Ichirou IDA


A Bisection Method-Based Controlling Scheme for Phased Array Antenna with Slow Switching Speed-Phase Shifters
Quoc Tuan TRAN Shinsuke HARA Atsushi HONDA Yuuta NAKAYA Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/05/01
Vol. E91-B  No. 5  pp. 1557-1567
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MEMSphase shifterIEEE 802.11abit-sizeone-dimension searchbisection
 Summary | Full Text:PDF(822.6KB)

Experimental Analysis and Site-Specific Modeling of Channel Parameters at Mobile Station in an Urban Macrocellular Environment
Kriangsak SIVASONDHIVAT Jun-ichi TAKADA Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/04/01
Vol. E91-B  No. 4  pp. 1132-1144
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
double directional measurementangular-delay PSD channel model
 Summary | Full Text:PDF(1022KB)

Proposal of Receive Antenna Selection Methods for MIMO-OFDM System
Quoc Tuan TRAN Shinsuke HARA Kriangsak SIVASONDHIVAT Jun-ichi TAKADA Atsushi HONDA Yuuta NAKAYA Kaoru YOKOO Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/02/01
Vol. E91-B  No. 2  pp. 505-517
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO-OFDMMMSERF switchpolarizationantenna selectionIEEE 802.11n
 Summary | Full Text:PDF(1.5MB)

An Adaptive Beamforming Method for Phased Array Antenna with MEMS Phase Shifters
Quoc Tuan TRAN Shinsuke HARA Yuuta NAKAYA Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/09/01
Vol. E89-B  No. 9  pp. 2503-2513
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MEMSphase shifterIEEE 802.11amono-resolutionmulti-resolutionprocessing delay
 Summary | Full Text:PDF(1.1MB)

Performance Evaluation for RF-Combining Diversity Antenna Configured with Variable Capacitors
Hiroya TANAKA Jun-ichi TAKADA Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/04/01
Vol. E89-C  No. 4  pp. 488-494
Type of Manuscript:  Special Section PAPER (Special Section on Advanced RF Technologies for Compact Wireless Equipment and Mobile Phones)
Category: 
Keyword: 
mobile systemsadaptive array antennasdiversity antennasvariable capacitorRF-combining diversity antennasperturbation methodsteepest gradient method
 Summary | Full Text:PDF(635.5KB)

The Efficiency-Fractional Bandwidth Product (EB) of Small Dielectric Loaded Antennas and the System EB
Ichirou IDA Takatoshi SEKIZAWA Hiroyuki YOSHIMURA Koichi ITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2498-2506
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Mobile Antennas
Keyword: 
electrically small dielectric loaded antennasefficiency-fractional bandwidth product (EB)system EBantenna impedance measurementWheeler cap method
 Summary | Full Text:PDF(830.6KB)