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Dive into the research topics where Yasuo Harada is active.

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Featured researches published by Yasuo Harada.


consumer communications and networking conference | 2004

A QoS scheduler for IEEE 802.11e WLANs

L.W. Lim; Rahul Malik; Pek Yew Tan; Chalermphol Apichaichalermwongse; Kazuhiro Ando; Yasuo Harada

The paper introduces the application of IEEE 802.11e to the delivery of high bandwidth multimedia streams. The architecture for a QoS enabled MAC is described along with an efficient scheduling algorithm, which, when deployed at the AP, is able to serve QoS sensitive streams, while making efficient use of the channel bandwidth. The 802.11e MAC is simulated using OPNET and the performance of both the EDCA (enhanced distributed channel access) and the HCCA (HCF controlled channel access) mechanisms is studied under various scenarios. The results illustrate that HCCA when used in conjunction with the QoS scheduler satisfies the requirements of AV and speech applications.


Archive | 1999

Modulator, demodulator, and transmission system for use in OFDM transmission

Naganori Shirakata; Yasuo Harada; Hiroshi Hayashino; Koichiro Tanaka; Hideki Nakahara


Archive | 1996

Method of transmitting orthogonal frequency division multiplexing signal and receiver thereof

Yasuo Harada; Tomohiro Kimura; Hiroshi Oue; Yasuo Nagaishi; Hiroshi Hayashino; Yasuhiro Uno


Archive | 2002

Methods for ensuring medium access in a wireless network

Tan Pek Yew; Wei Lih Lim; Shinichiro Ohmi; Yasuo Harada


Archive | 1995

Method of transmitting orthogonal frequency division multiplex signal, and transmitter and receiver employed therefor

Hiroshi Hayashino; Yasuo Harada; Tomohiro Kimura; Yasuhiro Uno; Hiroshi Oue


Archive | 2004

Method for transmitting data stream via wireless medium and a wireless network

Yasuo Harada; Kazuhiro Ando; Chalermphol Apichaichalermwongse; Pek Yew Tan; Wei Lih Lim; Rahul Malik


Archive | 2000

Apparatus and method of OFDM demodulation

Naganori Shirakata; Tomohiro Kimura; Koichiro Tanaka; Hideki Nakahara; Yasuo Harada; Shuya Hosokawa


Archive | 2000

OFDM signal transmission scheme, and OFDM signal transmitter/receiver

Hideki Nakahara; Koichiro Tanaka; Naganori Shirakata; Tomohiro Kimura; Yasuo Harada


Archive | 2004

Diversity receiving apparatus and wireless receiving apparatus using the same

Naganori Shirakata; Tomohiro Kimura; Shuya Hosokawa; Yasuo Harada


Archive | 2004

FREQUENCY SYNCHRONIZATION APPARATUS AND FREQUENCY SYNCHRONIZATION METHOD

Yukihiro Omoto; Naganori Shirakata; Yoshio Urabe; Yasuo Harada

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