IEICE Trans

Tadao NAKAGAWA

Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications Doohwan LEE Hirofumi SASAKI Hiroyuki FUKUMOTO Ken HIRAGA Tadao NAKAGAWA
Publication: Publication Date: 2017/07/01 Vol. E100-B No. 7 pp. 1044-1063 Type of Manuscript: INVITED PAPER (Special Section on Smart Radio and Its Applications in Conjunction with Main Topics of SmartCom) Category: Transmission Systems and Transmission Equipment for Communications Keyword: orbital angular momentum multiplexing, uniform circular array, Gaussian beam, Bessel beam, lens antenna,
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Throughput Enhancement for SATCOM Systems Using Dynamic Spectrum Controlled Channel Allocation under Variable Propagation Conditions Katsuya NAKAHIRA Jun MASHINO Jun-ichi ABE Daisuke MURAYAMA Tadao NAKAGAWA Takatoshi SUGIYAMA
Publication: Publication Date: 2017/02/01 Vol. E100-B No. 2 pp. 390-399 Type of Manuscript: PAPER Category: Satellite Communications Keyword: satellite communication, channel allocation, resource control, adaptive coding and modulation, spectrum compression, spectrum division, demand assigned multiple access,
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Wide-Range and Fast-Tracking Non-Data-Aided Frequency Offset Estimator for QAM Optical Coherent Receivers Tadao NAKAGAWA Takayuki KOBAYASHI Koichi ISHIHARA Yutaka MIYAMOTO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/07/01 Vol. E99-B No. 7 pp. 1416-1425 Type of Manuscript: PAPER Category: Fiber-Optic Transmission for Communications Keyword: optical fiber communication, optical receivers, quadrature amplitude modulation, digital signal processing, frequency offset estimation,
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Alignment Tolerance in Multiple-Stream Transmission Using Orthogonal Directivities under Line-of-Sight Environments Maki ARAI Tomohiro SEKI Ken HIRAGA Kazumitsu SAKAMOTO Tadao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/06/01 Vol. E99-B No. 6 pp. 1362-1370 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: MIMO, directivity, spatial division, channel capacity,
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Orthogonalized Directional MIMO Transmission Using Higher Order Mode Microstrip Antennas Maki ARAI Tomohiro SEKI Ken HIRAGA Kazumitsu SAKAMOTO Hideki TOSHINAGA Tadao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/01/01 Vol. E99-B No. 1 pp. 48-57 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas, Propagation and Wireless Systems Related to Topics in ISAP2014) Category: Antennas and Propagation Keyword: MIMO, directivity, higher order mode, capacity,
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Concurrent Multi-Band Mixer with Independent and Linear Gain Control Takana KAHO Yo YAMAGUCHI Hiroyuki SHIBA Tadao NAKAGAWA Kazuhiro UEHARA Kiyomichi ARAKI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2015/07/01 Vol. E98-C No. 7 pp. 659-668 Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology) Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits Keyword: concurrent multi-band mixer, dual-band, triple-band, SiGe BiCMOS, flexible wireless system,
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Experimental Validation of Digital Pre-distortion Technique for Dual-band Dual-signal Amplification by Single Feedback Architecture Employing Dual-band Mixer Ikuma ANDO Gia Khanh TRAN Kiyomichi ARAKI Takayuki YAMADA Takana KAHO Yo YAMAGUCHI Tadao NAKAGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2015/03/01 Vol. E98-C No. 3 pp. 242-251 Type of Manuscript: PAPER Category: Electromagnetic Theory Keyword: User Centric Wireless Network, nonlinear power amplifiers, spectral regrowth, digital predistortion, dual-band mixer,
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Spatial Division Transmission without Signal Processing for MIMO Detection Utilizing Two-Ray Fading Ken HIRAGA Kazumitsu SAKAMOTO Maki ARAI Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/11/01 Vol. E97-B No. 11 pp. 2491-2501 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: spatial division transmission, array a ntennas, parallel transmission, line-of-sight (LOS), two-ray ground reflection model, reflection coefficient, polarization,
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A Study of Short-Range MIMO Transmission Utilizing Polarization Multiplexing for the Simplification of Decoding Ken HIRAGA Kazumitsu SAKAMOTO Kentaro NISHIMORI Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/02/01 Vol. E97-B No. 2 pp. 459-468 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: short-range, MIMO, polarization multiplexing, XPD, antennas, decoding,
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Performance Evaluation of Short-Range MIMO Using a Method for Controlling Phase Difference between Each Propagation Channel Kazumitsu SAKAMOTO Ken HIRAGA Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/10/01 Vol. E96-B No. 10 pp. 2513-2520 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012) Category: Adaptive Array Antennas/MIMO Keyword: short-range MIMO, controlling phase difference, power ratio, sub-array antenna, millimeter-wave, simple decoding method,
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A Band-Divided Receiver Prototype for Wideband Optical Signals Munehiro MATSUI Riichi KUDO Yasushi TAKATORI Tadao NAKAGAWA Koichi ISHIHARA Masato MIZOGUCHI Takayuki KOBAYASHI Yutaka MIYAMOTO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2011/07/01 Vol. E94-B No. 7 pp. 1801-1808 Type of Manuscript: Special Section PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network) Category: Keyword: coherent receiver, analog to digital converter, OFDM, real-time, heterodyne receiver,
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An Analysis of Multi-Layer Inductors for Miniaturizing of GaAs MMIC Yo YAMAGUCHI Takana KAHO Motoharu SASAKI Kenjiro NISHIKAWA Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA Kiyomichi ARAKI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/07/01 Vol. E93-C No. 7 pp. 1119-1125 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies) Category: Keyword: multi-layer inductor, stacked inductor, three-dimensional MMIC, GaAs,
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A Miniaturized In-Phase Power Divider with a DC Block Function Hitoshi HAYASHI Tadao NAKAGAWA Kazuhiro UEHARA Yoshihiro TAKIGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/10/01 Vol. E90-C No. 10 pp. 2022-2029 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: in-phase, power, divider, miniaturized, DC block,
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Miniaturized Broadband Lumped-Element In-Phase Power Dividers Hitoshi HAYASHI Tadao NAKAGAWA Kazuhiro UEHARA Yoshihiro TAKIGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/06/01 Vol. E90-C No. 6 pp. 1222-1227 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: in-phase, power, divider, miniaturized, lumped-element, broadband,
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An Active Terminal Circuit and Its Application to a Distributed Amplifier Hitoshi HAYASHI Munenari KAWASHIMA Tadao NAKAGAWA Kazuhiro UEHARA Yoshihiro TAKIGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/06/01 Vol. E90-C No. 6 pp. 1203-1208 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: distributed, amplifier, cascode-connected, Darlington pair,
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A Novel Adaptive Linearization Technique for a Balanced-Amplifier Array Takana KAHO Yo YAMAGUCHI Tadao NAKAGAWA Katsuhiko ARAKI Kiyomichi ARAKI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2006/10/01 Vol. E89-C No. 10 pp. 1448-1453 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: adaptive linearization, linearizer, multi-port amplifier, power amplifiers, array antenna,
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A Monolithic Linearizer Using an Even-Order-Distortion Controller for an S-Band High Power Amplifier Takana KAHO Hiroshi OKAZAKI Tadao NAKAGAWA Katsuhiko ARAKI Kohji HORIKAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2002/12/01 Vol. E85-C No. 12 pp. 1959-1966 Type of Manuscript: Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology) Category: Keyword: linearizer, amplifier, GaAs MMIC, satellite communication,
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A 0.9-2.6 GHz Broadband RF Front-End Chip-Set with a Direct Conversion Architecture Munenari KAWASHIMA Tadao NAKAGAWA Hitoshi HAYASHI Kenjiro NISHIKAWA Katsuhiko ARAKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2002/12/01 Vol. E85-B No. 12 pp. 2732-2740 Type of Manuscript: Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications) Category: Keyword: RF front-end, direct conversion architecture, quadrature mixer, local oscillator, low-noise variable gain amplifier,
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A Phase Interpolation Direct Digital Synthesizer with a Symmetrically Structured Delay Generator Hideyuki NOSAKA Tadao NAKAGAWA Akihiro YAMAGISHI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1999/07/25 Vol. E82-C No. 7 pp. 1067-1072 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology) Category: Active Devices and Circuits Keyword: direct digital synthesizer, frequency synthesizer, delay generator, spread spectrum, jitter elimination,
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A Fast Frequency Switching Synthesizer with a Digitally Controlled Delay Generator Hideyuki NOSAKA Tadao NAKAGAWA Akihiro YAMAGISHI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/07/25 Vol. E81-A No. 7 pp. 1466-1472 Type of Manuscript: Special Section PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network) Category: Keyword: direct digital synthesizer, frequency synthesizer, low power, spread spectrum, frequency hopping, spurious signals,
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A High-Efficiency Linear Power Amplifier with a Novel Output Power Control Technique Yo YAMAGUCHI Masahiro MURAGUCHI Tadao NAKAGAWA Masashi NAKATSUGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1998/06/25 Vol. E81-C No. 6 pp. 892-897 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology) Category: Semiconductor Devices and Amplifiers Keyword: high efficiency, linear, output power control, power amplifier, mobile communication,
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A Novel Optical Control Technique Using Tunable Inductance Circuits Hitoshi HAYASHI Masashi NAKATSUGAWA Tadao NAKAGAWA Masahiro MURAGUCHI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1998/02/25 Vol. E81-C No. 2 pp. 299-304 Type of Manuscript: PAPER Category: Microwave and Millimeter Wave Technology Keyword: optical, control, tunable, inductance, circuit,
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A 2.7-V Quasi-Microwave Si-Bipolar Quadrature Modulator without Tuning Tsuneo TSUKAHARA Tadao NAKAGAWA Masahiro MURAGUCHI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/02/25 Vol. E80-A No. 2 pp. 349-352 Type of Manuscript: Special Section LETTER (Special Section on Analog Circuit Techniques for System-on-Chip Integration) Category: Keyword: Si bipolar, quadrature modulator, quasi-microwave, digital mobile communication,
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Low-Noise MMIC Phase-Locked Oscillators Using an EXOR and a PFC Tadao NAKAGAWA Hideo SUWAKI Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/06/25 Vol. E76-C No. 6 pp. 950-954 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions) Category: Keyword: phase noise, MMIC, PLO, PFC, EXOR,
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A GaAs Monolithic Sampling Phase Frequency Comparator for Extending the Pull-In Range of Microwave Phase-Locked Oscillators Tadao NAKAGAWA Tetsuo HIROTA Takashi OHIRA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/06/25 Vol. E76-C No. 6 pp. 944-949 Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions) Category: Keyword: sampling, phase frequency comparator, MMIC, Ku-band, pull-in range,
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