H
Hiroyuki Nakase
Researcher at Tohoku University
Publications - 44
Citations - 397
Hiroyuki Nakase is an academic researcher from Tohoku University. The author has contributed to research in topics: Spread spectrum & Antenna (radio). The author has an hindex of 11, co-authored 44 publications receiving 388 citations.
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Journal ArticleDOI
New binary sequences with zero-correlation duration for approximately synchronised CDMA
TL;DR: In this article, a generalised method for constructing binary preferred pairs with zero-correlation duration (ZCD) of (N/2 + 1) chips is proposed, which is effective for approximately synchronised (AS) CDMA systems.
Journal ArticleDOI
Relay with deflection routing for effective throughput improvement in Gbps millimeter-wave WPAN systems
Zhou Lan,Chin-Sean Sum,Junyi Wang,Tuncer Baykas,Fumihide Kojima,Hiroyuki Nakase,Hiroshi Harada +6 more
TL;DR: Inspired by the fact that the significant path loss of a millimeter-wave environment can provide good space isolation, a deflection routing scheme to improve the effective throughput by sharing time slots for direct path with relay path is proposed.
Journal ArticleDOI
Full duplex transmission operation of a 2.45-GHz asynchronous spread spectrum using a SAN convolver
TL;DR: An asynchronous spread spectrum modem in the 2.45-GHz band has been implemented using an efficient ZnO-SiO/sub 2/-Si surface acoustic wave (SAW) convolver, based on a direct-sequence/code-shift-keying (DS/CSK) method for the modulation.
Proceedings ArticleDOI
Impulse Response Model and Parameters for Indoor Channel Modeling at 60GHz
TL;DR: Channel models for each specified usage model are required and suitable impulse channel models for that purpose are proposed, which are useful in designing systems for millimeter-wave wireless communications.
Proceedings ArticleDOI
Necessary Modifications on Conventional IEEE802.15.3b MAC to Achieve IEEE802.15.3c Millimeter Wave WPAN
TL;DR: The computer simulation results show good feasibility of handling directional antenna for ultra high speed transmission and highly efficient transmission up to 87 percent over 4.094 Gbps PHY-SAP with 8PSK modulation.