• 538 Citations
  • 12 h-Index
1988 …2019

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Article
2016

High-capacity wireless access networks using 920MHz band for wide-area IoT/M2M services

Akabane, K., Mochizuki, N., Teruhi, S., Kobayashi, M., Yoshino, S., Shimizu, M. & Uehara, K., Sep 1 2016, In : IEICE Transactions on Communications. E99B, 9, p. 1920-1929 10 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Radio spectrum transmission using compressed sensing for a flexible wireless system

Lee, D., Yamada, T., Shiba, H., Yamagu-Chi, Y., Nakagawa, T. & Uehara, K., May 1 2016, In : Journal of the Institute of Electronics, Information and Communication Engineers. 99, 5, p. 450-455 6 p.

Research output: Contribution to journalArticle

2015

Concurrent multi-band mixer with independent and linear gain control

Kaho, T., Yamaguchi, Y., Shiba, H., Nakagawa, T., Uehara, K. & Araki, K., Jul 1 2015, In : IEICE Transactions on Electronics. E98C, 7, p. 659-668 10 p.

Research output: Contribution to journalArticle

Dependency on beamwidth in an SD method utilizing two-ray fading characteristics

Hiraga, K., Sakamoto, K., Arai, M., Seki, T., Toshinaga, H., Nakagawa, T. & Uehara, K., Jan 29 2015, In : IEEE Antennas and Wireless Propagation Letters. 14, p. 56-59 4 p., 6891136.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2014

An SD method utilizing null dependency on transmission distance due to two-ray fading

Hiraga, K., Sakamoto, K., Arai, M., Seki, T., Nakagawa, T. & Uehara, K., Feb 24 2014, In : IEEE Antennas and Wireless Propagation Letters. 13, p. 126-129 4 p., 6701188.

Research output: Contribution to journalArticle

3 Citations (Scopus)

A study of short-range MIMO transmission utilizing polarization multiplexing for the simplification of decoding

Hiraga, K., Sakamoto, K., Nishimori, K., Seki, T., Nakagawa, T. & Uehara, K., Jan 1 2014, In : IEICE Transactions on Communications. E97-B, 2, p. 459-468 10 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Spatial division transmission without signal processing for MIMO detection utilizing two-ray fading

Hiraga, K., Sakamoto, K., Arai, M., Seki, T., Nakagawa, T. & Uehara, K., Nov 1 2014, In : IEICE Transactions on Communications. E97B, 11, p. 2491-2501 11 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Study on MIMO transmission using orthogonal directivities obtained from higher order microstrip antenna modes

Arai, M., Seki, T., Hiraga, K., Sakamoto, K., Toshinaga, H., Nakagawa, T. & Uehara, K., Mar 27 2014, In : Electronics Letters. 50, 7, p. 562-564 3 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Theoretical and experimental analysis of spatial division using antenna directivities in short-range MIMO transmission

Arai, M., Seki, T., Hiraga, K., Nakagawa, T. & Uehara, K., Jan 16 2014, In : Electronics Letters. 50, 2, p. 65-67 3 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2013

An SDM method utilizing height pattern due to two-ray fading characteristics

Hiraga, K., Sakamoto, K., Arai, M., Seki, T., Nakagawa, T. & Uehara, K., Dec 1 2013, In : IEEE Antennas and Wireless Propagation Letters. 12, p. 1622-1626 5 p., 6680603.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Nonlinear modeling and analysis on concurrent amplification of dual-band gaussian signals

Ando, I., Tran, G. K., Araki, K., Yamada, T., Kaho, T., Yamaguchi, Y. & Uehara, K., Oct 2013, In : IEICE Transactions on Electronics. E96-C, 10, p. 1254-1262 9 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Performance evaluation of short-range MIMO using a method for controlling phase difference between each propagation channel

Sakamoto, K., Hiraga, K., Seki, T., Nakagawa, T. & Uehara, K., Oct 2013, In : IEICE Transactions on Communications. E96-B, 10, p. 2513-2520 8 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2012

Effectiveness of short-range MIMO using dual-polarized antenna

Hiraga, K., Seki, T., Nishimori, K. & Uehara, K., Jan 2012, In : IEICE Transactions on Communications. E-95-B, 1, p. 87-96 10 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Signal separation and reconstruction method for simultaneously received multi-system signals in flexiblewireless system

Yamada, T., Lee, D., Shiba, H., Yamaguchi, Y., Akabane, K. & Uehara, K., Apr 2012, In : IEICE Transactions on Communications. E95-B, 4, p. 1085-1092 8 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2011

A low-noise, high-gain quasi-millimeter-wave receiver MMIC with a very high degree of integration using 3D-MMIC technology

Kaho, T., Yamaguchi, Y., Uehara, K. & Araki, K., Oct 2011, In : IEICE Transactions on Electronics. E94-C, 10, p. 1548-1556 9 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Compressed sensing technology for flexible wireless system

Lee, D., Yamada, T., Shiba, H., Yamaguchi, Y. & Uehara, K., Mar 1 2011, In : NTT Technical Review. 9, 3

Research output: Contribution to journalArticle

2 Citations (Scopus)
2010

An analysis of multi-layer inductors for miniaturizing of GaAs MMIC

Yamaguchi, Y., Kaho, T., Sasaki, M., Nishikawa, K., Seki, T., Nakagawa, T., Uehara, K. & Araki, K., Jul 2010, In : IEICE Transactions on Electronics. E93-C, 7, p. 1119-1125 7 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Combined Nyquist and compressed sampling method for radio wave data compression of a heterogeneous network system

Lee, D., Yamada, T., Shiba, H., Yamaguchi, Y. & Uehara, K., Dec 2010, In : IEICE Transactions on Communications. E93-B, 12, p. 3238-3247 10 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)
2009

Towards ultrahigh-speed high-capacity networks

Jinno, M., Kimura, H., Hibino, Y., Uehara, K., Kukutsu, N., Ito, F. & Matsuoka, S., May 1 2009, In : NTT Technical Review. 7, 5

Research output: Contribution to journalArticle

11 Citations (Scopus)
2008

A very low spurious X-band frequency quadrupler with very high integration using 3D-MMIC technology

Yamaguchi, Y., Kaho, T. & Uehara, K., Nov 2008, In : IEICE Transactions on Electronics. E91-C, 11, p. 1744-1750 7 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Performance evaluation of an autonomous adaptive base station that supports multiple wireless network systems

Akabane, K., Shiba, H., Matsui, M. & Uehara, K., Jan 1 2008, In : IEICE Transactions on Communications. E91-B, 1, p. 22-28 7 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2005

IEEE 802.11 wireless LAN implemented on software defined radio with hybrid programmable architecture

Shono, T., Shirato, Y., Shiba, H., Uehara, K., Araki, K. & Umehira, M., Sep 1 2005, In : IEEE Transactions on Wireless Communications. 4, 5, p. 2299-2308 10 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)
2003

Adaptability Check during Software Installation in Software Defined Radio

Suzuki, Y., Harada, H., Uehara, K., Fujii, T., Yokoyama, Y., Oda, K. & Hidaka, R., Dec 2003, In : IEICE Transactions on Communications. E86-B, 12, p. 3401-3407 7 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2002

Software defined radio prototype for PHS and IEEE 802.11 wireless LAN

Shiba, H., Shono, T., Shirato, Y., Toyoda, I., Uehara, K. & Umehira, M., Dec 2002, In : IEICE Transactions on Communications. E85-B, 12, p. 2694-2702 9 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)
2001

Proposal for system diversity on software defined radio

Shono, T., Uehara, K. & Kubota, S., Sep 2001, 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)

Standardization activities for software defined radio

Nakatsugawa, M., Sugita, M. & Uehara, K., Jan 1 2001, In : NTT R and D. 50, 1, p. 57-62 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Trends in the research and development of software radio

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

Research output: Contribution to journalArticle

1 Citation (Scopus)
1999

Proposal for a novel beam combination method for indoor high-speed wireless communication systems

Uehara, K., Takatori, Y. & Kagoshima, K., Dec 1 1999, In : IEEE Transactions on Vehicular Technology. 48, 5, p. 1511-1517 7 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)
14 Citations (Scopus)
1998
3 Citations (Scopus)
1996

30-GHz multibeam antenna using bi-layer butler matrix circuits

Seki, T., Uehara, K. & Kagoshima, K., Dec 1 1996, In : IEICE Transactions on Communications. E79-B, 12, p. 1778-1783 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Planar sector antenna for indoor high-speed wireless communication systems

Uehara, K., Seki, T. & Kagoshima, K., Dec 1 1996, In : IEICE Transactions on Communications. E79-B, 12, p. 1773-1777 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
1994

Rigorous analysis of microstrip phased array antennas using a new FDTD method

Uehara, K. & Kagoshima, K., Jan 1 1994, In : Electronics Letters. 30, 2, p. 100-101 2 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)
1993

FDTD method analysis of mutual coupling between microstrip antennas

Uehara, K. & Kagoshima, K., Jul 1 1993, In : IEICE Transactions on Communications. E76-B, 7, p. 762-764 3 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Optics design for a millimeter‐wave phase‐imaging system and its application to plasma diagnostics

Uehara, K., Yonekura, T., Nishimura, H., Miyashita, K. & Mizuno, K., 1993, In : Electronics and Communications in Japan (Part I: Communications). 76, 12, p. 103-112 10 p.

Research output: Contribution to journalArticle

Optimum design of yagi‐uda antenna for millimeter‐wave imaging

Uehara, K., Nishimura, H., Yonekura, T., Natsume, KI. I. & Mizuno, K., 1993, In : Electronics and Communications in Japan (Part I: Communications). 76, 4, p. 81-90 10 p.

Research output: Contribution to journalArticle

1992

Lens-Coupled Imaging Arrays for the Millimeter-and Submillimeter-Wave Regions

Uehara, K., Miyashita, K., Natsume, K. I., Hatakeyama, K. & Mizuno, K., May 1992, In : IEEE Transactions on Microwave Theory and Techniques. 40, 5, p. 806-811 6 p.

Research output: Contribution to journalArticle

49 Citations (Scopus)
1991

Millimeter-wave phase-imaging interferometer for the GAMMA 10 tandem mirror

Hattori, K., Mase, A., Itakura, A., Inutake, M., Miyoshi, S., Uehara, K., Yonekura, T., Nishimura, H., Miyashita, K. & Mizuno, K., Dec 1 1991, In : Review of Scientific Instruments. 62, 12, p. 2857-2861 5 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Yagi-uda array for millimetre-wave imaging

Mizuno, K., Uehara, K., Nishimura, H., Yonekura, T. & Suzuki, T., Sep 12 1991, In : Electronics Letters. 27, 2, p. 108-109 2 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)