A New Transmit Diversity Technique for FSK Exploiting its Orthogonality

Autor: Masatsugu Higashinaka, Yuta Hori, Hiroshi Aruga, Akinori Nakajima

Publikováno v: IEEE Communications Letters. 25:3094-3098

We propose a new transmit diversity technique for frequency shift keying (FSK). The main idea behind our proposed scheme is to exploit the orthogonality between FSK carriers in order to render signals transmitted from different antennas orthogonal at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::15b948b3b0d814318ed0b6844499726f
https://doi.org/10.1109/lcomm.2021.3089709

Efficient Power Control for Satellite-Borne Batteries Using Q-Learning in Low-Earth-Orbit Satellite Constellations

Autor: Hiroshi Aruga, Shigenori Tani, Kazuma Kaneko, Shigeru Uchida, Hikaru Tsuchida, Yuichi Kawamoto, Nei Kato

Publikováno v: IEEE Wireless Communications Letters. 9:809-812

Recently, changes in the relationship between satellite communication networks and ground communication networks have led to an increase in the demands imposed on satellite communication networks. In this category of networks, the low earth orbit (LE

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::481abafbb3c8a8ba295bb37ea70b3953
https://doi.org/10.1109/lwc.2020.2970711

Efficient Optical Alignment Technique for Compact 100 and 400 GbE TOSAs With Integrated Multiplexing With Free Space Optics

Autor: Keita Mochizuki, Tadashi Murao, Hiroshi Aruga, Kiyotomo Hasegawa, Mizuki Shirao, Kazutaka Ikeda

Publikováno v: Journal of Lightwave Technology. 37:799-807

An efficient and low-cost optical alignment technique is established for the first time for compact transmitter optical sub-assemblies (TOSAs) with an integrated multiplexer based on free space optics (FSO) for 100 and 400 Gbps Ethernet (GbE) applica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bf8defff4417cd9c5b4a652374cc85c1
https://doi.org/10.1109/jlt.2018.2881257

Beam pattern optimization based on up/downlink information for multibeam satellite communication systems

Autor: Hiroshi Aruga, Shigeru Uchida, Kazuma Kaneko, Shigenori Tani

Publikováno v: Advances in Communications Satellite Systems: Proceedings of the 37th International Communications Satellite Systems Conference (ICSSC-2019) ISBN: 9781839531453

To reduce the cost of satellite communications, it is important to minimize the number of beams by arranging the beams so as to suit the traffic load. Although a nonuniform beam pattern optimization method controlled by digital beam forming (DBF) has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f63bf4151054c861bf02eecdaebdf06f
https://doi.org/10.1049/pbte095e_ch46

FOREWORD

Autor: Hiroshi ARUGA

Publikováno v: IEICE Transactions on Electronics. :617-618

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aadbcd640503fc95c266fadccc0b6f46
https://doi.org/10.1587/transele.2019ocf0001