Hiroyuki KAWAI


A 40-nm Resilient Cache Memory for Dynamic Variation Tolerance Delivering ×91 Failure Rate Improvement under 35% Supply Voltage Fluctuation
Yohei NAKATA Yuta KIMI Shunsuke OKUMURA Jinwook JUNG Takuya SAWADA Taku TOSHIKAWA Makoto NAGATA Hirofumi NAKANO Makoto YABUUCHI Hidehiro FUJIWARA Koji NII Hiroyuki KAWAI Hiroshi KAWAGUCHI Masahiko YOSHIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/04/01
Vol. E97-C  No. 4  pp. 332-341
Type of Manuscript:  Special Section PAPER (Special Section on Solid-State Circuit Design,---,Architecture, Circuit, Device and Design Methodology)
Category: 
Keyword: 
design for robustnesscachevariation tolerance7T/14T SRAM
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Investigation of Inter-Node B Macro Diversity for Single-Carrier Based Radio Access in Evolved UTRA Uplink
Hiroyuki KAWAI Akihito MORIMOTO Kenichi HIGUCHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/01/01
Vol. E93-B  No. 1  pp. 125-134
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
cellular systemspacket radio accessEvolved UTRAuplinkmacro diversitysoft handover
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Coverage Performance of Common/Shared Control Signals Using Transmit Diversity in Evolved UTRA Downlink
Hidekazu TAOKA Akihito MORIMOTO Hiroyuki KAWAI Kenichi HIGUCHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1589-1599
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
OFDMtransmit diversityEvolved UTRAdownlinkcontrol signal
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Adaptive Selection of Surviving Symbol Replica Candidates for Quasi-Maximum Likelihood Detection Using M-Algorithm with QR-Decomposition for OFDM MIMO Multiplexing
Kenichi HIGUCHI Hiroyuki KAWAI Hidekazu TAOKA Noriyuki MAEDA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/04/01
Vol. E92-B  No. 4  pp. 1258-1271
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDMMIMOspatial multiplexingmaximum likelihood detectionM-algorithm
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Partitions, Functions and the Arc-Coloring of Digraphs
Hiroyuki KAWAI Yukio SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/09/01
Vol. E89-A  No. 9  pp. 2381-2385
Type of Manuscript:  PAPER
Category: Graphs and Networks
Keyword: 
arc-coloringset partitionline digraph
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Likelihood Function for QRM-MLD Suitable for Soft-Decision Turbo Decoding and Its Performance for OFCDM MIMO Multiplexing in Multipath Fading Channel
Hiroyuki KAWAI Kenichi HIGUCHI Noriyuki MAEDA Mamoru SAWAHASHI Takumi ITO Yoshikazu KAKURA Akihisa USHIROKAWA Hiroyuki SEKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/01/01
Vol. E88-B  No. 1  pp. 47-57
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part 1)
Category: MIMO
Keyword: 
MIMOOFCDMQR decompositionmaximum likelihood detectionturbo coding
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Transmit Power and Window Control to Reduce Inter-User Interference in CDMA Cellular Packet Systems
Hiroyuki KAWAI Shinzo OHKUBO Toru OTSU Hirohito SUDA Yasushi YAMAO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1698-1706
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
mobile communicationscode division multiple accesspacket transmissioninterference reductiontransmit power controltransmission delay
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The Chromatic Number and the Chromatic Index of de Bruijn and Kautz Digraphs
Hiroyuki KAWAI Yukio SHIBATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/06/01
Vol. E85-A  No. 6  pp. 1352-1358
Type of Manuscript:  PAPER
Category: Graphs and Networks
Keyword: 
graph coloringde Bruijn networkKautz networkline digraph
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A Programmable Geometry Processor with Enhanced Four-Parallel SIMD Type Processing Core for PC-Based 3D Graphics
Hiroyuki KAWAI Yoshitsugu INOUE Junko KOBARA Robert STREITENBERGER Hiroaki SUZUKI Hiroyasu NEGISHI Masatoshi KAMEYAMA Kazunari INOUE Yasutaka HORIBA Kazuyasu FUJISHIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/05/01
Vol. E85-C  No. 5  pp. 1200-1210
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
3D graphicsprogrammablegeometrySIMDclip test
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Novel VLIW Code Compaction Method for a 3D Geometry Processor
Hiroaki SUZUKI Hiroyuki KAWAI Hiroshi MAKINO Yoshio MATSUDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/11/01
Vol. E84-A  No. 11  pp. 2885-2893
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
VLIWcode compactionASSP3D geometry processorcomputer graphics
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A Fast Transmit Power Control Based on Markov Transition for DS-CDMA Mobile Radio
Hirohito SUDA Hiroyuki KAWAI Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/08/25
Vol. E82-B  No. 8  pp. 1353-1362
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
fast TPCMarkov transitionDS/CDMAmobile radio
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A Highly Parallel DSP Architecture for Image Recognition
Hiroyuki KAWAI Yoshitsugu INOUE Rebert STREITENBERGER Masahiko YOSHIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/08/25
Vol. E78-A  No. 8  pp. 963-970
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
image recognitionSIMDDSParchitecture
 Summary | Full Text:PDF