Výsledky vyhledávání - "Shigekazu Kimura"

How to Design an Outphasing Power Amplifier with Digital Predistortion

Autor: Shigekazu Kimura, Toshio Kawasaki

Publikováno v: IEICE Transactions on Electronics. :472-479

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8fa2292993ec8349680f803e7ec3f49
https://doi.org/10.1587/transele.2021mmi0006

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A Novel Multi-Band Look-Up Table Based Digital Predistorter with a Single Common Feedback Loop

Autor: Hiroyoshi Ishikawa, Ken Tamanoi, Masahiko Shimizu, Tomoya Ota, Toshio Kawasaki, Shigekazu Kimura, Toru Maniwa

Publikováno v: 2018 Asia-Pacific Microwave Conference (APMC).

This paper proposes a novel adaptive multi-band look-up table (LUT)-based digital predistorter (DPD) with a single common feedback loop for concurrent multi-band power amplifiers (PAs). The proposed DPD reduces the total complexity to one-hundredth b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4054bdc517230dcc46966c103b4ff27
https://doi.org/10.23919/apmc.2018.8617473

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An Experimental Study on Reduced-Complexity Multi-Band Digital Predistorter with a Single Common Feedback Loop

Autor: Toru Maniwa, Masahiko Shimizu, Makoto Yoshida, Shigekazu Kimura, Tomoya Ota, Ken Tamanoi, Toshio Kawasaki

Publikováno v: PIMRC

This paper proposes how to modify the reduced-complexity multi-band digital predistorter (DPD) with a single common feedback loop we previously proposed, in order to compensate for nonlinear distortions significantly where imperfection of the analog

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a70c070b3d734b1a2302d6620baa7b55
https://doi.org/10.1109/pimrc.2018.8581002

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A reduced complexity digital predistorter with a single common feedback loop for concurrent multi-band power amplifiers

Autor: Toru Maniwa, Toshio Kawasaki, Makoto Yoshida, Shigekazu Kimura, Ken Tamanoi, Tomoya Ota

Publikováno v: 2017 IEEE Asia Pacific Microwave Conference (APMC).

This paper proposes a reduced complexity digital predistorter (DPD) with a single common feedback loop for concurrent multi-band power amplifiers (PAs). Some multi-band DPD schemes with a single common feedback loop have been proposed; however the co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ca118adb855aa0d26277104a26f932b
https://doi.org/10.1109/apmc.2017.8251516

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A novel digital predistorter compensating for even order distortions of concurrent multiband power amplifiers with a single common feedback loop

Autor: Ken Tamanoi, Toru Maniwa, Tomoya Ota, Shigekazu Kimura, Toshio Kawasaki, Makoto Yoshida

Publikováno v: PIMRC

This paper proposes a novel scheme of digital predistorter (DPD) that can concurrently compensate for both the odd-order distortions and the even-order distortions for concurrent multi-band power amplifiers (PAs) at low super high frequency (SHF) and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::516aba5661494cca58bbf1d2e6cee661
https://doi.org/10.1109/pimrc.2017.8292178

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Design of Predistorter with Efficient Updating Algorithm of Power Amplifier with Memory Effect

Autor: Daisuke Takago, Yasuyuki Oishi, Shigekazu Kimura, Fukuda Eisuke, Yoshimasa Daido, Takeshi Takano, Kiyomichi Araki

Publikováno v: IEICE Transactions on Electronics. :382-394

This paper describes a method to design a predistorter (PD) for a GaN-FET power amplifier (PA) by using nonlinear parameters extracted from measured IMD which has asymmetrical peaks peculiar to a memory effect with a second-order lag. While, computat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44f699249b37abfe928719ec60023d8c
https://doi.org/10.1587/transele.e95.c.382

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Iterative Determination of Phase Reference in IMD Measurement to Characterize Nonlinear Behavior, and to Derive Inverse, for Power Amplifier with Memory Effect

Autor: Takeshi Takano, Shigekazu Kimura, Kiyomichi Araki, Fukuda Eisuke, Yasuyuki Oishi, Yoshimasa Daido

Publikováno v: IEICE Transaction on Electronics. (No. 10):1515-1523

To reduce laborious tasks of the phase determination, our previous paper has proposed a method to derive phase reference for two-tone intermodulation distortion (IMD) measurement of a power amplifier (PA) by using small-signal S-parameters. Since the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5ebeba5c26bba5d427386d2cb6c2b61
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100630842

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Efficient Method to Measure IMD of Power Amplifier with Simplified Phase Determination Procedure to Clarify Memory Effect Origins

Autor: Fukuda Eisuke, Kazuo Nagatani, Yasuyuki Ohishi, Takeshi Takano, Michiharu Nakamura, Shigekazu Kimura, Kiyomichi Araki, Yoshimasa Daido

Publikováno v: IEICE Transactions on Electronics. :991-999

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb3154825ff2dfadf59925edbf5e0402
https://doi.org/10.1587/transele.e93.c.991

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Spectrophotometric Determination of Molybdenum by Solvent Extraction with Tris(1, 10-phenanthroline)iron(II) Chelate Cation

Autor: Shigekazu Kimura, Susumu Miura, Yasuhisa Hayashi, Yuroku Yamamoto, Takahiro Kumamaru

Publikováno v: Nippon kagaku zassi. 91:354-358

水溶液中に存在する微量のニッケルはシアン化物イオンが共存すればシアノ錯陰イオンとなり,適量のトリス(1,10-フェナントロリン)鉄(II)キレート陽イオンとともに選択的にニトロベンゼ�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c258100a5619fdb4011c5c4394e3e308
https://doi.org/10.1246/nikkashi1948.91.4_354

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