Faculty Profiles - YAMAZATO Takaya

Papers - YAMAZATO Takaya

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Spectral Efficiency of DS/SS/GMSK System with RAKE

T. Ishiguro, M. Katayama, T. Yamazato, A. Ogawa and T. Maebara

1994 IEICE Fall Conference Vol. A-146 page： - 1994.9

A Study on Reception of M-ary/Spread-Spectrum Signals with Carrier Frequency Offset

T. Wada, T. Yamazato, M. Katayama and A. Ogawa

Technical Report of IEICE Vol. SST94-41 page： 51-56 1994.8

Multiple-Symbol Differential Detection on 16 Circular Shaped Signal Constellation Reviewed

Nakagawa Hitoshi, Yamazato Takaya, Katayama Masaaki, Ogawa Akira

IEICE technical report. Communication systems Vol. 94 ( 108 ) page： 55 - 60 1994.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers

Multiple-symbol differential detection of 16DAPSK is attractive in the field of mobile communication because of its good error rate performance.In this paper,we study multiple-symbol differential detection on 16 circular shaped signal constellation(CSSS)whose minimum distance is larger than that of 16DAPSK signal constellation.Their error rate performances over an AWGN channel are compared by computer simulation.As a result,we show that error rate is affected by both Euclid distance and phase difference on signal constellation,and comparatively good error rate performance is obtained on(7,9)CSSS.

CiNii Research

Inter-chip interference rejection in DS/SS/GMSK applied RAKE

T. Ishiguro, M. Katayama, T. Yamazato, A. Ogawa and T. Maebara

Technical Report of IEICE Vol. SST94 ( 10 ) page： 31-36 1994.6

Throughput of Spread Unslotted Aloha in an Additive White Gaussian Noise Channel

T. Sato, K. Toshimitsu, T. Yamazato, M. Katayama and A. Ogawa

Technical Report of IEICE Vol. SST94 ( 9 ) page： 25-30 1994.6

A Study of M-algorithm combined with Pre-Decoding

H. Nakamura, T. Yamazato, M. Katayama and A. Ogawa

Technical Report of IEICE Vol. CS94 ( 37 ) page： 39275 1994.6

Multiple-Symbol Differential Detection on 16 Circular Shaped Signal Constellation

H. Nakagawa, T. Yamazato, M. Katayama and A. Ogawa

Technical Report of IEICE Vol. RCS94 ( 36 ) page： 55-60 1994.6

A NOVEL SPREAD SLOTTED ALOHA SYSTEM WITH CHANNEL LOAD SENSING PROTOCOL Reviewed

TOSHIMITSU K, YAMAZATO T, KATAYAMA M, OGAWA A

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS Vol. 12 ( 4 ) page： 665 - 672 1994.5

A NOVEL SPREAD SLOTTED ALOHA SYSTEM WITH CHANNEL LOAD SENSING PROTOCOL Reviewed Open Access

K TOSHIMITSU, T YAMAZATO, M KATAYAMA, A OGAWA

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS Vol. 12 ( 4 ) page： 665 - 672 1994.5

Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

This paper presents a noval spread slotted Aloha system with channel load sensing protocol (CLSP). CLSP is an effective scheme to improve the throughput performance in spread unslotted Aloha systems. In spread slotted Aloha systems, however, it does not make sense to utilize CLSP because the slot size is usually the same as the packet size. The slot size of the proposed system is set less than the packet size, thereby enabling us to apply CLSP and improving the throughput performance. Another feature of the proposed system is that the system is not likely affected by the time difference between channel load sensing and timing of packet access, which we call the access timing delay. Throughput performance of the proposed system is evaluated in the presence of the access timing delay and a significant increase of the throughput is shown compared with that of spread unslotted Aloha with CLSP.

DOI： 10.1109/49.286673

Acquisition of DS/SS Signal with Frequency Offset using Matched Filters

M. Mizutani, M. Katayama, T. Yamazato and A. Ogawa

Technical Report of IEICE Vol. SST93-109 page： 55-60 1994.3

A Study on Bit-Interleaved Coded Modulation for a Rayleigh Fading Channel

A. Aoyama, T. Yamazato, M. Katayama and A. Ogawa

Technical Report of IEICE Vol. IT93-116 page： 61-66 1994.3

A Novel Variable Source Coding Algorithm Based on LZW Adopting Move to Front Method

S. Hayashi, J. Kubo, T. Yamazato and I. Sasase

1994 IEICE Spring Conference Vol. A-370 page： - 1994.3

Diversity Effect on Coded Modulation System in Rayleigh Channel

T. Yamazato, M. Katayama and A. Ogawa

1994 IEICE Spring Conference Vol. A-364 page： - 1994.3

Throuput of Spread Unslotted Aloha System

T. Sato, K. Toshimitsu, T. Yamazato, M. Katayama and A. Ogawa

1994 IEICE Spring Conference Vol. A-278 page： - 1994.3

Performance of Bit-by-Bit Interleaved Trellis-Coded 16QAM in Land Mobile Communications

A. Aoyama, T. Yamazato, M. Katayama and A. Ogawa

1994 IEICE Spring Conference Vol. B-358 page： - 1994.3

Simultaneous Transmission of two Spread Spectrum Signals of Different Process Gains

M. Ichiba, M. Katayama, T. Yamazato and A. Ogawa

Technical Report of IEICE Vol. SAT93 ( 90 ) page： 17-24 1994.2

Spread Unskotted Aloha 方式のスループット特性

岡田啓, 佐藤毅, 山里敬也, 片山正昭, 小川明

1994年電気学会東海支部連合大会 page： 516 1994

Near-Far Problem on Hybrid Direct-Sequence/Slow-Frequency-Hopping Spread-Spectrum Multiple-Access. Reviewed

T. Yamazato, Y. Shinkaji, M. Katayama and A. Ogawa

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) Vol. PIMRC94 ( C3-2 ) page： 319-323 1994

A New Code Acquisition Scheme Using Divided Matched Filters for DS/SS Signal with Frequency Offset Reviewed

M. Mizutani, M. Katayama, T. Yamazato and A. Ogawa

International Conference on Communication Systems page： 379-383 1994

A Study on Quasi-Synchronous CDMA Based on Selected PN Signature Sequences Reviewed

S. Kuno, T. Yamazato, M. Katayama and A. Ogawa

IEEE International Symposium on Spread Spectrum Techniques & Applications Vol. ISSSTA94 page： 479-483 1994

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Papers - YAMAZATO Takaya