Tomoaki KUMAGAI


Indoor Experimental Evaluation of the QoE-Oriented Wireless LAN with Dynamic Network Reconfiguration
Kazuto YANO Mariko SEKIGUCHI Tomohiro MIYASAKA Takashi YAMAMOTO Hirotsugu YAMAMOTO Yoshizo TANAKA Yoji OKADA Masayuki ARIYOSHI Tomoaki KUMAGAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/02/01
Vol. E99-B  No. 2  pp. 507-522
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
QoE satisfactionadmission controlnetwork reconfigurationthroughput predictionwireless LANindoor experiment
 Summary | Full Text:PDF(4.4MB)

A New Multi-Channel Mesh Architecture with DCF-Based Inter-AP Communication and Radio-Aware Packet Forwarding for IEEE 802.11-Compliant WLANs
Luis LOYOLA Tomoaki KUMAGAI Kengo NAGATA Shinya OTSUKI Satoru AIKAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/01/01
Vol. E90-B  No. 1  pp. 78-91
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
multihop networksmesh networksIEEE 802.11 wireless LAN
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An Effective Data Transfer Method for IEEE 802.11 Wireless LANs
Kazuyoshi SAITOH Yasuhiko INOUE Tomoaki KUMAGAI Masataka IIZUKA Satoru AIKAWA Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/03/01
Vol. E88-B  No. 3  pp. 1266-1270
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
CSMA/CAmultirate controlpriority controlslot time
 Summary | Full Text:PDF(1.5MB)

A Hybrid On-Demand Content Delivery Scheme Employing Modified Pyramid Broadcasting
Tomoaki KUMAGAI Hiroshi SAITO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/04/01
Vol. E86-B  No. 4  pp. 1399-1411
Type of Manuscript:  PAPER
Category: Media Compound Methods
Keyword: 
on-demandpyramid broadcastinghybridcontent deliveryforward error correction
 Summary | Full Text:PDF(1.9MB)

A New Space Diversity Reception Scheme for Packet-Based OFDM Wireless Access Systems
Satoru HORI Tomoaki KUMAGAI Masato MIZOGUCHI Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/06/01
Vol. E85-B  No. 6  pp. 1083-1093
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
OFDMspace diversityphase trackingcarrier frequency synchronization
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A New Vector Error Measurement Scheme for Transmit Modulation Accuracy of OFDM Systems
Satoru HORI Tomoaki KUMAGAI Tetsu SAKATA Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 1906-1913
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
OFDMinter-operabilitytransmit modulation accuracyvector errorpilot signal
 Summary | Full Text:PDF(554.9KB)

A Maximal Ratio Combining Frequency Diversity ARQ Scheme for High-Speed OFDM Systems
Tomoaki KUMAGAI Tetsu SAKATA Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 1914-1922
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
ARQpacket combiningOFDMfrequency diversitymaximal ratio combining
 Summary | Full Text:PDF(394.1KB)

High Capacity and Wide Coverage Cell Station for Personal Communication Systems
Kiyoshi KOBAYASHI Tomoaki KUMAGAI Shuji KUBOTA Shigeaki OGOSE Takeshi HATTORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/01/25
Vol. E82-B  No. 1  pp. 112-119
Type of Manuscript:  PAPER
Category: Communication Systems and Transmission Equipment
Keyword: 
personal communicationcell stationdiversitycoherent detectionburst-by-burst AFC
 Summary | Full Text:PDF(466.4KB)

Bit Significance Selective Frequency Diversity Transmission
Tomoaki KUMAGAI Kiyoshi KOBAYASHI Katsuhiko KAWAZOE Shuji KUBOTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/03/25
Vol. E81-B  No. 3  pp. 545-552
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
frequency diversityspectrum efficiencyfadingADPCM
 Summary | Full Text:PDF(693.6KB)

A Group Demodulator Employing Multi-Symbol Chirp Fourier Transform
Kiyoshi KOBAYASHI Tomoaki KUMAGAI Shuzo KATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/07/25
Vol. E77-B  No. 7  pp. 905-910
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
communication terminal and equipmentgroup demodulatorFDM-TDM conversionchirp Fourier transformpersonal communication
 Summary | Full Text:PDF(417.5KB)