Faculty Profiles - YAMAZATO Takaya

Papers - YAMAZATO Takaya

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Performance Improvements applying an Adaptive Array Antenna at both the Base and Mobile Stations in Cellular CDMA Reviewed

Youssef R. Senhaji, H. Okada, T. Yamazato, M. Katayama and A. Ogawa

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) Vol. PIMRC99 page： - 1999

Acquisition of a DS/SS Signal with Macro/Micro Antenna Diversity under Raylgh Fading and Log-normal Shadowing Reviewed

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

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) Vol. PIMRC99 page： - 1999

Transmitter Precoding with Multiple Transmit/Receive Antennas for High Data Rate Communication in Bandwidth-Limited Channels

K. Ban, M. Katayama, T. Yamazato, and A. Ogawa

IEEE VTC'99 Fall Vol. VTC'99 page： - 1999

A Study on the Error Control Scheme in Data Transmission for Positioning of Sea Turtles

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

Technical Report of IEICE, vol.SANE99-64, pp.105-108 (1999-02) Vol. SANE99 ( 64 ) page： 105-108 1999

A New Acquisition Scheme of a DS/SS Signal with Transmit and Receive Antenna Diversity Reviewed

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

IEEE International Conference on Communications (ICC99) Vol. ICC'99 page： - 1999

Chip-by-Chip Turbo Coding for DS/SS Systems Reviewed

C. Zheng, T. Yamazato, M. Katayama, A. Ogawa

IEICE Transaction on Communications Vol. E82-A ( 12 ) page： 2751-2757 1999

Decorrelating Detector for Multi-Processing Gain CDMA Systems Reviewed

H. Hiraiwa, M. Katayama,T. Yamazato, A. Ogawa

IEICE Transaction on Fundamentals of Electronics, Communications and Computer Sciences Vol. E82-A ( 12 ) page： 2751-2757 1999

Applying Successive Interference Cancellation to CDMA Unslotted ALOHA System

Y. Tadokoro, H. Okada, M. Saito, T. Yamazato, M. Katayama, A. Ogawa

Technical Report of IEICE Vol. SST99 ( 34 ) page： 25-30 1999

A Study on Multiple Trellis Coded Modulation for Multicarrier Systems

M. Harada, T. Yamazato, M. Katayama, A. Ogawa

Technical Report of IEICE, vol.SST99-32, pp.13-18 (1999-9) Vol. SST99 ( 32 ) page： 13-18 1999

Throughput Performance of CDMA ALOHA (invited)

A. Ogawa, T. Yamazato, H. Okada, M. Katayama

Technical Report of IEICE, vol.SAT99-41, p.99 (1999-6) Vol. SAT99 ( 41 ) page： 99 1999

Error Resilient Video Coding System for Wireless Communication -Using Motion Compensted Field Reviewed

M. Honjo, S. Makido, T. Yamazato, M. Katayama and A. Ogawa

WPMC'99, Amsterdam, Netherlands Vol. WPMC'99 page： - 1999

Transmitter Precoding with Multiple Transmit/Receive Antennas for High Date Rate Communication in Bandwidth-limited Channels Reviewed

K. Ban, M. Katayama, T. Yamazato, and A. Ogawa

IEEE Vehicular Technology Conference (VTC Fall) Vol. IEEE VTC'101 Fall page： - 1999

Throughput Performance of CDMA Slotted ALOHA Systems with Accurate Packet Success Probability Reviewed

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

WPMC'99, Amsterdam, Netherlands Vol. WPMC'99 page： - 1999

Acquisition of a DS/SS Signal with Macro/Micro Antenna Diversity under Rayleigh Fading and Log-normal Shadowing Reviewed

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

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) Vol. PIMRC99 page： - 1999

Throughput Improvement of a Dual-Class Multi-code CDMA ALOHA System with Modified Channel Load Sensing Protocol Reviewed

A. Sandouk, H. Okada, T. Yamazato, M. Katayama, and A. Ogawa

IEEE International Conference on Communications (ICC99) Vol. ICC'99 page： - 1999

Performance Improvements applying an Adaptive Array Antenna at both the Base and Mobile Stations in Cellular CDMA Reviewed

Youssef R. Senhaji, H. Okada, T. Yamazato, M. Katayama and A. Ogawa

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) Vol. PIMRC99 ( 3 ) page： 982-986 1999

A Study for the Throughput Performance of CDMA Slotted ALOHA Systems

M. Saito, T. Yamazato, M. Katayama, A. Ogawa

Technical Report of IEICE, vol.SST99-21, pp.37-42 (1999-7) Vol. SST99 ( 21 ) page： 37-42 1999

Service Fairness in CDMA Cellular Slotted-ALOHA Packet Systems Reviewed

K. Mori, T. Kobayashi, T. Yamazato and A. Ogawa

IEEE Global Communications Conference (Globecom1999) Vol. Globecom'99 page： 655-660 1999

A new acquisition scheme of a DS/SS signal with transmit and receive antenna diversity Reviewed

Ikai Y., Katayama M., Yamazato T., Ogawa A.

IEEE International Conference on Communications Vol. 2 page： 1256 - 1261 1999

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEE International Conference on Communications

We propose the introduction of space diversity techniques to the code acquisition of a direct-sequence spread-spectrum signal. In this scheme, both a transmitter and a receiver have multiple antennas and the signals corresponding to all the combinations of the transmitter/receiver antennas are combined at the acquisition circuit of the receiver. The performance is evaluated for indoor packet radio communication systems from the viewpoints of average time for acquisition, probability of success of acquisition, and necessary preamble length. As the result, we show great performance improvements by the proposed scheme under slow and flat Rayleigh fading environment.

DOI： 10.1109/ICC.1999.765524

Scopus

A scheme for throughput improvement in voice/data CDMA packet communications Reviewed

Abbas Sandouk, Takaya Yamazato, Masaaki Katayama, Akira Ogawa

IEEE Vehicular Technology Conference Vol. 50 ( 1 ) page： 362 - 366 1999

Language：English Publishing type：Research paper (international conference proceedings)

In this paper, voice and data users with different bit rales are integrated in multi-code CDMA slotted ALOHA (MC-CDMA S-ALOHA) system. Performance measurement is obtained in the respect of throughput for data and outage probability for voice. Moreover, we consider the Modified Channel Load Sensing Protocol (MCLSP) as a traffic control to improve the throughput of data. We show that the MC-CDMA technique is an effective one to obtain a good throughput for data at an acceptable voice outage probability. We also show that the throughput of data can be improved with MCLSP. © 1999 IEEE.

DOI： 10.1109/VETECF.1999.797157

Scopus

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Papers - YAMAZATO Takaya