Hiroshi OCHI


Joint Transmission and Coding Scheme for High-Resolution Video Streams over Multiuser MIMO-OFDM Systems
Koji TASHIRO Leonardo LANANTE Masayuki KUROSAKI Hiroshi OCHI 
Publication:   
Publication Date: 2017/11/01
Vol. E100-A  No. 11  pp. 2304-2313
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Communication Systems
Keyword: 
multiuser MIMOE-SDMscalable video codingjoint source-channel codingunequal power allocationunequal error protection
 Summary | Full Text:PDF(2.8MB)

Multi-User MIMO Channel Emulator with Automatic Channel Sounding Feedback
Tran Thi Thao NGUYEN Leonardo LANANTE Yuhei NAGAO Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/11/01
Vol. E99-A  No. 11  pp. 1918-1927
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: VLSI Design Technology and CAD
Keyword: 
MIMO channel emulatorFPGA implementationchannel state informationIEEE 802.11n/acfrequency selective fading
 Summary | Full Text:PDF(4.2MB)

Two-Way Cognitive DF Relaying in WSNs with Practical RF Energy Harvesting Node
Dang Khoa NGUYEN Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/03/01
Vol. E99-B  No. 3  pp. 675-684
Type of Manuscript:  PAPER
Category: Network
Keyword: 
two-way relayrelay networkscognitive radiodecode-and-forwardenergy harvestinghardware impairments
 Summary | Full Text:PDF(3.8MB)

Hardware Design of Multi Gbps RC4 Stream Cipher
Thi Hong TRAN Leonardo LANANTE, Jr. Yuhei NAGAO Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/11/01
Vol. E96-A  No. 11  pp. 2120-2127
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: VLSI Design Technology and CAD
Keyword: 
RC4encryptionWEPWPAIEEE 802.11ac
 Summary | Full Text:PDF(1.5MB)

Novel THP Scheme with Minimum Noise Enhancement for Multi-User MIMO Systems
Shogo FUJITA Leonardo LANANTE Jr. Yuhei NAGAO Masayuki KUROSAKI Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/06/01
Vol. E96-A  No. 6  pp. 1340-1347
Type of Manuscript:  Special Section PAPER (Special Section on Circuit, System, and Computer Technologies)
Category: 
Keyword: 
multi-user MIMOnon-linear precodingTomlinson Harashima precodingvector perturbation
 Summary | Full Text:PDF(1.4MB)

RTL Design of High-Speed Sorted QR Decomposition for MIMO Decoder
Yuya MIYAOKA Yuhei NAGAO Masayuki KUROSAKI Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/11/01
Vol. E95-A  No. 11  pp. 1991-1997
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Communication Theory and Signals
Keyword: 
MIMOQRDsorted QRDRTL design
 Summary | Full Text:PDF(1.5MB)

Low Complexity Compensation of Frequency Dependent I/Q Imbalance and Carrier Frequency Offset for Direct Conversion Receivers
Leonardo LANANTE, Jr. Masayuki KUROSAKI Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/02/01
Vol. E95-B  No. 2  pp. 484-492
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
carrier frequency offsetI/Q imbalanceRTL design
 Summary | Full Text:PDF(857.6KB)

A CUDA Implementation of DWT for JPEG 2000 Codec
Masayuki KUROSAKI Masateru MATSUO Yoshimitsu KUROKI Yuhei NAGAO Baiko SAI Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2358-2360
Type of Manuscript:  Special Section LETTER (Special Section on Smart Multimedia & Communication Systems)
Category: Image Processing
Keyword: 
CUDA4K digital cinemaJPEG 2000
 Summary | Full Text:PDF(388.4KB)

A Proposition of 600 Mbps WLAN-Like System with Low-Complexity MIMO Decoder for FPGA Implementation
Wahyul Amien SYAFEI Yuhei NAGAO Ryuta IMASHIOYA Masayuki KUROSAKI Baiko SAI Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/02/01
Vol. E94-B  No. 2  pp. 491-498
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
FPGAGLSThigh throughputMIMORTL designWLAN
 Summary | Full Text:PDF(2.2MB)

A Fast Architecture Exploration Method for High Throughput IEEE 802.11e MAC Implementation Using SystemC
Sung-Rok YOON Min Li HUANG Sangho SEO Hiroshi OCHI Sin-Chong PARK 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2833-2836
Type of Manuscript:  LETTER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
SystemCtransaction level modelingIEEE 802.11 MAC
 Summary | Full Text:PDF(526.6KB)

A High Throughput Medium Access Control Implementation Based on IEEE 802.11e Standard
Min Li HUANG Jin LEE Hendra SETIAWAN Hiroshi OCHI Sin-Chong PARK 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/04/01
Vol. E93-B  No. 4  pp. 948-960
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
IEEE 802.11eMACEDCAFPGA
 Summary | Full Text:PDF(1.8MB)

A Study on Channel Estimation Using Two-Dimensional Interpolation Filters for Mobile Digital Terrestrial Television Broadcasting
Yusuke SAKAGUCHI Yuhei NAGAO Masayuki KUROSAKI Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 1150-1154
Type of Manuscript:  Special Section LETTER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
digital terrestrial television broadcastingchannel estimationscattered pilottwo dimensional filter
 Summary | Full Text:PDF(953.9KB)

New Simultaneous Timing and Frequency Synchronization Utilizing Matched Filters for OFDM Systems
Shigenori KINJO Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/08/01
Vol. E90-A  No. 8  pp. 1601-1610
Type of Manuscript:  Special Section PAPER (Special Section on Papers Selected from the 21st Symposium on Signal Processing)
Category: 
Keyword: 
OFDMframe synchronizationfrequency synchronizationcarrier frequency offsetmatched filters
 Summary | Full Text:PDF(401.1KB)

Blind Adaptive Equalizer Based on CMA and LMS Algorithm
James OKELLO Kenji UEDA Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/04/01
Vol. E87-B  No. 4  pp. 1012-1015
Type of Manuscript:  LETTER
Category: Fundamental Theories
Keyword: 
equalizerblind algorithmCMALMS
 Summary | Full Text:PDF(325.4KB)

A High Throughput Pipelined Architecture for Blind Adaptive Equalizer with Minimum Latency
Masashi MIZUNO James OKELLO Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/08/01
Vol. E86-A  No. 8  pp. 2011-2019
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
blind equalizerCMAcritical pathpipelined architecture
 Summary | Full Text:PDF(2.8MB)

A Gradient Type Algorithm for Blind System Identification and Equalizer Based on Second Order Statistics
Yoshito HIGA Hiroshi OCHI Shigenori KINJO Hirohisa YAMAGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/08/25
Vol. E82-A  No. 8  pp. 1544-1551
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
adaptive signal processingblind system identificationblind equalizationsingle input multiple output model
 Summary | Full Text:PDF(832.9KB)

Progressive Transmission of Continuous Tone Images Using Multi-Level Error Diffusion Method
Tohru MORITA Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/01/25
Vol. E82-B  No. 1  pp. 103-111
Type of Manuscript:  PAPER
Category: Source Encoding
Keyword: 
error diffusion methodgray-scale imagemulti-level imagelossless codingprogressive decodingprogressive transmission
 Summary | Full Text:PDF(1.1MB)

A New Two-Dimensional Parallel Block Adaptive Filter with Reduced Computational Complexity
Shigenori KINJO Masafumi OSHIRO Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/06/25
Vol. E81-A  No. 6  pp. 1008-1012
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from ITC-CSCC'97)
Category: Digital Signal Processing
Keyword: 
two-dimensional adaptive filterDFT filter bankreduced computational complexity
 Summary | Full Text:PDF(428.4KB)

A Subband Adaptive Filter with the Optimum Analysis Filter Bank
Hiroshi OCHI Yoshito HIGA Shigenori KINJO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/11/25
Vol. E78-A  No. 11  pp. 1566-1570
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
adaptive filtersubband adaptive filtermultirate signal processingfilter bank
 Summary | Full Text:PDF(373.9KB)

A New Robust Block Adaptive Filter for Colored Signal Input
Shigenori KINJO Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/03/25
Vol. E78-A  No. 3  pp. 437-439
Type of Manuscript:  LETTER
Category: Digital Signal Processing
Keyword: 
block adaptive filterleast square algorithmnoise cancellationsystem identificationadditive noise
 Summary | Full Text:PDF(185.2KB)

A New Cost Function for System Identification Utilizing an Alias Free Parallel Adaptive Filter
Shigenori KINJO Yoji YAMADA Hiroshi OCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/09/25
Vol. E77-A  No. 9  pp. 1426-1431
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from the 8th Digital Signal Processing Symposium)
Category: Adaptive Digital Filters
Keyword: 
system identificationsubbandadaptive filterFSF bank
 Summary | Full Text:PDF(399.9KB)

System Identification Utilizing the Circular-Based Frequency-Domain Adaptive Filter
Shigenori KINJO Hiroshi OCHI Yoshitatsu TAKARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/09/25
Vol. E75-A  No. 9  pp. 1170-1173
Type of Manuscript:  LETTER
Category: Digital Signal Processing
Keyword: 
digital signal processingfrequency-domain adaptive filterscircular convolutionsystem identification
 Summary | Full Text:PDF(178.1KB)

A Fast Convergence FIR Adaptive Filter Based on the Conjugate Gradient Method
Shigenori KINJYO Hiroshi OCHI Seiki KYAN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/11/25
Vol. E74-A  No. 11  pp. 3534-3540
Type of Manuscript:  Special Section PAPER (Special Issue on HAKONE Digital Signal Processing Symposium)
Category: 
Keyword: 
 Summary | Full Text:PDF(442.6KB)

A New IIR Adaptive Equalizer and Its Application to TV Ghost Canceller
Hiroshi OCHI Shigenori KINJYO Noriyoshi KAMBAYASHI Seiki KYAN 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/12/25
Vol. E71-E  No. 12  pp. 1253-1256
Type of Manuscript:  LETTER
Category: Systems and Control
Keyword: 
 Summary | Full Text:PDF(212.6KB)