Mobile Telecommunications Research Lab
Prof. KyungHi Chang
 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
ACTIVITIES
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
RESEARCH
3GPP LTE-A & 5G Systems
Pattern & Polarization Antenna / Codebook Design
HetNet & Small Cells
X-layer Design & RRM
Interference Management
Mobile Ad-hoc Network
Ship Ad-hoc Network
PHY & MAC Layer Optimization
Multi-hop Synchronization
Cognitive Radio
Spectrum Sensing, Decision, Sharing & Mobility
Ad-hoc CR Network
Underwater Communication / Green IT
INHA UNIVERSITY
Mobile Telecommunications Research Lab
AWARDS
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)
CONTACT
Office
Tel / Fax
E-mail
Homepage
:
:
:
:
High-tech BD #303
+82-32-860-8422 / +82-32-865-0480
khchang@inha.ac.kr
http://mobile.inha.ac.kr
1
3GPP LTE-A & 5G Cellular Systems
Interference Mitigation
(SAIC)
Channel Estimation
Inter-Cell
Interference
Mobility
Hand-off
3G LTE -A & 5G Systems
HetNet & Small Cells
MIMO Techniques
Antenna Selection / Scheduling
Precoding / MIMO Detection
Pattern & Polarization Antenna
Codebook Design
Interference Management
Interference Mitigation / Avoidance /
Suppression / Alignment
Cognitive Radio
Spectrum Sensing, Decision, Sharing & Mobility
Ad-hoc CR Network
WMAN Advanced System
M-WiMAX Evolution
DFE, Synchronization & Detection
Performance Optimization
FLP / FXP Design
DMB & UWB
Interference Analysis
Coverage / Throughput Optimization
Iterative Channel Estimation
Hybrid Double-Dwell Acquisition
INHA UNIVERSITY
Mobile Telecommunications Research Lab
2
Cross-Layer Design / Mobile Ad-hoc Network
Cross-Layer Design Issues
Research Topics
Radio Resource Management
Dynamic User Selection
Dynamic Channel / Power Allocation
Optimization of CQI Feedback Load
Inter-Cell Interference Mitigation
Management of Heterogeneous QoS
Multi-hop Synchronization
Applications
3GPP LTE -A, 5G Mobile Access Systems
WMAN-Advanced, Ship Ad-hoc Network
SANET
Multi-hop Cellular Networks
INHA UNIVERSITY
Mobile Telecommunications Research Lab
3
RFID / USN
Research Topics
Application of Class 4 Active RFID Relay System
Analysis of RFID & USN Systems
Pa r t s C h e c k in g &
C on t r ol l in g Se n s or
Pe op l e T r a c k in g
T ag
Passive / Semi-Passive / Active RFID
Tag / Reader Anti-collision Algorithms
Protocols, Application, etc.
Pros & Cons of RFID & USN System
V e h ic l e M on it or in g
& T r a c k in g T a g
RFID Hardware and Software Feasibility
Server
Active Reader
(Interrogator)
Relay Tag
Reader MAC SW
Bench Scale Testing of Hardware
Reader Testing and Modification in
Multiple Reader & Tag Environments
Etc.
C on t a in e r T a g
Active Tag
Sensor Node
T r a f f ic
M on it or in g
Se n s or
Class 4 Active RFID Multi-hop Relay System
Cr ack
Se n s or
Service Scenario / Topology Design
Active RFID Multi-hop Relay Protocol
Performance Evaluation
 IR UWB / CSS
Wa t e r Pol l u t ion
Se n s or
Cargo Warehouse Readers Deployment
Coverage & Throughput of Multi-hop RFID
160
300
140
1-hop (AWGN)
2-hop (AWGN)
3-hop (AWGN)
1-hop (CM1)
250
2-hop (CM1)
3-hop (CM1)
120
200
Throughput (kbps)
Coverage [m]
100
80
60
150
100
40
1-hop (IR-UWB)
2-hop (IR-UWB)
3-hop (IR-UWB)
1-hop (CSS)
2-hop (CSS)
3-hop (CSS)
50
20
0
-100
INHA UNIVERSITY
Mobile Telecommunications Research Lab
-99
-98
-97
-96
-95
-94
Sensitivity [dB]
-93
-92
-91
-90
0
0
100
200
300
400
500
600
Number of Tags
700
800
900
1000
4