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Research Output

2001

Design and evaluation of software radio prototype with over-the-air download function

Shiba, H., Shono, T., Uehara, K. & Kubota, S., 2001 Jan 1, In : IEEE Vehicular Technology Conference. 4, 54ND, p. 2466-2469 4 p.

Research output: Contribution to journalConference article

Excess hard X-ray emission from the obscured low luminosity AGN in the nearby galaxy M 51 (NGC5194)

Fukazawa, Y., Iyomoto, N., Kubota, A., Matsumoto, Y. & Makishima, K., 2001 Jul 1, In : Astronomy and Astrophysics. 374, p. 73-82

Research output: Contribution to journalArticle

Normalized Least Square Method for Cellular-based Position Detection Services

Shibuya, A., Nakatsugawa, M., Kubota, S., Kudoh, E. & Suda, H., 2001 Jul 1, In : Wireless'2001. p. 260-264

Research output: Contribution to journalArticle

Proposal for system diversity on software defined radio

Shono, T., Uehara, K. & Kubota, S., 2001 Sep, In : IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. E84-A, 9, p. 2346-2358 13 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Proposal for System Diversity on Software-Defined Radio

Shono, T., Kubota, S. & Uehara, K., 2001 Sep 1, In : IEICE Transaction on Fundamentals.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Research and Development of Software-Defined Radio Technologies in Japan

Nakajima, N., Kohno, R. & Kubota, S., 2001 Aug 1, In : Default journal. 39, p. 146-155

Research output: Contribution to journalArticle

36 Citations (Scopus)

Research and developments of software-defined radio technologies in Japan

Nakajima, N., Kohno, R. & Kubota, S., 2001 Aug 1, In : IEEE Communications Magazine. 39, 8, p. 146-154 9 p.

Research output: Contribution to journalArticle

36 Citations (Scopus)

Spatially dependent response of thick and large are p-i-n diode for ASTRO-E hard X-ray detector

Sugiho, M., Kamae, T., Makishima, K., Takehashi, T., Murakami, T., Tashiro, M., Fukazawa, T., Iyomoto, N. & Kubota, S., 2001 Jun 1, In : IEEE Trans. Nucl. Sci.. 48, p. 426-429

Research output: Contribution to journalArticle

16 Citations (Scopus)

Spectral transitions of X-ray sources in IC 342

Kubota, A., Mizuno, T., Makishima, K., Fukuzawa, Y., Kotoku, J., Ohnishi, T. & Tashiro, M., 2001 Feb 1, In : The Astrophysical Journal. 547, p. L119-L122

Research output: Contribution to journalArticle

Trends in the research and development of software radio

Uehara, K., Nakatsugawa, M., Kubota, S. & Mizuno, H., 2001 Jan 1, In : NTT R and D. 50, 1, p. 33-40 8 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

X-ray Study of Optically Thick Accretion Disks Around Steel lar Black Holes - The Standard Accretion Disk and Beyo

Kubota, A., Makishima, K. & Ebisawa, K., 2001 Mar 1, In : New Century of X-ray Astronomy. 251, p. 80

Research output: Contribution to journalArticle

2000

A High-accuracy Pedestrian Positioning Information System using Pico Cell Techniques

Shibuya, A., Nakatsugawa, M., Kubota, S. & Ogawa, T., 2000 May 1, In : IEEE International Conference on Vehicle Technology (VTC'2000-S).

Research output: Contribution to journalArticle

3 Citations (Scopus)

An effective data transmission control method for mobile terminals in spot communication systems

Yoshioka, H., Nakatsugawa, M. & Kubota, S., 2000 Jan 1, In : IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. E82-A, 7, p. 1328-1337 10 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

ASCA Observation of ultra-Luminous X-ray Source in the Nearby Spiral Galaxy NGC 2403

Kotoku, J., Mizuno, T., Kubota, A. & Makishima, K., 2000 Dec 1, In : Publications of the Astronomical Society of Japan. 52, p. 1081-L1085

Research output: Contribution to journalArticle

13 Citations (Scopus)

A Study on an Over-the Air Download Scheme for Software Radios

Shiba, H., Shono, T., Uehara, K. & Kubota, S., 2000 Nov 1, In : International Workshop on Mobile Multimedia Communications.

Research output: Contribution to journalArticle

Common Carrier Activities in SDR: Prototype Implementation of SDR Systems

Kubota, S., Uehara, K. & Nakatsugawa, M., 2000 Apr 1, In : Default journal. p. 161-173

Research output: Contribution to journalArticle

Design of software radio for cellular communication systems and wireless LANs

Uehara, K., Tanaka, H., Shiba, H., Suzuki, Y., Nakatsugawa, M., Shirato, Y. & Kubota, S., 2000 Dec 1, p. 474-478. 5 p.

Research output: Contribution to conferencePaper

7 Citations (Scopus)

Flexible security systems and a new structure for electronic commerce on software radio

Sugita, M., Uehara, K. & Kubota, S., 2000 Dec 1, In : IEEE Vehicular Technology Conference. 6, 52 ND, p. 3033-3040 8 p.

Research output: Contribution to journalConference article

9 Citations (Scopus)

High-accuracy pedestrian positioning information system using pico cell techniques

Shibuya, A., Nakatsugawa, M., Kubota, S. & Ogawa, T., 2000 Jan 1, In : IEEE Vehicular Technology Conference. 1, p. 496-500 5 p.

Research output: Contribution to journalConference article

3 Citations (Scopus)

Pico Cell Network for Local Information and Positioning System

Kudoh, E., Shibuya, A., Ogawa, T., Uchida, D., Nakatsugawa, M., Suda, H. & Kubota, S., 2000 Oct 1, In : Annual Conference of the IEEE Industrial Electronics Society (IECON'2000). p. 1165-1170

Research output: Contribution to journalArticle

Pico cell network for local positioning and information system

Kudoh, E., Shibuya, A., Ogawa, T., Uchida, D., Nakatsugawa, M., Suda, H. & Kubota, S., 2000 Jan 1, IECON Proceedings (Industrial Electronics Conference). IEEE Computer Society, p. 1165-1170 6 p. 972287. (IECON Proceedings (Industrial Electronics Conference); vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

SDR Application for the Next Generation Wireless Access: Prototype Implementation

Kubota, S., Uehara, K. & Nakatsugawa, M., 2000 Sep 1, In : Default journal.

Research output: Contribution to journalArticle

Software Defined Radio Prototypes for Multimode Operation

Suzuki, Y., Uehara, K., Nakatsugawa, M. & Kubota, S., 2000 Nov 1, In : Workshop on Personal Mobile Communications (WPMC'2000).

Research output: Contribution to journalArticle

Software radio base and personal stations for cellular/PCS systems

Nakatsugawa, M., Uehara, K., Suzuki, Y. & Kubota, S., 2000 Jan 1, In : IEEE Vehicular Technology Conference. 1, p. 617-621 5 p.

Research output: Contribution to journalConference article

Software Radio Base and Personal Stations Prototypes

Suzuki, Y., Uehara, K., Nakatsugawa, M., Shirato, Y. & Kubota, S., 2000 Jun 1, In : IEICE Transaction on Communications.

Research output: Contribution to journalArticle

19 Citations (Scopus)

The Nature of Ultra-Luminous Compact X-ray Sources in Nearby Spiral Galaxies

Makishima, K., Kubota, A., Mizuno, T., Ohnishi, T., Tashiro, M., Aruga, Y., Asai, K., Dotani, T. & ?7?, ., 2000 Jun 1, In : The Astrophysical Journal. 535, p. 632-643

Research output: Contribution to journalArticle

What is software radio communication

Kubota, S., 2000 Jan 1, In : Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers. 54, 12, p. 1723-1724 2 p.

Research output: Contribution to journalArticle

Open Access
1999

ASCA observations of the X-ray transient YTE J1550-564 : change of accretion disk parameters

Kubota, A., Marchall, F., Makishima, K., Dotani, T., Inoue, H. & Negoro, H., 1999 Apr 1, In : Astronomische Nachrichten. 320, p. 353

Research output: Contribution to journalArticle

Fabrication of the ASTRO-E Hard X-Ray Detector

Nakazawa, K., Kamae, T., Mikishima, K., Takahashi, T., Murakami, T., Tashiro, M., Fukuzawa, Y., Tamura, T., ?26? ?34??17??, . . & Kubota, S., 1999 Oct 1, In : SPIE. 3765, p. 148-159

Research output: Contribution to journalArticle

21 Citations (Scopus)

High capacity and wide coverage cell station for personal communication systems

Kobayashi, K., Kumagai, T., Kubota, S., Ogose, S. & Hattori, T., 1999 Jan 1, In : IEICE Transactions on Communications. E82-B, 1, p. 112-118 7 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Key Technology for Future Wireless Systems

Kubota, S., Otsu, T. & Mizuno, H., 1999 Dec 1, In : Default journal. WS13-02, p. 377-382

Research output: Contribution to journalArticle

Next Generation Wireless Communications

Kubota, S., Otsu, T. & Mizuno, H., 1999 Sep 1, In : YRP他.

Research output: Contribution to journalArticle

Preflight Performance of the Astro-E Hard X-ray Detector

Tanihata, C., Kataoka, J., Makishima, K., Takehashi, T., Murakami, T., Tashiro, M., Fukuzawa, Y., Tamura, T., ?31? ?39?? 19??, . . . & Kubota, S., 1999 Oct 1, In : SPIE. 3765, p. 645-663

Research output: Contribution to journalArticle

21 Citations (Scopus)
1998

Bit significance selective frequency diversity transmission

Kumagai, T., Kobayashi, K., Kawazoe, K. & Kubota, S., 1998 Jan 1, In : IEICE Transactions on Communications. E81-B, 3, p. 545-552 8 p.

Research output: Contribution to journalArticle

High capacity and wide coverage cell station for PHS

Kobayashi, K., Kumagai, T., Kubota, S. & Ogose, S., 1998, ICUPC 1998 - IEEE 1998 International Conference on Universal Personal Communications, Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., Vol. 1. p. 33-37 5 p. 732802

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Low-power and high-quality signal transmission baseband LSIC for personal communications

Kobayashi, K., Kubota, S., Enomoto, K., Seki, K., Kawazoe, K., Sakata, T., Matsumoto, Y. & Hattori, T., 1998 Dec 1, In : IEEE Transactions on Very Large Scale Integration (VLSI) Systems. 6, 4, p. 687-696 10 p.

Research output: Contribution to journalArticle

Routing management in asymmetric networks

Miyata, S., Tanaka, T. & Kubota, S., 1998 Dec 1, In : NTT R and D. 47, 10, p. 1049-1056 8 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Simultaneous ASCA and RXTE Observations of Cygnus X-1 during its 1996 State Transition

Cui, W., Ebisawa, K., Dotani, T. & Kubota, A., 1998 Feb 1, In : The Astrophysical Journal. 493, p. L75-L78

Research output: Contribution to journalArticle

The Electronic System for the ASTRO-E X-ray Detector

Takahashi, T., Nomachi, M., Fukuzawa, Y., Tashiro, M., Ezawa, H., Hamaya, M., Isobe, M. H., ?33? ?41??15??, . . & Kubota, S., 1998 Nov 1, In : SPIE. 3445, p. 155-168

Research output: Contribution to journalArticle

1997

An FFT interference detection scheme for interference suppression in digital satellite communication systems

Sugiyama, T., Suzuki, M. & Kubota, S., 1997 Jan 1, In : IEICE Transactions on Communications. E80-B, 9, p. 1352-1362 11 p.

Research output: Contribution to journalArticle

ASCA Observation of Cygnus X-1 in the Soft State; Mass of the Compact Object

Dotani, T., Inoue, H., Mitsuda, K., Nagase, F., Negoro, H., Ueda, Y., Makishima, K., Kubota, A. & ?2?, ., 1997 Aug 20, In : The Astrophysical Journal. 485, p. 87-90

Research output: Contribution to journalArticle

Development of the large area silicon PIN diode with 2mm-thick depletion layer for Hard X-ray Detector (HXD) on-board Astro-E

Sugisaki, M., Kubo, S., Murakami, T., Ohta, N., Ozawa, H., Takahashi, T., Iyomoto, H. K., ?6? ?24??11??, . . & Kubota, S., 1997 Jul 1, In : SPIE. 3115, p. 244-253

Research output: Contribution to journalArticle

Fully digital burst modem for satellite multimedia communication systems

Kobayashi, K., Sakata, T., Matsumoto, Y. & Kubota, S., 1997 Jan 1, In : IEICE Transactions on Communications. E80-B, 1, p. 8-15 8 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)