久保田 周治

研究成果

年別の研究成果 1982 1992 1993 1994 1995 2000 2007 2017

• 2082 被引用数
• 18 h-index
• 217 Article
• 36 Conference contribution
• 19 Paper
• 12 Conference article
• 1 その他
  • 1 Review article

年別の研究成果

年別の研究成果

検索結果

• 1982

  Application of Spread Spectrum Multiple Access System to Space Communications

  Masamura, T. & Kubota, S., 1982 10月 1, In: International Symposium on Space Technology and Science (ISTS'82).

  研究成果: Article › 査読

  3 被引用数 (Scopus)
• 1986

  A High-speed and High-coding-gain Viterbi Decoder LSI with Low Power Consumption Employing SST Scheme

  Kubota, S., Ohtani, K. & Kato, S., 1986 4月 1, In: IEE Electronics letters.

  研究成果: Article › 査読

• General Purpose TDMA LSI Development for Low Cost Earth Station

  Kato, S., Morikura, M., Umehira, M. & Kubota, K. E., 1986 6月 1, In: IEEE International Conference on Communications (ICC'86).

  研究成果: Article › 査読

  3 被引用数 (Scopus)

• High-Speed and High-Coding-Gain Viterbi Decoder with Low Power Consumption Employing Sst (Scarce State Transition) Scheme

  Kubota, S., Ohtani, K. & Kato, S., 1986 1月 1, In: Electronics Letters. 22, 9, p. 491-493 3 p.

  研究成果: Article › 査読

  • Electric power utilization 100%
  • Costs 25%
  18 被引用数 (Scopus)

• SUPERVISORY AND CONTROL SYSTEM FOR SATELLITE DIGITAL COMMUNICATION SERVICE.

  Ohtani, K., Kubota, S., Nitta, S. & Atsugi, T., 1986, In: Denki Tsushin Kenkyujo kenkyu jitsuyoka hokoku. 35, 12, p. 1273-1281 9 p.

  研究成果: Article › 査読

  • Satellites 100%
  • Control systems 79%
  • Electric fault location 75%
  • Communication 64%
• 1987

  A Proposal of Universal-coding-rate Viterbi Decoder

  Kubota, S., Kato, S., Ishitani, T. & Nagatani, M., 1987 6月 1, In: IEEE International Conference on Communications (ICC'87).

  研究成果: Article › 査読

  1 被引用数 (Scopus)

• A Scarce State Transition Viterbi Decoder VLSI for Bit Error Correction

  Ishitani, T., Tansho, K., Miyahara, N., Kubota, S. & Kato, S., 1987 8月 1, In: IEEE Journal of Solid State Circuits.

  研究成果: Article › 査読

  25 被引用数 (Scopus)

• A Scarce-State-Transition Viterbi-Decoder VLSI for Bit Error Correction

  Ishitani, T., Tansho, K., Miyahara, N., Kubota, S. & Kato, S., 1987 8月, In: IEEE Journal of Solid-State Circuits. 22, 4, p. 575-582 8 p.

  研究成果: Article › 査読

  • Metallizing 100%
  • Error correction 91%
  • Bit error rate 39%
  • Energy dissipation 36%
  • Decoding 36%
  25 被引用数 (Scopus)

• Compact LSI- and IC-Implemented Burst Modem for Low Eb/No Operation

  Umehira, M., Kubota, S., Enomoto, K. & Kato, S., 1987 11月 1, In: International Conference on Global Communications (Globecom'87).

  研究成果: Article › 査読
• 1988

  Compact and High Performance TDMA Terminal for Satellite Communication

  Kato, S., Morikura, M., Umehira, M., Enomoto, K. & Kubota, S., 1988 6月 1, In: IEEE International Conference on Communications (ICC'88).

  研究成果: Article › 査読

  3 被引用数 (Scopus)

• High-speed and High-coding-rate Viterbi Decoder VLSI

  Kubota, S., Kato, S. & Nagatani, T. I., 1988 7月 1, In: IEEE International Symposium on Information Theory (ISIT'88).

  研究成果: Article › 査読

• On‐board digital signal processing technologies for present and future SCPC systems

  Kato, H., Ohtani, K., Kohri, T., Morikura, M., Umehira, M. & Kubota, S., 1988, In: International Journal of Satellite Communications. 6, 3, p. 289-300 12 p.

  研究成果: Article › 査読

  • Demodulation 100%
  • Digital signal processing 93%
  • Satellites 70%
  • Electric power utilization 67%
  • Demodulators 55%
  2 被引用数 (Scopus)

• Viterbi Decoding and Its Applications

  Kato, S. & Kubota, S., 1988 12月 1, In: Default journal.

  研究成果: Article › 査読
• 1989

  A Compact Spectrum and Interference-resistant Digital Video Transmission System

  Kubota, S., Morikura, M., Enomoto, K. & Kato, S., 1989 11月 1, In: IEEE International Conference on Global Communications (Globecom'89).

  研究成果: Article › 査読

  3 被引用数 (Scopus)

• Application of Advanced Microelectronics to Large Scale Communication Equipment: Compact & Maintenance Free TDMA Equipment

  Kato, S., Morikura, M., Umehira, M., Enomoto, K. & Kubota, S., 1989 6月 1, In: Default journal.

  研究成果: Article › 査読

• Compact, High-speed and High-coding-gain General Purpose FEC Encoder/Decoder -NUFEC CODEC-

  Kubota, S., Kato, S., Ishitani, T. & Nagatani, M., 1989 6月 1, In: IEEE International Conference on Communications (ICC'89).

  研究成果: Article › 査読

  12 被引用数 (Scopus)

• Viterbi Decoder VLSI Implementation and Its Applications

  Kubota, S. & Kato, S., 1989 6月 1, In: Default journal.

  研究成果: Article › 査読
• 1990

  Application of Advanced Microelectronics to Large-Scale Communication Equipment—Compact and Maintenance-Free TDMA Equipment

  Kato, S., Morikura, M., Umehira, M., Enomoto, K. & Kubota, S., 1990 10月, In: IEEE Journal on Selected Areas in Communications. 8, 8, p. 1551-1564 14 p.

  研究成果: Article › 査読

  • LSI circuits 100%
  • Time division multiple access 85%
  • Microelectronics 79%
  • Communication 37%
  • Analog integrated circuits 29%
  6 被引用数 (Scopus)

• LSI and IC‐implementation of TDMA system—highly reliable and maintenance‐free TDMA equipment

  Kato, S., Morikura, M., Umehira, M., Enomoto, K. & Kubota, S., 1990, In: Electronics and Communications in Japan (Part III: Fundamental Electronic Science). 73, 4, p. 9-22 14 p.

  研究成果: Article › 査読

  • Modular construction 100%
  • Computer hardware 83%
  • Analog circuits 79%
  • Digital circuits 79%
  • Interfaces (computer) 67%

• LSI implementation scheme for general‐purpose high‐speed and coding rate viterbi decoder LSI

  Kato, S., Kubota, S., Ohtani, K., Ishitani, T. & Miyahara, N., 1990, In: Electronics and Communications in Japan (Part III: Fundamental Electronic Science). 73, 2, p. 22-32 11 p.

  研究成果: Article › 査読

  • ROM 100%
  • Error correction 84%
  • Costs 61%

• TDMA equipment for DYANET

  Kato, S., Morikura, M., Kubota, S., Enomoto, K. & Umehira, M., 1990 5月 1, In: NTT Review. 2, 3, p. 47-54 8 p.

  研究成果: Article › 査読

  • Time division multiple access 100%
  • Modems 39%
  • Synchronization 28%
  • Transponders 21%
  • Satellites 13%

• TDMA Satellite Communication Systems for ISDN Services

  Kato, S., Morikura, M., Kubota, S. & Enomoto, K., 1990 12月 1, In: Default journal.

  研究成果: Article › 査読
• 1991

  Common Transmission of High Speed QPSK Signal and SSMA Signal over Nonlinearly Amplified Transponder

  Enomoto, K., Morikura, M., Kubota, S. & Kato, S., 1991 5月 1, In: IEICE Transaction on Communications.

  研究成果: Article › 査読

• Concatenated Coding Scheme Employing Soft Decision for Outer Codes -DSD Concatenated Coding Scheme-

  Kubota, S., Honda, S., Morikura, M. & Kato, S., 1991 6月 1, In: IEEE International Conference on Communications (ICC'91).

  研究成果: Article › 査読

• DCF Reverse Modulation Type Carrier Recovery Circuit for Rician Fading Channel

  Sakai, T., Kobayashi, K., Kubota, S., Morikura, M. & Kato, S., 1991 12月 1, In: IEEE International Conference on Global Communications (Globecom'91).

  研究成果: Article › 査読

• Implementation of Coded Modems: Trellis-coded modems use DSP and LSIC technologies to deliver robust operation and high reliability from miniature hardware

  Kato, S., Morikura, M. & Kubota, S., 1991 1月 1, In: IEEE Communications Magazine. 29, 12, p. 88-97 10 p.

  研究成果: Article › 査読
  5 被引用数 (Scopus)

• New Carrier Recovery Circuit for Land Mobile Satellite Communication

  Kobayashi, K., Sakai, T., Kubota, S., Morikura, M. & Kato, S., 1991 9月 1, In: International Symposium on Personal Indoor Mobile Radio Communications (PIMRC'91).

  研究成果: Article › 査読

  3 被引用数 (Scopus)
• 1992

  A High Speed QPSK/OQPSK Digital Burst Modem for LSIC Implementation

  Seki, K., Matsumoto, Y., Kobayashi, K., Sakata, T., Morikura, M., Kubota, S. & Kato, S., 1992 12月 1, In: IEEE International Conference on Global Communications (Globecom'92). p. 422-426

  研究成果: Article › 査読

• A New Carrier Recovery Circuit for Land Mobile Satellite Communication

  Kobayashi, K., Sakai, T., Kubota, S., Morikura, M. & Kato, S., 1992 10月, In: IEEE Journal on Selected Areas in Communications. 10, 8, p. 1306-1314 9 p.

  研究成果: Article › 査読

  • Communication satellites 100%
  • Modulation 69%
  • Recovery 61%
  • Networks (circuits) 49%
  • Limiters 36%
  3 被引用数 (Scopus)

• A Superposed SSMA-QPSK Signal Transmission Scheme over High Speed QPSK Signals in Nonlinear Channels

  Sugiyama, T., Kazama, H., Morikura, M., Kubota, S. & Kato, S., 1992 12月 1, In: International Symposium on Spread Spectrum Technology (ISSSTA'92). p. 283-286

  研究成果: Article › 査読

• A TDMA Satellite Communication System for ISDN

  Kato, S., Morikura, M., Kubota, S., Kazama, H., Enomoto, K. & Umehira, M., 1992 2月 1, In: IEEE Journal on Selected Areas in Communications.

  研究成果: Article › 査読

  11 被引用数 (Scopus)

• A TDMA Satellite Communication System for ISDN Services

  Kato, S., Morikura, M., Kubota, S., Kazama, H., Enomoto, K. & Umehira, M., 1992 2月, In: IEEE Journal on Selected Areas in Communications. 10, 2, p. 456-464 9 p.

  研究成果: Article › 査読

  • Satellite communication systems 100%
  • Voice/data communication systems 95%
  • Quadrature phase shift keying 93%
  • Time division multiple access 90%
  • Modems 88%
  11 被引用数 (Scopus)

• DSD (Double Soft Decision) Concatenated FEC Scheme in Mobile Satellite Communication Systems

  Honda, S., Kubota, S. & Kato, S., 1992 10月, In: IEEE Journal on Selected Areas in Communications. 10, 8, p. 1271-1277 7 p.

  研究成果: Article › 査読

  • Satellite communication systems 100%
  • Mobile telecommunication systems 91%
  • Forward error correction 74%
  • Decoding 67%
  • Fading channels 36%
  3 被引用数 (Scopus)

• DSD Concatenated FEC Scheme in Mobile Satellite Communication Systems

  Honda, S., Kubota, S. & Kato, S., 1992 5月 1, In: International Symposium on Space Technology and Science (ISTS'92). p. .1641-1646

  研究成果: Article › 査読

• DYANET II, Satellite TDMA System for DYANET II

  Kato, K., Kato;Morikura;Kubota;Kazama;Enomoto, KMKKE. & Kubota, S., 1992 11月 1, In: NTT Review. 4, p. 53-61

  研究成果: Article › 査読

• General Purpose High-Speed Multi-Function TDMA LSIC Development

  Kazama, H., Enomoto, K., Morikura, M., Kubota, S. & Kato, S., 1992 5月 1, In: International Conference on Digital Satellite Communications (ICDSC-9). p. 63-68

  研究成果: Article › 査読

• Integrated Satellite Digital Video TDMA System for Business Video Communications

  Sugiyama, T., Kazama, H., Kubota, S., Morikura, M. & Kato, S., 1992 7月 1, In: Default journal.

  研究成果: Article › 査読

• Inter-channel Interference Cancellation Technique for CDMA Mobile/Personal Communication Base Stations

  Kubota, S., Kato, S. & Feher, K., 1992 12月 1, In: International Symposium on Spread Spectrum Technology and Its Application (ISSSTA'92).

  研究成果: Article › 査読

  5 被引用数 (Scopus)

• Inter-channel Interference Cancellation Technique for CDMA Mobile/Personal Communication Systems

  Kubota, S., Kato, S. & Feher, K., 1992 10月 1, In: International Symposium on Personal Indoor Mobile Radio Communications（PIMRC'92）.

  研究成果: Article › 査読

• Novel Satellite Digital Video TDMA System for Business Video Communications

  Kato, S., Kubota, S., Kazama, H. & Morikura, M., 1992 8月, In: IEEE Journal on Selected Areas in Communications. 10, 6, p. 1054-1065 12 p.

  研究成果: Article › 査読

  • Time division multiple access 100%
  • Code division multiple access 83%
  • Transponders 80%
  • Satellites 68%
  • Cochannel interference 63%
  6 被引用数 (Scopus)

• Superposed Transmission of High Speed QPSK Signals and SSMA-QPSK Signals in Non-linear Channels

  Morikura, M., Sugiyama, T., Kazama, H., Kubota, S. & Kato, S., 1992 12月 1, In: IEEE International Conference on Global Communications (Globecom'92). p. 727-731

  研究成果: Article › 査読

• Time Diversity CDMA Scheme for Time Varying Channels

  Kubota, S., Kato, S. & Feher, K., 1992 9月 1, In: Default journal.

  研究成果: Article › 査読

• Universal-Coding-Rate Scarce-State-Transition Viterbi Decoder

  Kawazoe, K., Honda, S., Kubota, S. & Kato, S., 1992 6月 1, In: IEEE International Conference on Communications (ICC'92).

  研究成果: Article › 査読

  2 被引用数 (Scopus)
• 1993

  A Frequency Utilization Efficiency Improvement on Superposed SSMA-QPSK Signal Transmission over High Speed QPSK Signals in Nonlinear Channels

  Sugiyama, T., Morikura, H. KM., Kubota, S. & Kato, S., 1993 5月 1, In: IEICE Transaction on Communications.

  研究成果: Article › 査読

  11 被引用数 (Scopus)

• A New Burst Coherent Demodulator for Microcellular TDMA/TDD Systems

  Matsumoto, Y., Kubota, S. & Kato, S., 1993 9月 1, In: IEEE International Symposium on Personal Indoor Mobile Radio Communications (PIMRC'93).

  研究成果: Article › 査読

• A New Coherent Detection Scheme without Feedback Loop -Open Loop Coherent Detection Scheme-

  Sakata, T., Matsumoto, Y., Kubota, S. & Kato, S., 1993 9月 1, In: IEEE International Symposium on Personal Indoor Mobile Radio Communications (PIMRC'93).

  研究成果: Article › 査読

• A New Fully-Digitalized Pi/4-Shift QPSK Modulator for Personal Communication Terminals

  Sakata, T., Seki, K., Kubota, S. & Kato, S., 1993 10月 1, In: IEEE International Conference on Universal Personal Communications (ICUPC'93). p. 926-930

  研究成果: Article › 査読

  1 被引用数 (Scopus)

• An FEC Scheme for TDMA-TDD Communication Systems in Slow Fading Channels

  Suzuki, M., Kubota, S. & Kato, S., 1993 9月 1, In: IEEE International Symposium on Personal Indoor Mobile Radio Communications (PIMRC'93).

  研究成果: Article › 査読

• A Prediction Eye-Monitoring Method for Carrier Hopping TDMA-TDD Systems

  Nagura, T., Kawazoe, K., Kubota, S. & Kato, S., 1993 9月 1, In: IEEE International Symposium on Personal Indoor Mobile Radio Communications (PIMRC'93).

  研究成果: Article › 査読

• A Suitable Combination of Modulation and FEC Schemes for Satellite Digital Video Communication Networks

  Kubota, S., Morikura, M. & Enomoto, K., 1993 5月 1, In: IEICE Transaction on Communications.

  研究成果: Article › 査読