scispace - formally typeset
H

Hiroshi Yoshida

Researcher at Tohoku University

Publications -  222
Citations -  3837

Hiroshi Yoshida is an academic researcher from Tohoku University. The author has contributed to research in topics: Signal & Amplifier. The author has an hindex of 31, co-authored 219 publications receiving 3698 citations. Previous affiliations of Hiroshi Yoshida include Toshiba.

Papers
More filters
Patent

MIMO transmission and reception methods and devices

TL;DR: In this article, a wireless transmitting device which performs transmission by an OFDM using a plurality of subcarriers orthogonal to each other is considered, where a plurality preambles to which a plurality OFDM subcarrier groups are selected are transmitted by using a multiplicity of transmit antennas.
Patent

Wireless transmitter and amplifier

TL;DR: In this paper, an amplifier consisting of first and second power amplifiers and a changeover unit is used to change over the first and the second path. But the second and third path changeover units are configured to switch over the third and fourth paths.
Patent

Frequency utilization status measuring system

TL;DR: In this paper, the frequency utilization status of a frequency band allocated to an existent wireless device such as a radar device is detected when a terminal performs cognitive communication using an external database and an internal database.
Journal ArticleDOI

A novel acid phosphatase excreted by Penicillium funiculosum that hydrolyzes both phosphodiesters and phosphomonoesters with aryl leaving groups.

TL;DR: An acid phosphatase has been purified from the culture broth of Penicillium funiculosum by procedures including SP-Sephadex column chromatography and Sephacryl S-200 gel filtration and indicates that the intermediary phosphomonoester produced on the enzyme is further hydrolyzed in situ or dissociates into the medium at approximately the same probability.