MAC protocol for ad hoc networks using smart antennas for mitigating hidden and deafness problems
Jing Ma, Hiroo Sekiya, Atsushi Nagasaki, Nobuyoshi Komuro, Shiro Sakata
IEICE Transactions on Communications, vol.E95-B, no.11, pp.3545-3555, Nov. 2012.
[Abstract | pdf]

Particle swarm optimization for design of class-E amplifier
Yuichi Tanji, Haruna Matsushita, and Hiroo Sekiya
Nonlinear Theory and Its Applications, IEICE Journal, vol.3, no.4, pp.586-595, Oct. 2012.
[Abstract | pdf]

Design of class-E_M oscillator with second harmonic injection
Ryosuke Miyahara, Xiuqin Wei, Tomoharu Nagashima, Takuji Kousaka, and Hiroo Sekiya
IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.59, no.10, pp.2456-2467, Oct. 2012.
[Abstract | pdf]

Push-pull class-E_M power amplifier for low harmonic-contents and high output-power applications
Xiuqin Wei, Shingo Kuroiwa, Tomoharu Nagashima, Marian K. Kazimierczuk, and Hiroo Sekiya
IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.59, no.9, pp.2137-2146 , Sept. 2012.
[Abstract | pdf]

Steady-state behavior of class-E amplifier outside nominal operation taking into account MOSFET-body-diode effect
Tomoharu Nagashima and Hiroo Sekiya
Journal of Signal Prosessing, vol.16, no.4, July 2012.
[Abstract | pdf]

Bifurcation analysis of the class-E inverter for switching-pattern derivations
Tomoharu Nagashima, XiuqinWei, Takuji Kousaka, and Hiroo Sekiya
IEICE Communications Express (ComEx), vol.1, no.1, pp.33-39, June 2012.
[Abstract | pdf]

MAC protocol for smart-antenna used ad hoc networks with RTS/CTS overhead reduction
Jing Ma, Hiroo Sekiya, Nobuyoshi Komuro, and Shiro Sakata
Journal of Selected Areas in telecommunications (JSAT), pp.10-19, June 2012.
[Abstract | pdf]

Backoff-stage synchronization in three-hop string-topology wireless networks with hidden nodes
Kosuke Sanada, Hiroo Sekiya, Nobuyoshi Komuro, and Shiro Sakata
Nonlinear Theory and Its Applications, IEICE, vol.3, no.2, pp.200-214, Apr. 2012.
[Abstract | pdf]

無線マルチホップネットワークにおけるトークン生成レートに基づく複数優先フローQoS保証のための受信機会制御方式
高瀬 琢磨, 小室 信喜, 阪田 史郎, 関屋 大雄, 塩田 茂雄, 村瀬 勉
電子情報通信学会論文誌B, vol.J95-B, no.2, pp.188-198, Feb. 2012.
[Abstract | pdf]

Feature optimization approach for improving the collaborative filtering performance using particle swarm optimization
Amira Abdelwahab, Hiroo Sekiya, Ikuo Matsuba, Yasuo Horiuchi, Shingo Kuroiwa
Journal of Computational Information Systems, vol.8, no.1, p.435–450, Jan. 2012.
[Abstract | pdf]

Alleviating the sparsity problem of collaborative filtering using an efficient iterative clustered prediction technique
Amira Abdelwahab, Hiroo Sekiya, Ikuo Matsuba, Yasuo Horiuchi, and Shingo Kuroiwa
International Journal of Information Technology and Decision Making (IJITDM), vol.11, no.1, pp.33-53, Jan. 2012.
[Abstract | pdf]

Inductively coupled wireless power transfer with class-DE power amplifier
Tomoharu Nagashima, Xiuqin Wei, Tadashi Suetsugu, and Hiroo Sekiya
2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS2012), , pp.73-76, Dec. 2012.
[Abstract | pdf]

An asynchronous multi-channel MAC protocol with Pulse/Tone exchange for RTS collision avoidance
Ryo Manzoku, Hiroo Sekiya, Jing Ma, Kosuke Sanada and Shiro Sakata
1st IEEE International Symposium on Telecommunication Technologies (ISTT2012), pp.76-81, Nov. 2012.
[Abstract | pdf]

Analytical derivation of switching-pattern distribution for class-E amplifier using bifurcation theory
Tomoharu Nagashima , Xiuqin Wei, Takuji Kousaka, and Hiroo Sekiya
2012 International Symposium on Nonlinear Theory and its Applications (NOLTA2012), pp.687-690, Oct. 2012.
[Abstract | pdf]

Bifurcation in injection-locked class-EM oscillator
Ryuta Nakamura, XiuqinWei, Takuji Kousaka, and Hiroo Sekiya
2012 International Symposium on Nonlinear Theory and its Applications (NOLTA2012), pp.691-694, Oct. 2012.
[Abstract | pdf]

Influence of nonlinear shunt capacitance in harmonic distortion in output envelope of drain voltage modulated Class E amplifier
Tadashi Suetsugu, Hiroo Sekiya, and Xiuquin Wei
2012 International Symposium on Nonlinear Theory and its Applications (NOLTA2012), pp.614-617, Oct. 2012.
[Abstract | pdf]

A directional MAC protocol with the DATA-frame fragmentation and short busy advertisement signal for mitigating the directional hidden node problem
Sho Motegi, Hiroo Sekiya, Jing Ma, Kosuke Sanada and Shiro Sakata
2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC2012), pp.409-414, Sept. 2012.
[Abstract | pdf]

A numerical approach to calculate grazing bifurcation points in an impact oscillator with periodic boundaries
Akiko Takahashi, Hiroo Sekiya, Kazuyuki Aihara and Takuji Kousaka
2012 IEEE International Symposium on Circuits and Systems (ISCAS2012), pp.2011-2014, May 2012.
[Abstract | pdf]

Improvement of the calculation method for the grazing bifurcation point in two-dimensional impact oscillator
Yusho Shimizu, Hiroo Sekiya, Kazuyuki Aihara, and Takuji Kousaka
2012 RISP International Workshop on Nonlinear Circuits, Communications, and Signal Processing (NCSP2012), pp.5-8, Mar. 2012.
[Abstract | pdf]

Approximate analysis for class-EM amplifier taking into account harmonic frequency components
Taro Kakimoto, Tomoharu Nagashima, Xiuqin Wei and Hiroo Sekiya
2012 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2012), pp.154-157, Mar. 2012.
[Abstract | pdf]

An enhanced PSO algorithm for designing class E amplifier
Yuichi Tanji, Haruna Matsushita, and Hiroo Sekiya
2012 RISP International Workshop on Nonlinear Circuits, Communications, and Signal Processing (NCSP2012), pp.146-149, Mar. 2012.
[Abstract | pdf]

Analytical method of maximum UDP throughput for one-way wireless multi-Hop networks using Markov Chain model
Kosuke Sanada, Hiroo Sekiya, Nobuyoshi Komuro and Shiro Sakata
2012 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2012), pp.125-128, Mar. 2012.
[Abstract | pdf]

DATAフレームフラグメンテーションとSBA信号を用いて指向性隠れ端末問題を軽減する指向性MACプロトコル
茂木 翔, 関屋 大雄, 馬 ジン, 眞田 耕輔, 阪田 史郎
電子情報通信学会無線通信システム研究会, vol.112, no.351, pp.59-64, Dec. 2012.
[Abstract | pdf]

Pulse/Tone 信号を用いて制御チャネル上のRTSフレーム衝突を軽減するマルチチャネルMACプロトコル
満足 亮, 関屋 大雄, 馬 ジン, 眞田 耕輔, 阪田 史郎
電子情報通信学会無線通信システム研究会, vol.112, no.351, pp.65-69, Dec. 2012.
[Abstract | pdf]

直線状無線マルチホップネットワークにおける非飽和及び最大スループット解析
眞田 耕輔, 関屋 大雄, 阪田 史郎
電子情報通信学会ネットワークシステム研究会, vol.112, no.350, pp.91-95, Dec. 2012.
[Abstract | pdf]

Resonant class E rectifier for wireless power transfer in contactless IC card reader/writer
Tadashi Suetsugu, Xiuqin Wei, Kazunari Shimazaki, Tomoharu Nagashima, and Hiroo Sekiya
2012 Korea-Japan Joint Technical Workshop on Semiconductor Power Converter, pp.58-61, Nov. 2012.
[Abstract | pdf]

Comparisons of RF choke inductor designs by area product and core geometry
Hiroo Sekiya
2012 Korea-Japan Joint Technical Workshop on Semiconductor Power Converter, pp.45-49, Nov. 2012.
[Abstract | pdf]

Non-saturated and maximum throughput analysis for string topology wireless multi-hop networks
Kosuke Sanada, Hiroo Sekiya, and Shiro Sakata
IEICE Technical Committee on Complex Communication Science, Korea Japan Joint Workshop, Nov. 2012.
[Abstract | pdf]

あるマルチホップネットワークに生じるバックオフステージ同期とその考察
眞田 耕輔, 関屋 大雄, 小室 信喜, 阪田 史郎
電子情報通信学会 複雑コミュニケーションサイエンス研究会, vol.CCS-2012-006, pp.29-35, Aug. 2012.
[Abstract | pdf]

スマートアンテナとPulse/Tone の適用によりRTS/CTSを不必要とするアドホックネットワーク用MACプロトコル
馬 ジン, 関屋 大雄, 小室 信喜, 阪田 史郎
電子情報通信学会アドホックネットワーク研究会, vol.112, no.122, pp.7-12, July 2012.
[Abstract | pdf]

E級増幅器におけるQ値に非依存な電力変換効率の解析的導出
永島 和治, 魏 秀欽, 高坂 拓司, 関屋 大雄
電子情報通信学会非線形問題研究会, vol.112, no.6, pp.115-120, Apr. 2012.
[Abstract | pdf]

無線マルチホップネットワークにおけるトークン生成レートに基づく複数優先フローQoS保証のための受信機会制御方式
高瀬琢磨, 小室信喜, 阪田史郎, 関屋大雄, 塩田茂雄, 村瀬勉
電子情報通信学会情報ネットワーク研究会, vol.111, no.469, pp.25-30, Mar. 2012.
[Abstract | pdf]

IEEE 802.11eとDCFの混在無線LAN環境への受信機会制御適用による動的QoS保証
渡部公介, 小室信喜, 阪田史郎, 関屋大雄, 塩田茂雄, 村瀬勉
電子情報通信学会情報ネットワーク研究会, vol.111, no.469, pp.293-298, Mar. 2012.
[Abstract | pdf]

[チュートリアルセッション] IEEE802.11 マルチホップネットワークにおけるバックオフステージ同期現象とその解析
関屋大雄, 眞田耕輔, 小室信喜, 阪田史郎
2012年電子情報通信学会総合大会, Mar. 2012.
[Abstract | pdf]