Sekchin CHANG


A Novel Receiver for Reliable IoT Communications Based on ZigBee under Frequency-Selective Indoor Environments
Minhyuk KIM Sekchin CHANG 
Publication:   
Publication Date: 2017/02/01
Vol. E100-A  No. 2  pp. 361-365
Type of Manuscript:  Special Section LETTER (Special Section on Reliable Communication and Control)
Category: 
Keyword: 
novel receiverIoT communicationsZigBeefrequency-selectiveindoor
 Summary | Full Text:PDF(520.6KB)

An Interference-Aware Clustering Based on Genetic Algorithm for Cell Broadcasting Service
Kyungho JUN Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/12/01
Vol. E96-A  No. 12  pp. 2740-2744
Type of Manuscript:  LETTER
Category: Communication Theory and Signals
Keyword: 
interference-aware clusteringgenetic algorithmcell broadcasting service
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A Cooperative Spectrum Sensing Scheme Based on Consensus in Cognitive Radio Systems
Mihwa SONG Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/11/01
Vol. E96-A  No. 11  pp. 2179-2181
Type of Manuscript:  Special Section LETTER (Special Section on Smart Multimedia & Communication Systems)
Category: Mobile Information Network and Personal Communications
Keyword: 
spectrum sensingconsensuscognitive radio
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An Efficient Timing-Offset Estimation Scheme for Cooperative Networks
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/11/01
Vol. E95-A  No. 11  pp. 1941-1944
Type of Manuscript:  Special Section LETTER (Special Section on Signal Design and Its Applications in Communications)
Category: Mobile Information Network
Keyword: 
timing-offset estimationperiodic training dataLMSEcooperative networks
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An Efficient Synchronization Scheme for Cooperative WBAN in Wireless Medical Telemetry Systems
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/10/01
Vol. E95-B  No. 10  pp. 3096-3099
Type of Manuscript:  Special Section LETTER (Special Section on Medical Information Communication Technology for Disaster Recovery and Human Health Care Support)
Category: 
Keyword: 
synchronizationcooperative communicationsWBAN
 Summary | Full Text:PDF(376.6KB)

A Two-Stage TOA Estimation Scheme for OFDM-Based WLAN Systems in Indoor Environments
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2350-2352
Type of Manuscript:  Special Section LETTER (Special Section on Smart Multimedia & Communication Systems)
Category: Communication Theory and Signals
Keyword: 
two-stage estimationTOAOFDMWLAN
 Summary | Full Text:PDF(101.9KB)

A Relay Selection Based on Eigenvalue Decomposition for Cooperative Communications in Indoor Ubiquitous Sensor Networks
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/11/01
Vol. E93-B  No. 11  pp. 2967-2970
Type of Manuscript:  Special Section LETTER (Special Section on Fundamental Issues on Deployment of Ubiquitous Sensor Networks)
Category: 
Keyword: 
relay selectioneigenvalue decompositionubiquitous sensor networksindoor environments
 Summary | Full Text:PDF(181.2KB)

An Efficient AOA Estimation Scheme Based on Cyclic Pilot Symbols for Positioning of Mobile Objects in Indoor Environments
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/03/01
Vol. E91-B  No. 3  pp. 943-946
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
AOAestimationcyclic pilot symbols
 Summary | Full Text:PDF(134.3KB)

A Novel Preamble for Frequency-Offset Estimation in OFDM-Based WLAN Systems
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/06/01
Vol. E90-B  No. 6  pp. 1547-1550
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
frequency-offsetpreambleOFDMWLAN
 Summary | Full Text:PDF(163.6KB)

Frequency Synchronization Using Two-Stage Diversity in OFDM-Based WLAN Systems
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/06/01
Vol. E89-B  No. 6  pp. 1918-1921
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
synchronizationdiversityOFDMWLAN
 Summary | Full Text:PDF(152.5KB)

A High-Resolution Frequency-Offset Estimator for OFDM-Based WLAN Systems
Sekchin CHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/12/01
Vol. E88-B  No. 12  pp. 4655-4658
Type of Manuscript:  LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
frequency-offsetestimationOFDMWLAN
 Summary | Full Text:PDF(307.8KB)