H
Hiroshi Harada
Researcher at Kyoto University
Publications - 374
Citations - 2672
Hiroshi Harada is an academic researcher from Kyoto University. The author has contributed to research in topics: Wireless & Cognitive radio. The author has an hindex of 24, co-authored 354 publications receiving 2485 citations. Previous affiliations of Hiroshi Harada include Denso & National Institute of Information and Communications Technology.
Papers
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Proceedings ArticleDOI
An Implementable Channel and CFO Estimation Scheme for IEEE 802.22-Based Radio Equipment
TL;DR: A simplified channel and CFO estimation scheme that can estimate channel variations symbol by symbol with using a frame preamble and several pilot subcarriers in each symbol is proposed and can be used in the long-delay multi-path fading environment.
Journal ArticleDOI
Coexistence of Dynamic Spectrum Access Based Heterogeneous Networks
TL;DR: An analytical model for the time slot allocation among heterogeneous SU networks is developed using the approximation to the distribution of a weighted sum of chi-square random variables (RVs), which leads to an efficient spectrum usage among SUs and a minimized negative influence to the PUs.
Proceedings ArticleDOI
Compact IEEE 802.22-based radio equipment enabling easy installation for regional area network system using TV white-spaces
TL;DR: A compact and lightweight IEEE 802.22-based radio equipment is prototype by applying mixed design using an FPGA and a DSP to comply with the strict spectrum limitations by some leading countries.
Proceedings ArticleDOI
High linearity SiGe-MMIC Q-MOD having self mixer current control circuit with output power detector for 0.4–5.8GHz cognitive radio transceiver
TL;DR: A 0.4-5.8 GHz high linearity SiGe-MMIC quadrature-modulator (Q-MOD) having a novel self mixer current control circuit, which consists of an output power detector and an envelope current feedback circuit, is described, and it automatically controls the mixer current according to the output power level.
Proceedings ArticleDOI
Detection and Identification of NBI for Multichannel UWB Autocorrelation Receivers
TL;DR: An NBI detection and its center frequency identification method for multichannel autocorrelation receivers (AcR) as used by transmitted-reference (TR) UWB systems is proposed and the performance of the method is evaluated by computer simulations.