Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Ken Hiraga"'
Publikováno v:
IEICE Transactions on Communications. :1044-1063
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fb46186e8eb49e4c5051b636919ddcc
https://doi.org/10.1587/transcom.2016sci0001
https://doi.org/10.1587/transcom.2016sci0001
Publikováno v:
IEICE Communications Express. 6:405-410
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc061bd0d5c36e930476f5503e5dd98b
https://doi.org/10.1587/comex.2016xbl0213
https://doi.org/10.1587/comex.2016xbl0213
Publikováno v:
IEICE Transactions on Communications. :48-57
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4d630c98639ec870484f6e074482d4f
https://doi.org/10.1587/transcom.2015isp0013
https://doi.org/10.1587/transcom.2015isp0013
Publikováno v:
2018 Asia-Pacific Microwave Conference (APMC).
In this paper, the authors investigate influence of the number of radiation beams and channel capacity given by their beam width in femtocell base station (BS) system assuming millimeter wave communication. This system radiates multiple beams from on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e68b33fe9eb95e691c6a96920cd22a3b
https://doi.org/10.23919/apmc.2018.8617305
https://doi.org/10.23919/apmc.2018.8617305
Autor:
Kazumitsu Sakamoto, Tomohiro Seki, Ken Hiraga, Hideki Toshinaga, Tadao Nakagawa, Maki Arai, Toshimitsu Tsubaki
Publikováno v:
IEEE Wireless Communications Letters. 4:557-560
Millimeter-wave short-range multiple-input multiple-output (SR-MIMO) transmission employing zero-forcing beamforming (ZF-BF) at the information kiosk side can improve transmission rate without increasing mobile terminal power consumption for MIMO sig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::344f15f3670cbed181d7a7bf81683ace
https://doi.org/10.1109/lwc.2015.2459693
https://doi.org/10.1109/lwc.2015.2459693
Autor:
Tomohiro Seki, Kazumitsu Sakamoto, Ken Hiraga, Hideki Toshinaga, Tadao Nakagawa, Kazuhiro Uehara, Maki Arai
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 14:56-59
Using ray-tracing propagation calculation, we clarify the dependency on antenna element beamwidth of the channel capacity of a spatial division (SD) transmission method utilizing the characteristics of two-ray fading. It was clarified that the SD tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::834283f622ff3dcd95a72bdbe4d1ab58
https://doi.org/10.1109/lawp.2014.2355258
https://doi.org/10.1109/lawp.2014.2355258
Publikováno v:
2017 IEEE Asia Pacific Microwave Conference (APMC).
In this paper, we describe a beamforming network we propose that is based on a 3-dimensional (3D) Luneburg lens to generate multiple beams for 2-dimensional space division multiple transmission. This will enable the development of future high-speed a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::942a67b453c9414d141f4dedd63f6c00
https://doi.org/10.1109/apmc.2017.8251378
https://doi.org/10.1109/apmc.2017.8251378
Autor:
Ryochi Kataoka, Naoki Honma, Takefumi Hiraguri, Ken Hiraga, Kentaro Nishimori, Tomohiro Seki, Hideo Makino
Publikováno v:
IEICE transactions on communications. (3):620-630
A novel analog decoding method using only 90-degree phase shifters is proposed to simplify the decoding method for short-range multiple-input multiple-output (MIMO) transmission. In a short-range MIMO transmission, an optimal element spacing that max
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c024996047cc406e239fd15dd390cf3
https://niigata-u.repo.nii.ac.jp/records/1765
https://niigata-u.repo.nii.ac.jp/records/1765
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 13:126-129
A spatial division (SD) transmission method utilizing the characteristics of two-ray fading due to ground reflection with linear antenna arrays horizontal to the ground is proposed. Formulations of the optimum array arrangements as functions of the t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d75d29ba21a0ea20a03c4ae4d22d9bc
https://doi.org/10.1109/lawp.2013.2297379
https://doi.org/10.1109/lawp.2013.2297379
Publikováno v:
IEICE Communications Express. 3:131-137
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbb52069cfee009949eac4c5296724f2
https://doi.org/10.1587/comex.3.131
https://doi.org/10.1587/comex.3.131