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IEICE Trans

Hiroyasu ISHIKAWA

Maximum Positioning Error Estimation Method for Detecting User Positions with Unmanned Aerial Vehicle based on Doppler Shifts
Hiroyasu ISHIKAWA Yuki HORIKAWA Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2020/10/01
Vol. E103-B  No. 10  pp. 1069-1077
Type of Manuscript:  Special Section PAPER (Special Section on New Era of Satellite Communication/Broadcasting/Application Technologies)
Category: 
Keyword: 
unmanned aerial vehicle, Doppler shift, positioning accuracy index, maximum positioning error estimation method, curving flight model, 
 Summary | Full Text:PDF
Proposal of Instantaneous Power-Line Frequency Synchronized Superimposed Chart for Communications Quality Evaluation of broadband PLC System
Kenji KITA Hiroshi GOTOH Hiroyasu ISHIKAWA Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2020/01/01
Vol. E103-B  No. 1  pp. 60-70
Type of Manuscript:  PAPER
Category: Network
Keyword: 
PLC, packet capture analysis, visualization, communication quality evaluation, 
 Summary | Full Text:PDF
Method for Detecting User Positions with Unmanned Aerial Vehicles Based on Doppler Shifts
Hiroyasu ISHIKAWA Hiroki ONUKI Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2019/01/01
Vol. E102-A  No. 1  pp. 195-204
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: 
Keyword: 
unmanned aerial vehicles, Doppler shift, position-detection accuracy, least-squares method, positioning accuracy index, 
 Summary | Full Text:PDF
Multiple Symbol Differential Detection with Majority Decision Method for DQPSK in LOS Channel
Hiroyasu ISHIKAWA Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/01/01
Vol. E96-B  No. 1  pp. 384-388
Type of Manuscript:  LETTER
Category: Satellite Communications
Keyword: 
multiple symbol differential detection, majority decision method, frequency offset compensation technique, 
 Summary | Full Text:PDF
A Delta-Sigma Modulator Using a Non-uniform Quantizer Adjusted for the Probability Density of Input Signals
Toru KITAYABU Mao HAGIWARA Hiroyasu ISHIKAWA Hiroshi SHIRAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/07/01
Vol. E95-B  No. 7  pp. 2257-2265
Type of Manuscript:  PAPER
Category: Fundamental Theories for Communications
Keyword: 
delta-sigma modulator, non-uniform quantizer, quantization noise, 
 Summary | Full Text:PDF
Small-Sized Shaped Beam Base Station Antenna with Superior Intersector Interference Reduction in High Speed Cellular Systems
Masayuki NAKANO Hiroyasu ISHIKAWA Shinichi NOMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2586-2594
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Antennas
Keyword: 
shaped beam, base station antenna, inter-sector interference, CINR, high-speed cellular systems, 
 Summary | Full Text:PDF
Evaluation of MC-CDMA with Frequency Interleaving Technique in Frequency Selective Fading Channel
Masato FURUDATE Hiroyasu ISHIKAWA Toshinori SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 443-451
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
MC-CDMA, frequency-interleaver, frequency-domain equalization, frequency selective fading channel, 
 Summary | Full Text:PDF
Experimental Results of Future Road-to-Vehicle Communications System with Handover Function
Tadayuki FUKUHARA Kenya YONEZAWA Hiroyasu ISHIKAWA Keizo SUGIYAMA Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2649-2656
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
DSRC, handover, ITS, handover processing delay, 
 Summary | Full Text:PDF
High-Quality AlGaN/GaN HEMTs on Epitaxial AlN/Sapphire Templates
Masahiro SAKAI Kenta ASANO Subramaniam ARULKUMARAN Hiroyasu ISHIKAWA Takashi EGAWA Takashi JIMBO Tomohiko SHIBATA Mitsuhiro TANAKA Osamu ODA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/10/01
Vol. E86-C  No. 10  pp. 2071-2076
Type of Manuscript:  Special Section PAPER (Special Issue on Heterostructure Microelectronics with TWHM2003)
Category: 
Keyword: 
AlGaN/GaN, HEMT, AlN, template, 
 Summary | Full Text:PDF
Low Noise and Low Distortion Performances of an AlGaN/GaN HFET
Yutaka HIROSE Yoshito IKEDA Motonori ISHII Tomohiro MURATA Kaoru INOUE Tsuyoshi TANAKA Hiroyasu ISHIKAWA Takashi EGAWA Takashi JIMBO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/10/01
Vol. E86-C  No. 10  pp. 2058-2064
Type of Manuscript:  Special Section PAPER (Special Issue on Heterostructure Microelectronics with TWHM2003)
Category: 
Keyword: 
AlGaN/GaN HFET, low noise amplifier, noise figure (NF), intermodulation distortion, 
 Summary | Full Text:PDF
Growth of 100-mm-Diameter AlGaN/GaN Heterostructures on Sapphire Substrates by MOVPE
Makoto MIYOSHI Masahiro SAKAI Hiroyasu ISHIKAWA Takashi EGAWA Takashi JIMBO Mitsuhiro TANAKA Osamu ODA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/10/01
Vol. E86-C  No. 10  pp. 2077-2081
Type of Manuscript:  Special Section PAPER (Special Issue on Heterostructure Microelectronics with TWHM2003)
Category: 
Keyword: 
AlGaN/GaN, heterostructure, MOVPE, uniformity, bowing, 
 Summary | Full Text:PDF
18 Mbit/s Carrier Frequency Offset-Spread Spectrum (CFO-SS) System Using 2.4 GHz ISM Band
Hiroyasu ISHIKAWA Naoki FUKE Keizo SUGIYAMA Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/12/01
Vol. E85-A  No. 12  pp. 2839-2846
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
CFO-SS, wireless access, high speed, 2.4 GHz ISM band, dual-polarization technique, 
 Summary | Full Text:PDF
Investigations on Strained AlGaN/GaN/Sapphire and GaInN Multi-Quantum-Well Surface LEDs Using AlGaN/GaN Bragg Reflectors
Hiroyasu ISHIKAWA Naoyuki NAKADA Masaharu NAKAJI Guang-Yuan ZHAO Takashi EGAWA Takashi JIMBO Masayoshi UMENO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2000/04/25
Vol. E83-C  No. 4  pp. 591-597
Type of Manuscript:  Special Section PAPER (Special Issue on Blue Laser Diodes and Related Devices/Technologies)
Category: 
Keyword: 
light emitting diode (LED), distributed Bragg reflector (DBR), GaN, AlGaN, GaInN, 
 Summary | Full Text:PDF
Design of Carrier Frequency Offset-Spread Spectrum (CFO-SS) System Using 2.4 GHz ISM Band
Hiroyasu ISHIKAWA Hideyuki SHINONAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2669-2676
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
wireless LAN, CFO-SS, 2.4 GHz ISM band, 
 Summary | Full Text:PDF
Carrier Frequency Offset-Spread Spectrum (CFO-SS) Method for Wireless LAN System Using 2.4 GHz ISM Band
Hiroyasu ISHIKAWA Hideyuki SHINONAGA Hideo KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/12/25
Vol. E80-A  No. 12  pp. 2366-2371
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
wireless LAN systems, spread spectrum, 2.4 GHz ISM band, carrier frequency offset, SAW matched filter, 
 Summary | Full Text:PDF
A Novel Selection Diversity Method with Decision Feedback Equalizer
Hiroyasu ISHIKAWA Hideo KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/05/25
Vol. E77-B  No. 5  pp. 566-572
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Signal Processing in Mobile Radio Communications)
Category: 
Keyword: 
decision feedback equalizer, multipath fading, selection diversity, digital land mobile communications system, 
 Summary | Full Text:PDF