Masashi IWABUCHI


Optimal Design Method of MIMO Antenna Directivities and Corresponding Current Distributions by Using Spherical Mode Expansion
Maki ARAI Masashi IWABUCHI Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   
Publication Date: 2017/10/01
Vol. E100-B  No. 10  pp. 1891-1903
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMOantenna directivityantenna structurecurrent distributionspherical mode expansioncapacity maximization
 Summary | Full Text:PDF(2.3MB)

Frame Collision Reduction Method Employing Adaptive Transmission Control for IEEE802.11 Wireless LAN System
Akira KISHIDA Masashi IWABUCHI Toshiyuki SHINTAKU Takeshi ONIZAWA Tetsu SAKATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/09/01
Vol. E97-B  No. 9  pp. 1790-1799
Type of Manuscript:  Special Section PAPER (Special Section on Ambient Intelligence and Sensor Networks)
Category: 
Keyword: 
CSMA/CAIEEE802.11collision reductiondenseIFS
 Summary | Full Text:PDF(2.5MB)

A New Simple Packet Combining Scheme Employing Maximum Likelihood Detection for MIMO-OFDM Transmission in Relay Channels
Takeshi ONIZAWA Hiroki SHIBAYAMA Masashi IWABUCHI Akira KISHIDA Makoto UMEUCHI Tetsu SAKATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/05/01
Vol. E97-B  No. 5  pp. 1094-1102
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
relay channeldecode-and-forwardpacket combiningcyclic shift delayMIMO-OFDMMLD
 Summary | Full Text:PDF(4.1MB)

User-Oriented QoS Control Method Based on CSMA/CA for IEEE802.11 Wireless LAN System
Akira KISHIDA Masashi IWABUCHI Toshiyuki SHINTAKU Tetsu SAKATA Takefumi HIRAGURI Kentaro NISHIMORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/02/01
Vol. E96-B  No. 2  pp. 419-429
Type of Manuscript:  Special Section PAPER (Special Section on Quality of Communication Services Improving Quality of Life)
Category: 
Keyword: 
user-orientedQoSfixed backoffCSMA/CAIEEE802.11
 Summary | Full Text:PDF(3.1MB)