Wataru YAMADA


Frequency Dependency of Path Loss Between Different Floors in An Indoor Office Environment at UHF and SHF Bands
Motoharu SASAKI Minoru INOMATA Wataru YAMADA Naoki KITA Takeshi ONIZAWA Masashi NAKATSUGAWA Koshiro KITAO Tetsuro IMAI 
Publication:   
Publication Date: 2018/02/01
Vol. E101-B  No. 2  pp. 373-382
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2016)
Category: Propagation
Keyword: 
propagation5Gmillimeter waveUHFSHFhigh frequency bandsindoor officefloor penetration loss
 Summary | Full Text:PDF(8.2MB)

Path Loss Model for Outdoor-to-Indoor Corridor Up to 40GHz Band in Microcell Environments
Minoru INOMATA Motoharu SASAKI Wataru YAMADA Takeshi ONIZAWA Masashi NAKATSUGAWA Nobutaka OMAKI Koshiro KITAO Tetsuro IMAI Yukihiko OKUMURA 
Publication:   
Publication Date: 2017/02/01
Vol. E100-B  No. 2  pp. 242-251
Type of Manuscript:  Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Realization of Next Generation Wireless Systems)
Category: 
Keyword: 
propagation5Goutdoor-to-indoor path loss modelmillimeter wavehigh frequency bandsmicrocell environments
 Summary | Full Text:PDF(2.7MB)

Path Loss Variation Characteristics at 26GHz Band in Street Microcell Environment
Motoharu SASAKI Wataru YAMADA Takatoshi SUGIYAMA Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/05/01
Vol. E98-B  No. 5  pp. 783-789
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Radio Propagation)
Category: 
Keyword: 
propagationmillimeter wavestreet micro-cellfading
 Summary | Full Text:PDF(2MB)

Path Loss Model for Low Antenna Heights in Residential Areas at Middle VHF Band
Motoharu SASAKI Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2093-2101
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
path loss modellow antenna heightmobile terminalresidential areaVHF band
 Summary | Full Text:PDF(7.4MB)

Path Loss Model with Low Antenna Height for Microwave Bands in Residential Areas
Motoharu SASAKI Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/07/01
Vol. E96-B  No. 7  pp. 1930-1944
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
path loss modellow antenna heightmobile terminalresidential areamicrowave band
 Summary | Full Text:PDF(3.3MB)

Plane-Wave and Vector-Rotation Approximation Technique for Reducing Computational Complexity to Simulate MIMO Propagation Channel Using Ray-Tracing
Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3850-3860
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO propagation channel prediction techniqueray-tracing methodimaging algorithmsubstitution technique
 Summary | Full Text:PDF(1.6MB)

New Method for Evaluating Height Gain at Subscriber Station for Wireless Access Systems in Microwave Band
Naoki KITA Wataru YAMADA Akio SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2903-2914
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
height gainpath lossmicrowave bandBWAgeometrical optics
 Summary | Full Text:PDF(3.7MB)

Wideband Characteristics of Demmel Condition Number for 22 MIMO-OFDM Channels
Naoki KITA Wataru YAMADA Akio SATO Shuta UWANO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/05/01
Vol. E87-B  No. 5  pp. 1270-1272
Type of Manuscript:  Special Section LETTER (Special Section on Mobile Multimedia Communications)
Category: 
Keyword: 
MIMO-OFDM channelDemmel condition numberindoor MIMO channelspatial multiplexing
 Summary | Full Text:PDF(283.9KB)