INHA UNIVERSITYMobile Telecommunications Research Lab 1

3GPP LTE-A & 5G SystemsPattern & Polarization Antenna / Codebook Design

HetNet & Small Cells

X-layer Design & RRM

Interference Management

Mobile Ad-hoc NetworkShip Ad-hoc Network

PHY & MAC Layer Optimization

Multi-hop Synchronization

Cognitive RadioSpectrum Sensing, Decision, Sharing & Mobility

Ad-hoc CR Network

Underwater Communication / Green IT

IEEE Senior Member

Executive Director for Journal of KICS / Life Member of KICS, IEEK & KEES

International IT Standardization Expert, TTA

ITU-R TG8/1 IMT.MOD Editor / 3GPP LTE-A, IEEE 802.16 (WMAN/WiBro) & 802.22 (WRAN/CR) Standardization

Office : High-tech BD #303

Tel / Fax : +82-32-860-8422 / +82-32-865-0480

E-mail : khchang@inha.ac.kr

Homepage : http://mobile.inha.ac.kr

Mobile Telecommunications Research Lab

1985 : Electronics Engineering, Yonsei University, Seoul, KOREA (BS)

1987 : Electronics Engineering, Yonsei University, Seoul, KOREA (MS)

1992 : Electrical Engineering, Texas A&M University, College Station, TX, USA (Ph.D)

1989 ~ 1990 : Researcher, Samsung Advanced Institute of Technology (SAIT), Yongin, KOREA

1992 ~ 2003 : Team Leader (Principal Member of Technical Staff), ETRI, Daejeon, KOREA

2003 ~ present : Professor, Mobile Telecommunications Research Laboratory, Electronic Engineering Department, Inha University, 253 Yonghyun-Dong, Nam-Gu, Incheon 402-751, KOREA

Prof. KyungHi Chang

ACTIVITIES

RESEARCH

CONTACT

LG Paper Award (Nov. 2006)

Haedong Paper Award (Nov. 2007)

KICS Distinguished Service Award (2007, 2009, 2012)

Inha Univ. Research Award (Jan. 2008)

KOITA Enterprise R&D Cluster Distinguished Svc. Award (2009)

IEEE ComSoc Paper Award (Apr. 2009)

Haedong Academic Award (Nov. 2010)

AWARDS

INHA UNIVERSITYMobile Telecommunications Research Lab 2

3GPP LTE-A & 5G Cellular Systems

Inter-CellInterference

Mobility

Interference Mitigation(SAIC)

Hand-off

Channel Estimation

HetNet & Small Cells

MIMO Techniques

Antenna Selection / Scheduling

Precoding / MIMO Detection

Pattern & Polarization Antenna

Codebook Design

Interference Management

Interference Mitigation / Avoidance / Sup-pression / Alignment

M-WiMAX EvolutionDFE, Synchronization & DetectionPerformance OptimizationFLP / FXP Design

Spectrum Sensing, Decision, Sharing & MobilityAd-hoc CR Network

Interference AnalysisCoverage / Throughput Optimization Iterative Channel EstimationHybrid Double-Dwell Acquisition

3G LTE -A & 5G Systems

WMAN Advanced System

Cognitive Radio

DMB & UWB

INHA UNIVERSITYMobile Telecommunications Research Lab 3

3GPP LTE -A, 5G Mobile Access Systems

WMAN-Advanced, Ship Ad-hoc Network

Cross-Layer Design / Mobile Ad-hoc Network

Radio Resource ManagementDynamic User Selection

Dynamic Channel / Power Allocation

Optimization of CQI Feedback Load

Inter-Cell Interference Mitigation

Management of Heterogeneous QoS

Multi-hop Synchronization

Cross-Layer Design Issues Research Topics

Applications

Multi-hop Cellular Networks

SANET

INHA UNIVERSITYMobile Telecommunications Research Lab 4

RFID / USN

Analysis of RFID & USN SystemsPassive / Semi-Passive / Active RFID

Tag / Reader Anti-collision Algorithms

Protocols, Application, etc.

Pros & Cons of RFID & USN System

RFID Hardware and Software FeasibilityReader MAC SW

Bench Scale Testing of Hardware

Reader Testing and Modification in Multiple Reader & Tag Environments

Etc.

Class 4 Active RFID Multi-hop Relay SystemService Scenario / Topology Design

Active RFID Multi-hop Relay Protocol

Performance Evaluation IR UWB / CSS

Research TopicsApplication of Class 4 Active RFID Relay System

Server

Active Reader(Interrogator)

Relay Tag

Active Tag

Sensor Node

Water Pollution Sensor

Container Tag

Vehicle Monitoring & Tracking Tag

CrackSensor

People Tracking Tag

Parts Checking & Controlling Sensor

Traffi c Monitoring

Sensor

-100 -99 -98 -97 -96 -95 -94 -93 -92 -91 -900

20

40

60

80

100

120

140

160

Sensitivity [dB]

Cov

erag

e [m

]

1-hop (AWGN)2-hop (AWGN)

3-hop (AWGN)

1-hop (CM1)

2-hop (CM1)3-hop (CM1)

0 100 200 300 400 500 600 700 800 900 10000

50

100

150

200

250

300

Number of Tags

Thr

ough

put

(kbp

s)

1-hop (IR-UWB)2-hop (IR-UWB)

3-hop (IR-UWB)

1-hop (CSS)

2-hop (CSS)3-hop (CSS)

Coverage & Throughput of Multi-hop RFID

Cargo Warehouse Readers Deployment