IEICE SEARCH SYSTEM

Akira OGAWA

FOREWORD Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/10/01 Vol. E88-A No. 10 pp. 2707-2707 Type of Manuscript: FOREWORD Category: Keyword:
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Hierarchical Transmission of DCT Coefficients Using Multi-Code DS/SS Modulation Masaru HONJO Satoshi MAKIDO Takaya YAMAZATO Hiraku OKADA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/11/01 Vol. E87-A No. 11 pp. 3001-3007 Type of Manuscript: PAPER Category: Communication Theory and Signals Keyword: DCT, multi-code SS, hierarchical transmission,
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Information and Signal Processing for Sensor Networks Akira OGAWA Takaya YAMAZATO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/10/01 Vol. E87-A No. 10 pp. 2599-2606 Type of Manuscript: Special Section PAPER (Special Section on Wide Band Systems) Category: INVITED Keyword: sensor networks, collaborative information and signal processing, joint source and channel coding, deterministic and statistic collaboration, cooperative diversity,
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Performance Improvement for Coded OFDM Systems with Adaptive Interleaving in Frequency Selective Fading Channel Masaaki HARADA Takaya YAMAZATO Hiraku OKADA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/06/01 Vol. E86-A No. 6 pp. 1541-1549 Type of Manuscript: PAPER Category: Coding Theory Keyword: OFDM, adaptive interleave, bit interleave, symbol interleave, MTCM, convolutional code, trellis diagram, frequency selective fading, Euclidean distance,
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A Study on Turbo Soft-Decision Decoding for Hard-Detected Optical Communication Signals Chen ZHENG Takaya YAMAZATO Hiraku OKADA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/03/01 Vol. E86-B No. 3 pp. 1022-1030 Type of Manuscript: PAPER Category: Fiber-Optic Transmission Keyword: turbo decoding, error-detected reliability, error-detected state, optical fiber communication,
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Soft-Decision Decoding of Low-Density Parity-Check Codes for Hard-Detected Optical Communication Signals Chen ZHENG Takaya YAMAZATO Hiraku OKADA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/03/01 Vol. E86-B No. 3 pp. 1132-1135 Type of Manuscript: LETTER Category: Fundamental Theories Keyword: low-density parity-check codes, optical fiber communication, error detection, hard-detected signal,
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Comparison of Multiple Access Schemes in Multibeam Non-GEO Satellite Communication Systems Naoki ICHIKAWA Masaaki KATAYAMA Hiraku OKADA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/02/01 Vol. E86-B No. 2 pp. 785-791 Type of Manuscript: PAPER Category: Satellite and Space Communications Keyword: multibeam satellite, multiple access, capacity, interference,
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A Symbol Synchronizer for Multi-Carrier Spread-Spectrum Systems Shigetaka GOTO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2002/12/01 Vol. E85-A No. 12 pp. 2881-2885 Type of Manuscript: Special Section LETTER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: multi-carrier spread-spectrum, symbol synchronizer, packet transmission, false-detection, miss-detection,
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BER Analysis for Multi-Carrier DS CDMA with Multi-Rate Traffic Abbas SANDOUK Masaaki HARADA Hiraku OKADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/07/01 Vol. E84-A No. 7 pp. 1723-1731 Type of Manuscript: Special Section LETTER (Special Section on Multi-dimensional Mobile Information Networks) Category: Keyword: multi-rate traffic, BER analysis, multi-carrier DS-CDMA, OFDM-CDMA,
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QoS and Capacity Comparison of CDMA ALOHA Protocols in Multimedia Networks Abbas SANDOUK Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/06/01 Vol. E84-B No. 6 pp. 1588-1595 Type of Manuscript: Special Section LETTER (Special Issue on New Developments on QoS Technologies for Information Networks) Category: Keyword: CDMA ALOHA, packet CDMA, throughput analysis, outage probability, voice and data transmission,
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Joint Multi-Dimensional Channel Parameter Estimation Schemes for DS-CDMA Systems Using a Modified Version of the SAGE Algorithm Youssef R. SENHAJI Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/03/01 Vol. E84-B No. 3 pp. 511-519 Type of Manuscript: Special Section PAPER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21^st Century) Category: Keyword: channel parameter estimation, EM algorithm, SAGE algorithm, Cramer-Rao lower bound, maximum-likelihood estimation,
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Generation of Sets of Sequences Suitable for Multicode Transmission in Quasi-Synchronous CDMA Systems Masato SAITO Takaya YAMAZATO Hiraku OKADA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/03/01 Vol. E84-B No. 3 pp. 576-580 Type of Manuscript: Special Section LETTER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21^st Century) Category: Keyword: quasi-synchronous CDMA, Gold code, orthogonal Gold code, multicode transmission,
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Throughput Performance of CDMA Slotted ALOHA Systems Based on Average Packet Success Probability Considering Bit-to-Bit Dependence Masato SAITO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/02/01 Vol. E84-A No. 2 pp. 653-659 Type of Manuscript: PAPER Category: Spread Spectrum Technologies and Applications Keyword: CDMA Slotted ALOHA, packet success probability, bit-to-bit dependence, throughput,
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An Access Control Protocol for a Heterogeneous Traffic with a Multi-Code CDMA Scheme Abbas SANDOUK Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/11/20 Vol. E83-A No. 11 pp. 2085-2092 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: access control, integrated voice and data, packet CDMA, multi-code CDMA, throughput and delay analysis,
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FOREWORD Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/11/20 Vol. E83-A No. 11 pp. 2047-2047 Type of Manuscript: FOREWORD Category: Keyword:
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An Initial Code Acquisition Scheme for Indoor Packet DS/SS Systems with Macro/Micro Antenna Diversity Youhei IKAI Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/11/20 Vol. E83-A No. 11 pp. 2070-2077 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: spread spectrum, code acquisition, indoor packet radio, spatial diversity, fading and shadowing,
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A Study on Reducing the Nonlinear Distortion in Multicarrier Systems Masaaki HARADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/10/20 Vol. E83-A No. 10 pp. 1992-1995 Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications) Category: Multicarrier System Keyword: multicarrier signal, signal point series, PMEPR, MLSD, squared distance,
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Joint Optimization of Transmitter/Receiver with Multiple Transmit/Receive Antennas in Band-Limited Channels Koichiro BAN Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2000/08/20 Vol. E83-B No. 8 pp. 1697-1704 Type of Manuscript: Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications) Category: Keyword: joint optimization, multiple antennas, bit allocation, diversity,
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Adaptive Transmit Permission Probability Control in CDMA Cellular Packet Communications with Site Diversity Kazuo MORI Takehiko KOBAYASHI Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2000/07/20 Vol. E83-B No. 7 pp. 1445-1453 Type of Manuscript: PAPER Category: Wireless Communication Technology Keyword: fairness, CDMA, packet communication, transmit permission probability, adaptive control,
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Effects of Cell Structure on Quality of Service of LEOS Communication Systems Kenichi ONO Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2000/04/20 Vol. E83-B No. 4 pp. 782-790 Type of Manuscript: PAPER Category: Satellite and Space Communications Keyword: LEOS (low earth-orbital satellite), overlap cell, overlay cell, handover, QoS (quality of service),
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Optimum Cell Boundary for Uplink and Downlink in CDMA Systems Kohji TAKEO Shinichi SATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2000/04/20 Vol. E83-B No. 4 pp. 865-868 Type of Manuscript: LETTER Category: Terrestrial Radio Communications Keyword: CDMA system, up/downlink, non-uniform traffic, cell structure,
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Chip-by-Chip Turbo Coding for DS/SS Systems Chen ZHENG Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/12/20 Vol. E82-A No. 12 pp. 2751-2757 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: Turbo-codes, chip-by-chip coding, DS/SS modulation, energy compensation,
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Service Fairness in CDMA Cellular Packet Systems with Site Diversity Reception Kazuo MORI Takehiko KOBAYASHI Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1999/12/20 Vol. E82-B No. 12 pp. 1964-1973 Type of Manuscript: Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems) Category: Keyword: service fairness, CDMA, packet communication, slotted-ALOHA, transmission power control, permission probability control,
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Uplink and Downlink Communications Qualities in CDMA Cellular Systems Considering Effects of Traffic Distribution Kohji TAKEO Shinichi SATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/12/20 Vol. E82-A No. 12 pp. 2677-2686 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA cellular system, traffic distribution, communications quality, uplink/downlink,
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Code Acquisition of a DS/SS Signal with Transmit and Receive Antenna Diversity Youhei IKAI Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/12/20 Vol. E82-A No. 12 pp. 2728-2734 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: spread spectrum, acquisition, indoor radio transmission, diversity, fading,
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Adaptive Array Antennas for the Base Station of a Multi Processing Gain CDMA System Akihito MORIMOTO Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/12/20 Vol. E82-A No. 12 pp. 2687-2696 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: adaptive array antenna, CDMA, despreading procedure, interference cancellation,
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FOREWORD Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/12/20 Vol. E82-A No. 12 pp. 2615-2615 Type of Manuscript: FOREWORD Category: Keyword:
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Decorrelating Detector for Multi-Processing Gain CDMA Systems Hiroyuki HIRAIWA Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/12/20 Vol. E82-A No. 12 pp. 2774-2777 Type of Manuscript: Special Section LETTER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: decorrelating detector, CDMA, multi-processing gain, multiuser detection,
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FOREWORD Akira OGAWA Kohichi SAKANIWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/10/20 Vol. E82-A No. 10 pp. 1997-1997 Type of Manuscript: FOREWORD Category: Keyword:
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An Integrated Voice/Data CDMA Packet Communications with Multi-Code CDMA Scheme Abbas SANDOUK Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/10/20 Vol. E82-A No. 10 pp. 2105-2114 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Communication Systems Keyword: integrated voice and data, packet CDMA, CDMA ALOHA, multi-code CDMA, throughput, outage probability, MCLSP,
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Hierarchical Transmission of Huffman Code Using Multi-Code/Multi-Rate DS/SS Modulation with Appropriate Power Control Satoshi MAKIDO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/12/20 Vol. E81-B No. 12 pp. 2283-2289 Type of Manuscript: Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research) Category: Transmission and Modulation Keyword: Huffman code, multi-code SS, parallel transmission, hierarchical transmission,
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New Quasi-Synchronous Sequences for CDMA Slotted ALOHA Systems Masato SAITO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/11/20 Vol. E81-A No. 11 pp. 2274-2280 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA slotted ALOHA system, QS-sequences, access timing error, orthogonal Gold sequences, flat fading channel,
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Performance Evaluation of DS/CDMA Communications Systems Modulated with π/2-Shift BPSK over Multipath Rayleigh Fading Channels M. M. Asadullah GALIB Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/11/20 Vol. E81-A No. 11 pp. 2304-2310 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: π/2-shift BPSK, DS/SS/CDMA, soft/hard-limiter, out-of-band power, spectral efficiency, RAKE receiver,
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Initial Acquisition of Code Timings and Carrier Frequencies of CDM Down-Link Signals in Multiple-LEO-Satellite Communication Systems Mihoko ISHIZU Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/11/20 Vol. E81-A No. 11 pp. 2281-2290 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: spread-spectrum, Doppler offset, initial acquisition, CDM, FFT,
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Queueing Analysis of CDMA Unslotted ALOHA Systems with Finite Buffers Hiraku OKADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/10/20 Vol. E81-A No. 10 pp. 2083-2091 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Spread Spectrum System Keyword: CDMA unslotted ALOHA, finite buffer capacity, packet queueing, Markov chain,
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Error Correcting Capability of Constant Amplitude Coding for Orthogonal Multi-Code CDMA Systems Tadahiro WADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/10/20 Vol. E81-A No. 10 pp. 2166-2169 Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications) Category: Coding Theory Keyword: orthogonal multi-code CDMA systems, constant amplitude coding, nonlinear distortion, error correcting capability,
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CDMA Slotted ALOHA System with Finite Buffers Hiraku OKADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/07/20 Vol. E81-A No. 7 pp. 1473-1478 Type of Manuscript: Special Section LETTER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network) Category: Keyword: CDMA slotted ALOHA, finite buffer capacity, finite population, throughput, average delay, rejection probability,
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Multi-Antenna Transmission Scheme for Convolutionally Coded DS/CDMA System Koichiro BAN Masaaki KATAYAMA Wayne E. STARK Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/12/20 Vol. E80-A No. 12 pp. 2437-2444 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: multi-antenna transmission, convolutional codes, fading, CDMA, diversity,
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Effects of Transmission Control in an Integrated Voice and Data CDMA System Takeshi SATO Abbas SANDOUK Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/12/20 Vol. E80-A No. 12 pp. 2509-2516 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA, CLSP, voice, data,
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A Spread-Spectrum System with Dual Processing Gains Designed for Cyclic Noise in Power Line Communications Hisashi NIWA Osamu OONO Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA Noriyuki ISAKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/12/20 Vol. E80-A No. 12 pp. 2526-2533 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: power line communications, spread spectrum, cyclic noise, dual processing gains,
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A Simple Transmit/Receive Antenna Diversity for Indoor DS/CDMA Wireless Communication Systems Koichiro BAN Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1997/12/20 Vol. E80-B No. 12 pp. 1790-1796 Type of Manuscript: PAPER Category: Radio Communication Keyword: multi-antenna transmission, flat fading, CDMA, diversity,
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A Constant Amplitude Coding for Orthogonal Multi-Code CDMA Systems Tadahiro WADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/12/20 Vol. E80-A No. 12 pp. 2477-2484 Type of Manuscript: Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: orthogonal multi-code CDMA systems, constant amplitude coding, Hadamard code sequences, non-liner amplifier,
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CDMA for Personal Communications Based on Low Earth-Orbital Satellite Systems Akira OGAWA Masaaki KATAYAMA Takaya YAMAZATO Abbas JAMALIPOUR
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/12/20 Vol. E80-A No. 12 pp. 2347-2356 Type of Manuscript: INVITED PAPER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA, PCS, LEOS, multiple access, code acquisition, traffic nonuniformity, CDMA ALOHA,
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An Initial Acquisition Method for M-Ary Spread-Spectrum Signals Using Hadamard Code Sequences Tadahiro WADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/11/20 Vol. E80-A No. 11 pp. 2172-2179 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Communications/Coded Modulation/Spread Spectrum Keyword: M-ary/SS communication system, initial acquisition method, carrier frequency offset, Hadamard code sequences,
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π/2-shift BPSK A Modulation Scheme Robust to Nonlinear Amplification for CDMA Mobile Communications Kumud KASHYAP Tadahiro WADA Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/09/20 Vol. E80-A No. 9 pp. 1634-1639 Type of Manuscript: Special Section LETTER (Special Section on Nonlinear Theory and its Applications) Category: Keyword: π/2-BPSK, CDMA, spread spectrum, nonlinear amplifier, coherent detection, differential detection,
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Throughput Improvement of CDMA Slotted ALOHA Systems Masato SAITO Hiraku OKADA Takeshi SATO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1997/01/20 Vol. E80-B No. 1 pp. 74-80 Type of Manuscript: Special Section PAPER (Special Issue on Advances in Satellite Communications toward Multimedia Era) Category: Protocol Keyword: CDMA slotted ALOHA systems, QS-sequences, access timing error, modified channel load sensing protocol, access timing delay,
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CDMA ALOHA Systems with Modified Channel Load Sensing Protocol for Satellite Communications Hiraku OKADA Masato SAITO Takeshi SATO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/12/20 Vol. E79-A No. 12 pp. 2035-2042 Type of Manuscript: Special Section PAPER (Special Secton on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA ALOHA, throughput, access control, access timing delay,
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DS/SS/GMSK with Differential Detection Over Multipath Reyleigh Fading Channels Isamu WAKAKI Takayuki ISHIGURO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/12/20 Vol. E79-A No. 12 pp. 1957-1962 Type of Manuscript: Special Section PAPER (Special Secton on Spread Spectrum Techniques and Applications) Category: Keyword: GMSK, CDMA, spread spectrum, differential detection, RAKE,
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A New M-ary Spread-Spectrum Multiple-Access Scheme in the Presence of Carrier Frequency Offset Tadahiro WADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/09/20 Vol. E79-A No. 9 pp. 1415-1422 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Communication/Spread Spectrum Keyword: M-ary/SSMA communication scheme, carrier frequency offset, multipath-access interference, Hadamard codes,
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Coordinate Interleaved Trellis Coded QPSK with T-Algorithm on Rayleigh Fading Channel Hiroki NAKAMURA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/09/20 Vol. E79-B No. 9 pp. 1248-1255 Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications) Category: Modulation, Equalization and interference cancellation technologies Keyword: T-algorithm, convolutional code, coordinate interleaving, fading channels,
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Effects of the Access Timing Delay on CDMA Unslotted ALOHA with Channel Load Sensing Takeshi SATO Hiraku OKADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/09/20 Vol. E79-B No. 9 pp. 1339-1345 Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications) Category: CDMA and multiple access technologies Keyword: CDMA ALOHA, CLSP, access timing delay,
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Effects of Multiple Access Interference in a Multi-Rate SSMA System Motohiro ICHIBA Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/09/20 Vol. E79-B No. 9 pp. 1333-1338 Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications) Category: CDMA and multiple access technologies Keyword: wireless multimedia communication systems, multirate signal, spread spectrum, different processing gains, crosscorrelation,
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CDMA Unslotted ALOHA Systems with Packet Retransmission Control Hiraku OKADA Takeshi SATO Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/07/20 Vol. E79-A No. 7 pp. 1004-1010 Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Informatin Network) Category: Keyword: CDMA unslotted ALOHA, throughput, delay, system stability, retransmission control,
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Adaptive Transmit Permission Control on Spread-Slotted Aloha Packets Applicable in LEOS Systems Abbas JAMALIPOUR Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/03/20 Vol. E79-B No. 3 pp. 257-265 Type of Manuscript: Special Section PAPER (Special Issue on Advanced Adaptive Radio Communication Technologies) Category: Access, Network Keyword: spread spectrum, slotted-Aloha, mobile communications, adaptive service area, interference reduction, throughput,
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Throughput Analysis of Spread-Slotted ALOHA in LEO Satellite Communication Systems with Nonuniform Traffic Distribution Abbas JAMALIPOUR Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1995/12/20 Vol. E78-B No. 12 pp. 1657-1665 Type of Manuscript: PAPER Category: Satellite Communication Keyword: LEO satellite systems, nonuniform traffic distribution, spread-slotted ALOHA packet communication, throughput analysis,
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Estimation of the Location of Intracranial Vascular Diseases Using Several Sensors Satoshi HONGO Masato ABE Yoshiaki NEMOTO Noriyoshi CHUBACHI Yasunari OTAWARA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1995/12/20 Vol. E78-A No. 12 pp. 1640-1648 Type of Manuscript: Special Section PAPER (Special Section on Acoustic Diagnosis) Category: Keyword: cranial bruit, cross-spectrum, non-invasive measurement, aneurysm, weighted least squares method,
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Performance of Bit-Interleaved Trellis Coded 16-QAM with Maximized Code Diversity Akio AOYAMA Hitoshi NAKAGAWA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1995/09/20 Vol. E78-A No. 9 pp. 1215-1219 Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications) Category: Keyword: TCM, Rayleigh fading channel, bit interleaving, 16QAM,
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Non-coherent Reception of M-ary Spread-Spectrum Signals in the Presence of Carrier Frequency Offset Tadahiro WADA Takaya YAMAZATO Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1995/09/20 Vol. E78-A No. 9 pp. 1102-1108 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Keyword: M-ary spread-spectrum communication system, non-coherent reception, carrier frequency offset, Hadamard matrix,
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Effect of Nonlinear Amplification on a Spread Spectrum Signal and Receiver Configurations Manabu SAWADA Masaaki KATAYAMA Takaya YAMAZATO Akira OGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1994/11/20 Vol. E77-A No. 11 pp. 1855-1862 Type of Manuscript: Special Section PAPER (Special Section on Nonlinear Theory and Its Applications) Category: Nonlinear Channel Keyword: nonlinear amplification, spread spectrum, radio communication, MLSE,
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Performance of Asynchronous Band-Limited DS/SSMA Systems Takafumi SHIBATA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1993/08/20 Vol. E76-B No. 8 pp. 921-928 Type of Manuscript: Special Section PAPER (Special Issue on Spread Spectrum Techniques and Applications) Category: Keyword: direct-sequence spread-spectrum multiple-access, signal-to-noise plus interference ratio, band-limitation, spectral efficiency, gold sequence,
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Effect of Nonlinear Amplifiers of Transmitters in the CDMA System Using Offset-QPSK Manabu SAWADA Masaaki KATAYAMA Akira OGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1993/07/20 Vol. E76-B No. 7 pp. 741-744 Type of Manuscript: Special Section LETTER (Special Section of Letters Selected from the 1992 IEICE Fall Conference and the 1993 IEICE Spring Conference) Category: Keyword: radio communication, nonlinear amplifier, CDMA, offset-QPSK,
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Bit Error Rate Performance of Soft Decision Viterbi Decoding Yutaka YASUDA Yasuo HIRATA Akira OGAWA
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1981/11/20 Vol. E64-E No. 11 pp. 700-707 Type of Manuscript: PAPER Category: Transmission Systems Keyword:
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A Unique Word Detection Method and Its Error Rate Performance Akira OGAWA Hideo OKINAKA
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1981/09/20 Vol. E64-E No. 9 pp. 595-601 Type of Manuscript: PAPER Category: Applications Keyword:
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