Ikuo OKA


A 250 Msps, 0.5 W eDRAM-Based Search Engine Dedicated Low Power FIB Application
Hisashi IWAMOTO Yuji YANO Yasuto KURODA Koji YAMAMOTO Kazunari INOUE Ikuo OKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/08/01
Vol. E96-C  No. 8  pp. 1076-1082
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
routeraddress lookuppower consumptionsearch engineTCAMlow power
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FPS-RAM: Fast Prefix Search RAM-Based Hardware for Forwarding Engine
Kazuya ZAITSU Koji YAMAMOTO Yasuto KURODA Kazunari INOUE Shingo ATA Ikuo OKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/07/01
Vol. E95-B  No. 7  pp. 2306-2314
Type of Manuscript:  PAPER
Category: Network System
Keyword: 
IP routeraddress lookupternary content addressable memory (TCAM)power consumptionfield programmable gate array (FPGA)circuit design
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Basis Vector Estimation Analysis for Identification of Block Orthogonal Modulations
Takafumi KINUGASA Ikuo OKA Shingo ATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/05/01
Vol. E95-B  No. 5  pp. 1882-1885
Type of Manuscript:  LETTER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
modulation identificationblock orthogonal modulationsymbol error probabilitymultidimensional rotation
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Estimating Environment-Independent Parameters on Basis of Comparative Assessment of User's Subjectivity
Yasuhiro SATO Shin'ichiro KITANO Shingo ATA Ikuo OKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/08/01
Vol. E94-B  No. 8  pp. 2265-2273
Type of Manuscript:  PAPER
Category: Network
Keyword: 
subjective assessmentcomparative evaluationquality of servicebulk transmission
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Error Probability Analysis of Majority Decision in Tree Network Composed of BSC
Kazutaka NISHINO Shinji TANI Ikuo OKA Shingo ATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/02/01
Vol. E94-B  No. 2  pp. 562-564
Type of Manuscript:  LETTER
Category: Network
Keyword: 
wireless sensor networkpath diversitybinary tree networkbinary symmetric channel
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FOREWORD
Ikuo OKA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 1867-1867
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
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Inferring Network Impact Factors: Applying Mixed Distribution to Measured RTTs
Yasuhiro SATO Shingo ATA Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/04/01
Vol. E92-B  No. 4  pp. 1233-1243
Type of Manuscript:  PAPER
Category: Network
Keyword: 
delay characteristicsround trip time (RTT)mixed distributionnetwork behavior
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Effective Bit Selection Methods for Improving Performance of Packet Classifications on IP Routers
Gang QIN Shingo ATA Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/05/01
Vol. E90-B  No. 5  pp. 1090-1097
Type of Manuscript:  PAPER
Category: Switching for Communications
Keyword: 
patricia triecontent addressable memoryquality of servicebackbone routeredge router
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Cutoff Rate of m-ary PPM in APD Based Free Space Optical Channels
Ikuo OKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/08/01
Vol. E87-B  No. 8  pp. 2173-2175
Type of Manuscript:  Special Section LETTER (Special Section on Recent Fundamental Technologies for Broadband Satellite Communications)
Category: 
Keyword: 
optical m-ary PPMcutoff rateAPDturbulencetiming jitter
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A Practical Approach for Coded OFDM with Partial Transmit Sequence
Tomoyuki MANDAI Ikuo OKA Marc P.C. FOSSORIER Shingo ATA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/05/01
Vol. E87-B  No. 5  pp. 1273-1275
Type of Manuscript:  Special Section LETTER (Special Section on Mobile Multimedia Communications)
Category: 
Keyword: 
coded OFDMPTSpeak power reductionside informationrotationally invariant TCM
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An Application of Separate Coding to Space-Time Turbo-Coded Modulation
Kohsuke HARADA Shingo ATA Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 380-383
Type of Manuscript:  Special Section LETTER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
Category: 
Keyword: 
space-time codingturbo-coded modulationRayleigh fading channel
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Exact Analysis of Bit Error Probability for 4-State Soft Decision Viterbi Decoding
Hideki YOSHIKAWA Ikuo OKA Chikato FUJIWARA Yoshimasa DAIDO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/10/01
Vol. E85-A  No. 10  pp. 2263-2266
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
exact analysisbit error probabilitysoft decision Viterbi decoding
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Code Synchronization Error Control Scheme by Correlation of Received Sequence in Phase Rotating Modulation
Hideki YOSHIKAWA Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/08/25
Vol. E83-B  No. 8  pp. 1873-1879
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
code synchronization errorsymbol deletion/insertionphase rotating modulationcorrelation
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A Proposal of Simultaneous Spread of PPM in Frequency and Time Axes for Adaptive CDMA
Jinsong DUAN Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 2126-2135
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
spread spectrumspread timePPMCDMAdiscrete Fourier transformcapacity
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Symbol Error Probability of Time Spread PPM Signals in the Presence of Co-channel Interference
Jinsong DUAN Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/01/25
Vol. E81-B  No. 1  pp. 66-72
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
time spread PPMCDMAmomentsmaximum entropy methodsymbol error probability
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FOREWORD
Shozo KOMAKI Iwao SASASE Nobuo NAKAJIMA Makoto NAKAMURA Makoto MIYAKE Susumu YOSHIDA Ikuo OKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/08/25
Vol. E80-B  No. 8  pp. 1109-1110
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
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Error Probability of ALOHA Systems with Controlled Output Power
Mitsuyuki KISHIMOTO Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/07/25
Vol. E78-A  No. 7  pp. 805-811
Type of Manuscript:  Special Section PAPER (Special Section on Mobile Information Network)
Category: 
Keyword: 
ALOHAcontrolled output powererror probabilityPSKpower level distributionoptimal power level
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Error Probability Analysis in Reduced State Viterbi Decoding
Carlos VALDEZ Hiroyuki FUJIWARA Ikuo OKA Hirosuke YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/06/25
Vol. E76-B  No. 6  pp. 667-676
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
reduced state decodingviterbi algorithmfeedback equalizationintersymbol interferencetrellis coded modulation
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Error Probability of Convolutional Coding in Stretched Pulse OOK Optical Channels
Hiroyuki FUJIWARA Juro UENO Hiromasa KUDO Ikuo OKA Ichiro ENDO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/02/25
Vol. E76-B  No. 2  pp. 178-186
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
Viterbi decodingstretched pulsesuper encodererror matrix methodISI-matched decoderoptical communication
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Bit Error Probability and Throughput Performance of Time Spread PPM/CDMA Systems
Xuping ZHOU Ikuo OKA Chikato FUJIWARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/12/25
Vol. E75-A  No. 12  pp. 1696-1701
Type of Manuscript:  Special Section PAPER (Special Section on Networks and Mobile Communications)
Category: 
Keyword: 
SS/CDMAtime spread PPMbit error probabilitythroughputtransmission efficiency
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Application of Moment Technique in Performance Analysis of Coded 8-PSK over Hard-Limited Satellite Channels in the Presence of Interference and Noise
Nympha JAYAMANNE Ikuo OKA Shinsaku MORI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/10/25
Vol. E72-E  No. 10  pp. 1119-1126
Type of Manuscript:  PAPER
Category: Satellite Communication
Keyword: 
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Error Probability Bounds for Trellis Coded Modulation over Sequence Dependent Channels
Ikuo OKA Ezio BIGLIERI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/04/25
Vol. E72-E  No. 4  pp. 375-383
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
 Summary | Full Text:PDF

Error Performance for Soft Decision Viterbi Decoding Over OOK Optical Space Links
Ikuo OKA Ichiro ENDO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/09/25
Vol. E69-E  No. 9  pp. 932-939
Type of Manuscript:  PAPER
Category: Communication Systems and Communication Protocols
Keyword: 
 Summary | Full Text:PDF