Papers - YAMAZATO Takaya

A Study on Approximation Effects of TCP Analysis

K.Naito, H.Okada, T.Yamazato, M.katayama and A.Ogawa

Communications Society Conference of IEICE     page： -   2000

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Influence of two kinds of Packet Existence Detection Error on CDMA Unslotted ALOHA System Employing Successive Interference Cancellation

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

Enginnering Sciences Society Conference of IEICE     page： -   2000

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An Initial Code Acqusition Scheme for Indoor Packet DS/SS Systems with Macro/Micro Antenna Diversity Reviewed

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

IEICE Transaction on Fundamentals of Electronics, Communications and Computer Sciences   Vol. E83-A ( 11 ) page： -   2000

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A Study on Cross-Correlation Property in Orthogonal Multi-Code CDMA Systems Reviewed

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

IEICE Transaction on Fundamentals of Electronics, Communications and Computer Sciences   Vol. J83 ( 5 ) page： 589-593   2000

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Adaptive Transmit Permission Probability Control in CDMA Cellular Packet Communications with Site Diversity Reviewed

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

IEICE Transaction on Communications.   Vol. E83-B ( 7 ) page： -   2000

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Effects of Cell Structure on Quality of Service of LEOS Communication Systems Reviewed

K.Ono, M. Katayama, T. Yamazato, A. Ogawa

IEICE Transaction on Communications   Vol. E83-B ( 4 ) page： 782-790   2000

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Service Fairness in CDMA Cellular Packet Systems with Site Diversity Reception, Reviewed

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

IEICE Transaction on Communications   Vol. E82-B ( 12 ) page： 1964-1973   2000

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Throughput Analysis of TCP in Wireless Environment

K. Naito, H. Okada, M. Saito, T. Yamazato, M. Katayama and A. Ogawa

Technical Report of IEICE   Vol. RCS99-232   page： 107-113   2000

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Evaluation of Interference between UP- and Down-Links on CDMA Cellular Packet Systems Employing a Shared-TDD Scheme

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

General Conference of IECIE   Vol. SB-3-2   page： 739   2000

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A Study on Noise Enhancement and Cross Correlation in Synchronous CDMA Systems with Decorrelating Detector

Masato Saito, Hiraku Okada, Takaya Yamazato, Masaaki Katayama, Akira Ogawa

Technical Report of IEICE   Vol. SST   page： -   2000

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Chip by Chip Turbo Coded CDMA System

T. Yamazato

YRP Telecom Summit, YRP, Yokosuka, Japan   Vol. YRP   page： -   2000

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A Note on a Transmit Adaptive Array Antennas and its Capacity Enhancementin a cellular CDMA

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

Technical Report of IEICE   Vol. SST-2000-20   page： 39275   2000

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Influence of Beam Pattern on the Capacity of LEOS Communication Systems Reviewed

N. Ichikawa, M. Katayama T. Yamazato and A. Ogawa

ISCOM'99, Kaohsiung, Taiwan   Vol. ISCOM'99   page： -   2000

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Code Acquisition of a DS/SS Signal with Transmit and Receive Antenna Diversity Reviewed

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

IEICE Transaction on Communications   Vol. E82-A ( 12 ) page： 2728-2734   2000

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OFDM Systems with Reduced Nonlinear Effect Reviewed

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

IEEE Vehicular Technology Conference (VTC Fall)   Vol. VTC2000   page： -   2000

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OFDM Systems with Multiple Trellis Coded Modulation Reviewed

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

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)   Vol. PIMRC2000   page： -   2000

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Adaptive Array Antennas for the Base Station of a Multi Processing Gain CDMA System Reviewed

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

IEICE Transaction on Communications   Vol. E82-A ( 12 ) page： 2687-2696   2000

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A Study on Constant Amplitude Transmission for Orthogonal Multicode Systems Reviewed

T. Wada, and T. Yamazato

International Symposium on Information Theory and Its Applications (ISITA)   Vol. ISITA2000   page： 576-579   2000

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In this paper, we deal with the constant amplitude orthogonal multicode systems. The constant amplitude transmission has the advantage of the high power efficiency because the high power amplifier which has non-linear characteristic can be applied for the amplification of the signals. In this paper, we show the bent sequences can achieve the constant amplitude transmission and also show the effectiveness of the constant amplitude transmission in terms of symbol error rate.

A Study on Weight Control Scheme of Adaptive Array Antennas with Interference Canceler

Takayuki Suzuki, Masaaki Katayama, Takaya Yamazato, Akira Ogawa

Technical Report of IEICE   Vol. RCS   page： -   2000

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Throughput Performance of CDMA Unslotted ALOHA System with Successive Interference Cancellation considering Detection Error of Packet Existance Reviewed

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

International Symposium on Information Theory and Its Applications (ISITA)   Vol. ISITA2000   page： 728-731   2000

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In CDMA ALOHA system, Multiple Access Interference(MAI) is in existence and it has large influence on the system performance. To suppress the influence, we proposed new system in which SIC is applied to CDMA Unslotted ALOHA. But because of random access and time-short packets, it is very difficult to detect packet existence perfectly. So, in this paper, we evaluate the influence of detection error of packet existence in proposed system by throughput performance.