H
Hiroyuki Sasai
Researcher at Panasonic
Publications - 68
Citations - 1009
Hiroyuki Sasai is an academic researcher from Panasonic. The author has contributed to research in topics: Signal & Transmission (telecommunications). The author has an hindex of 16, co-authored 68 publications receiving 1009 citations.
Papers
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Patent
Radio communication system
Kuniaki Utsumi,Hiroaki Yamamoto,Kouichi Masuda,Tsutomu Niiho,Mariko Nakaso,Tanaka Kazuo,Hiroyuki Sasai +6 more
TL;DR: In this paper, the authors present a wireless communication system capable of keeping a level of a wireless signal received by a relay apparatus (20) within a predetermined dynamic range, by adjusting the level of the wireless signal transmitted by the relay apparatus.
Patent
Optical transmission system for radio access and high frequency optical transmitter
Hiroyuki Sasai,Masaru Fuse +1 more
TL;DR: In this paper, an optical branching portion branches the intensity-modulated optical signal and respectively outputs branched optical signals to radio base stations to obtain an RF signal by frequency-converting the IF signal.
Patent
Wireless communication system
TL;DR: In this paper, a SW (70) receives an Ethernet signal from an outside of areas E and F. The SW selects and outputs the obtained Ethernet signal to any one of APs ( 91 a to 91 e ) in accordance with a network structure managed by the SW ( 70 ).
Patent
Optical space transmission system using visible light and infrared light
TL;DR: In this paper, a first modulating part that subjects a first data to a low-speed digital modulation, and a second modulating component that subjects the second data to high-speed high-frequency digital modulation was introduced.
Patent
Optical transmitter-receiver
TL;DR: In this paper, the optical receiver is constructed simply and at low cost without requiring a wideband optical/electrical converting element for converting a high frequency electrical signal and a high-frequency electrical component (a frequency converter, a demodulator, a semirigid cable or a waveguide) which is very high in cost or is difficult to process.