Ren SAKATA

Dynamic Pilot Channel Transmission with Adaptive Receive Filter Configuration for Cognitive Radio System
Ren SAKATA Tazuko TOMIOKA Takahiro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1256-1265
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
cognitive pilot signal, differential code parallel transmission, adaptive equalizer, 
 Summary | Full Text:PDF(1.4MB)
Software Defined Modem for Cognitive Radio with Dynamically Reconfigurable Processor
Ren SAKATA Daisuke TAKEDA Noritaka DEGUCHI Tatsuma HIRANO Takashi YOSHIKAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/03/01
Vol. E95-B  No. 3  pp. 810-818
Type of Manuscript:  PAPER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
software defined radio, reconfigurable processor, 3GPP long term evolution, 
 Summary | Full Text:PDF(1.3MB)
Performance Analysis of Control Signal Transmission Technique for Cognitive Radios in Dynamic Spectrum Access Networks
Ren SAKATA Tazuko TOMIOKA Takahiro KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3597-3605
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Access)
Category: Spectrum Allocation
Keyword: 
cognitive radio, dynamic spectrum access, control signal, differential code parallel transmission, 
 Summary | Full Text:PDF(821.8KB)
Proposal of an A/D Converter Clipping Noise Suppression Technique for High-Sensitivity Carrier-Sensing of Cognitive Radio Transceiver
Tazuko TOMIOKA Ren SAKATA Tomoya HORIGUCHI Takeshi TOMIZAWA Kaoru INOUE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Vol. E91-B  No. 1  pp. 119-126
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Spectrum Sharing Technology)
Category: Enabling Technology
Keyword: 
cognitive radio, carrier-sensing, analogue-to-digital converter, clipping, interpolation, 
 Summary | Full Text:PDF(909.4KB)