Keum-Chan WHANG


22 OSIC Receiver for Hierarchical Constellation
Deok-Kyu HWANG Sooyong CHOI Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/09/01
Vol. E93-B  No. 9  pp. 2458-2461
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
OSIChierarchical constellationMIMOQR-decomposition
 Summary | Full Text:PDF(353.6KB)

A Partial IR Hybrid ARQ Scheme Using Rate-Compatible Punctured LDPC Codes in an HSDPA System
Chang-Rae JEONG Hyo-Yol PARK Kwang-Soon KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/02/01
Vol. E92-B  No. 2  pp. 604-607
Type of Manuscript:  LETTER
Category: Fundamental Theories for Communications
Keyword: 
low-density parity check codeshybrid ARQpartial IRturbo codesHSDPA
 Summary | Full Text:PDF(231.5KB)

Blind Carrier Frequency Synchronization for the Uplink of Interleaved OFDMA Systems
Jong Yoon HWANG Kwang Soon KIM Yong-Seok KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Vol. E91-B  No. 1  pp. 368-371
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDMAblind synchronizationCFO
 Summary | Full Text:PDF(183.3KB)

Joint Optimization of Power Allocation and Detection Ordering for Closed-Loop OSIC System
Deok-Kyu HWANG Seung-Hoon HWANG Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/12/01
Vol. E90-B  No. 12  pp. 3606-3611
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOV-BLASTpower allocationorderingQR decomposition
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A Novel Frequency Offset Estimation for OFDM Systems
Jong Yoon HWANG Kwang Soon KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/11/01
Vol. E89-B  No. 11  pp. 3132-3135
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
blind synchronizationfrequency offset estimationorthogonal frequency division multiplexing (OFDM)
 Summary | Full Text:PDF(166.7KB)

New Stopping Criterion of Turbo Decoding for Turbo Processing
Dong-Kyoon CHO Byeong-Gwon KANG Yong-Seo PARK Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/01/01
Vol. E87-B  No. 1  pp. 161-164
Type of Manuscript:  LETTER
Category: Fundamental Theories
Keyword: 
turbo codesstopping criteriaMIMO
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Enhanced Packet Access Scheme for IMT-2000/UMTS Random Access Channel
Young-Sam KIM Jun-Kui AHN Kyoo-Jin HAN Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/12/01
Vol. E85-B  No. 12  pp. 2946-2949
Type of Manuscript:  LETTER
Category: Wireless Communication Technology
Keyword: 
IMT-2000/UMTSRACHpacket access schemeinterference characteristics
 Summary | Full Text:PDF(204.5KB)

Performance of Parallel Interference Cancellation with Reverse-Link Synchronous Transmission Technique for DS-CDMA System in Multipath Fading Channels
Woong SUN Seung-Hoon HWANG Duk Kyung KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/08/01
Vol. E85-B  No. 8  pp. 1622-1626
Type of Manuscript:  LETTER
Category: Wireless Communication Technology
Keyword: 
reverse-link synchronous transmission techniqueparallel interference cancellationDS-CDMA
 Summary | Full Text:PDF(229KB)

A Channel Estimation Algorithm for Mobile Communication Systems in a Fading Environment
Kyoo-Jin HAN Een-Kee HONG Sang-Tae KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/03/01
Vol. E85-B  No. 3  pp. 682-685
Type of Manuscript:  LETTER
Category: Terrestrial Radio Communications
Keyword: 
maximum Doppler frequencyphase variationsBPSK modulated signals
 Summary | Full Text:PDF(654.4KB)

Throughput Analysis of 1/N-Slotted DS-CDMA Packet Radio Networks Using a Slot-Averaged SIR Model
Jun-Kui AHN Een-Kee HONG Tae-Joong KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/04/01
Vol. E84-B  No. 4  pp. 952-959
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
packet radio networknetwork throughputCDMAslotted ALOHACLSPCLSP/CC
 Summary | Full Text:PDF(274.7KB)

Performance Analysis of Mobile Satellite Noncoherent DS-CDMA Systems with Orthogonal Signals
Yong-Hoon CHO Jun-Kui AHN Een-Kee HONG Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 623-633
Type of Manuscript:  PAPER
Category: Satellite and Space Communications
Keyword: 
noncoherent DS-CDMAmobile satellite communicationsQS-DBPSKM-ary orthogonal signaling
 Summary | Full Text:PDF(357KB)

Adaptive CDMA Scheme as a Rain Fade Countermeasure in Ka-Band Geosynchronous Satellite Communications
Dong-Hee KIM Seung-Hoon HWANG Ui-Young PAK Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/12/25
Vol. E83-B  No. 12  pp. 2600-2606
Type of Manuscript:  PAPER
Category: Satellite and Space Communications
Keyword: 
Ka-bandCDMArain fadesatellite communications
 Summary | Full Text:PDF(548.8KB)

Rapid Converging Adaptive Receiver in DS-CDMA Systems
Hee-Bong PARK Seung-Hoon HWANG Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/09/25
Vol. E83-B  No. 9  pp. 2138-2140
Type of Manuscript:  LETTER
Category: Wireless Communication Technology
Keyword: 
DS-CDMA systemsadaptive receiverLMS algorithm
 Summary | Full Text:PDF(156.7KB)

Power Control and Macrodiversity as Fade Countermeasures in Satellite CDMA Transmission at Ka-Band
Seung-Hoon HWANG Dong-Hee KIM Soo-In LEE Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/11/25
Vol. E82-B  No. 11  pp. 1878-1882
Type of Manuscript:  LETTER
Category: Satellite Communication
Keyword: 
power controlmacrodiversityfade countermeasuressatellite CDMA transmissionKa-band
 Summary | Full Text:PDF(251.1KB)

Turbo Coded CDMA System with an Interference Cancellation Technique
Hyuck-Chan KWON Ki-Jun KIM Byeong-Hoon PARK Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/12/25
Vol. E81-B  No. 12  pp. 2326-2333
Type of Manuscript:  Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research)
Category: Wireless Communication Systems
Keyword: 
turbo codesinterference cancellationCDMA
 Summary | Full Text:PDF(660.6KB)

Effect of Delay Spread on Multi-Bandwidth CDMA System with Multiple Order Selection Combining
Soon-Yil KWON Een-Kee HONG Ki-Jun KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/11/25
Vol. E81-A  No. 11  pp. 2418-2425
Type of Manuscript:  PAPER
Category: Spread Spectrum Technologies and Applications
Keyword: 
multi-bandwidth CDMArake receiverselection combiningdelay spread
 Summary | Full Text:PDF(648.9KB)

The Effects of Rain Attenuation in a Quasi-Synchronous CDMA Return Link for a Ka-Band Satellite Communication System
Seung-Hoon HWANG Jae-Young AHN Tae-Joong KIM Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/07/25
Vol. E81-A  No. 7  pp. 1436-1444
Type of Manuscript:  Special Section PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network)
Category: 
Keyword: 
quasi-synchronous CDMA return linkKa-band satellite communication systemrain attenuationtransponder nonlinearity
 Summary | Full Text:PDF(736KB)

On Performance Improvements of Spread Slotted ALOHA Network with CLSP/CC
Tae-Joong KIM Ki-Jun KIM Seung-Hoon HWANG Keum-Chan WHANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/12/25
Vol. E80-A  No. 12  pp. 2493-2499
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
spread slotted ALOHACLSPCLSP/CCnetwork throughput
 Summary | Full Text:PDF(626.3KB)