalable data rate (0.01~1 Mbps, up to 10Mbps), supporting of different classes of QoS, need of optimized, low complexity and low power MAC layer and localization of radios. In this seminar, an overview on WBAN and IEEE 802.15.6 standard will be given. In addition, there will be a discussion about theoretical limits of IEEE 802.15.6 and further research topics.

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December 23rd, 2015, IEEE Seminar

-Speaker: Prof. Dong Kook Kim, Professor, Chonnam National University

-Topic: Fundamentals of HMMs in Speech Recognition

-Attendees: 18 members and 18 non-members

Gwangju Section invited Prof. Dong Kook Kim who is a Professor in Chonnam National University. Prof. Kim originally majored in speech signal processing centered on automatic speech recognition, and now is interested in many areas of speech and audio processing. In this talk, for the entry-level researchers, Prof. Kim lectured about latent variable model and Hidden Markov model with an application of large vocabulary continuous speech recognition (LVCSR).

December 28th, 2015, IEEE Seminar

-Speaker: Dr. Woohyung Lim, Manager, SK Telecom

-Topic: Speech Recognition based on Weighted Finite-State Transducer

-Attendees: 10 members and 18 non-members

Gwangju Section invited Dr. Woohyung Lim, who is working as a Manager for the SK Telecom, the biggest wireless carrier company in Korea. In this talk, the weighted finite state transducer (WFST) is introduced for the entry-level researchers with easy examples for the speech recognition task. Indeed, several different module in the speech recognizer can be described as a WFST and then optimized altogether. Also he joined the dinner with IEEE members for the follow up discussion.

Wednesday, December 23, 2015, 14:00-15:30, Room 203, 2nd Floor, SIC-B Bldg.

Fundamentals of HMMs in Speech Recognition

Prof. Dong Kook Kim,

Professor, Chonnam National University

요약 :

이 세미나에서는 현재 음성인식에서 가장 많이 사용되고 있는 hidden Markov models (HMMs)과 관련된

구조와 핵심 알고리즘에 대해 살펴본다. 이를 위해 먼저 GMM 과 HMM 과 같은 은닉변수모델에 대해

살펴보고, 이들 모델 파라메터를 학습하기 위한 expectation maximization (EM) 알고리즘이 어떻게

적용되는지 알아본다. 또한 HMM 이 대용량음성인식 에 적용되기 위한 여러 가지 기법들을 제시한다.

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December 29th, 2015, IEEE Seminar

-Speaker: Dr. Sungho Lee, Managerial Researcher, KETI

-Topic: Wireless Power Transfer and Energy Harvesting Technique for IoT Devices

-Attendees: 10 members and 8 non-members

Monday, December 28, 2015, 15:00-16:00, Room 109, Dasan Bldg.

Speech Recognition based on Weighted Finite-

State Transducer

Dr. Woohyung Lim,

Manager, SK Telecom

요약 :

자동 음성인식의 원리를 이해하고 weighted finite-state transducer(WFST)가

음성인식에 어떻게 활용되고 있는지 알아본다.

WFST 는 현재 널리 사용되고 있는 hidden Markov model(HMM)에 기반한 음성인식

구조를 표현하는 데 매우 효과적인 구조이기 때문에, Kaldi 툴킷을 비롯한 많은

음성인식 시스템이 WFST 를 사용하고 있다. 음성인식을 위한 탐색공간을 WFST 로

표현함으로써 탐색공간 최적화를 모델 생성 시점에 수행할 수 있고, 이를 통해 디코딩

알고리즘을 간략화하여 인식시간을 크게 단축시킬 수 있다. 이러한 특징 때문에

WFST 는 대용량 연속음성 인식에 특히 적합하다.

본 세미나에서는 음성인식의 기본 원리와 WFST 관련 최적화 연산들에 대해 살펴보고 음성인식에 WFST 가

어떻게 활용되고 있는지를 실 예를 바탕으로 살펴보고자 한다.

약력 :

삼성전자 무선사업부 한국소프트웨어개발그룹(책임), 2007-2012

삼성전자 무선사업부 Voice 서비스개발그룹(책임), 2012-2013

SK Telecom 종합기술원(매니저), 2013~현재

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Gwangju Section invited Dr. Sungho Lee, who is working as a Managerial Researcher for KETI , In this talk, several industrial standards for wireless power transfer are introduced such as WPC, PMA and A4WP. Especially he shared circuit design experience and difficulties regarding wireless power transfer. He also briefly explained rectifier designs and methods to satisfy stability condition for different Low voltage drop regulators(LDO)

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December 31th, 2015, IEEE Seminar

-Speaker: Dr. Jongsun Kim , Associate professor, Hongik University

-Topic: High-Speed Clock Generation and Data Recovery Techniques for 60GHz Systems

-Attendees:6 members and 8 non-members

Tuesday, December 29, 2015, 16:00-17:00, Room 109, Dasan Bldg.

Wireless Power Transfer and Energy Harvesting

Technique for IoT Devices

Dr. Sungho Lee,

Managerial Researcher, KETI

Abstract

With increasing IoT devices, their battery time is a crucial key factor in choosing

applications. Small battery is preferred in mobile IoT devices for small and light

modules but limited for the long operating life. For increasing smart sensors and

wearable devices, many researches are putting to enhance the battery time using

auxiliary methods. In this talk, trends and designs of wireless power transfer (WPT)

and energy harvesting techniques will be introduced to extend the battery time,

removing external connectors and power cables. In this talk, major two standards of

WPT will be described from the standard specification level to prototype IC design

level. Also, several energy harvesting techniques will be briefly presented in circuit

level.

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Gwangju Section invited Professor Jongsun Kim, who is with Hongik University, In this talk, he began with fundamentals regarding clock generation methods and comparison between different architectures. Expecially a multiplying delay locked loop(MDLL) is explained compared to phase locked loop(PLL)

and its advantages and disadvantages are explained as introduction . Recent advances to improve jitter performance are also introduced and his major contribution regarding to fast clock edge selection scheme are shared with attendees.

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Tuesday, December 31, 2015, 15:00-16:00, Room 109, Dasan Bldg.

High-Speed Clock Generation and Data Recovery

Techniques for 60GHz Systems

Prof. Jongsun Kim, Ph.D.

School of Electronic and Electrical Engineering, Hongik University

Abstract

In this talk, a 10-20 Gbps serializer/deserializer (SerDes) with a phase interpolator (PI)

based clock and data recovery (CDR) circuit for high-speed and short-range 60GHz

wireless chip-to-chip communication is presented. The PI-based CDR uses an 8-

phase delay-locked loop (DLL) to produce a set of evenly spaced reference clock

phases. The phase vernier, then transforms the 8-phases to sampling clocks for the

sampler, which performs 2× oversampling to recover the data from the input signal.

Also, a new multiplying delay-locked loop (MDLL) is presented that can provide

programmable fractional-ratio frequency synthesis of de-skewed clock. The proposed

fractional-ratio MDLL (FMDLL) employs a new select logic for controlling three

operation modes and utilize a new phase detecting structure to achieve inherent

cancellation of internal phase offset.