Kenichi TAKIZAWA


Detection Capability of Downlink Signals in Mobile WiMAX and 3GPP LTE with an FFT-Based UWB Receiver
Kenichi TAKIZAWA Hirotaka YAMANE Huan-Bang LI Feng LU Kohei OHNO Takuji MOCHIZUKI Takashi OKADA Kunio YATA Hisashi NISHIKAWA Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1  pp. 285-292
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: 
Keyword: 
ultra wideband (UWB)coexistencedetect-and-avoid (DAA)mobile WiMAX3GPP LTE
 Summary | Full Text:PDF(2.8MB)

Examination of Effective UWB Avoidance Based on Experiments for Coexistence with Other Wireless Systems
Huan-Bang LI Kunio YATA Kenichi TAKIZAWA Noriaki MIYAZAKI Takashi OKADA Kohei OHNO Takuji MOCHIZUKI Eishin NAKAGAWA Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1  pp. 274-284
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: 
Keyword: 
UWBinterference avoidancesubcarrier nullificationnotchclearance spacing
 Summary | Full Text:PDF(4.4MB)

Optimum Threshold for Indoor UWB ToA-Based Ranging
Marzieh DASHTI Mir GHORAISHI Katsuyuki HANEDA Jun-ichi TAKADA Kenichi TAKIZAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/10/01
Vol. E94-A  No. 10  pp. 2002-2012
Type of Manuscript:  PAPER
Category: Spread Spectrum Technologies and Applications
Keyword: 
rangingpositioningultra-wide-bandtime-of-arrival estimationdetection
 Summary | Full Text:PDF(1.2MB)

Performance Evaluation of Wireless Communications for Capsule Endoscopy
Kenichi TAKIZAWA Takahiro AOYAGI Kiyoshi HAMAGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/09/01
Vol. E94-B  No. 9  pp. 2488-2491
Type of Manuscript:  Special Section LETTER (Special Section on Information Communication Technology for Highly Reliable Human Health Care Services)
Category: 
Keyword: 
body area networkscapsule endoscopyreceived signal strength
 Summary | Full Text:PDF(463.6KB)

Development of an Implantable WBAN Path-Loss Model for Capsule Endoscopy
Takahiro AOYAGI Kenichi TAKIZAWA Takehiko KOBAYASHI Jun-ichi TAKADA Kiyoshi HAMAGUCHI Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/04/01
Vol. E93-B  No. 4  pp. 846-849
Type of Manuscript:  Special Section LETTER (Special Section on Information and Communication Technology for Wellness and Medical Applications)
Category: 
Keyword: 
wireless body area network (WBAN)implantable WBANcapsule endoscopypath loss model
 Summary | Full Text:PDF(220.9KB)

Novel Joint Source-Channel Coding of Periodic ECG Signals for Reliable Wireless Patient Monitoring
Katsuhiro WATANABE Kenichi TAKIZAWA Tetsushi IKEGAMI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/04/01
Vol. E93-B  No. 4  pp. 819-825
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication Technology for Wellness and Medical Applications)
Category: 
Keyword: 
channel codingECG (electrocardiogram)side informationcorrelation
 Summary | Full Text:PDF(1.7MB)

Channel Model on Various Frequency Bands for Wearable Body Area Network
Norihiko KATAYAMA Kenichi TAKIZAWA Takahiro AOYAGI Jun-ichi TAKADA Huan-Bang LI Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/02/01
Vol. E92-B  No. 2  pp. 418-424
Type of Manuscript:  Special Section PAPER (Special Section on Medical Information and Communications Technologies)
Category: 
Keyword: 
body area network (BAN)wearable BAN channel modelpath loss model
 Summary | Full Text:PDF(1.3MB)

A Study on Possibility of Detecting IEEE802.15.4a Signals for Spectrum Sharing
Makoto HASEGAWA Tetsushi IKEGAMI Kenichi TAKIZAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/11/01
Vol. E91-A  No. 11  pp. 3201-3205
Type of Manuscript:  Special Section LETTER (Special Section on Wideband Systems)
Category: 
Keyword: 
UWBIEEE802.15.4asignal detection
 Summary | Full Text:PDF(803.1KB)

Low-Complexity Viterbi Equalizer for MBOK DS-UWB Systems
Kenichi TAKIZAWA Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/09/01
Vol. E88-A  No. 9  pp. 2350-2355
Type of Manuscript:  Special Section PAPER (Special Section on Ultra Wideband Systems)
Category: Coding
Keyword: 
ultra wideband (UWB)M-ary biorthogonal keying (MBOK)equalizationdelayed decision-feedback sequence estimation (DDFSE)
 Summary | Full Text:PDF(432.8KB)

Combined Iterative Demapping and Decoding for Coded MBOK DS-UWB Systems
Kenichi TAKIZAWA Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2621-2629
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
ultra widebanditerative decodingM-ary biorthogonal keying(MBOK)multipath fading channels
 Summary | Full Text:PDF(501.8KB)