Takashi Ohira

Publication Activity (10 Years)

Years Active: 2001-2023
Publications (10 Years): 8

Top Topics

Mahalanobis Distance

Measurement Data

Top Venues

IEICE Electron. Express

IEICE Trans. Electron.

IEEE Trans. Circuits Syst. II Express Briefs

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.

Publications

Ryoya Honda, Minoru Mizutani, Masaya Tamura, Takashi Ohira
Class-E Synchronous RF Rectifier: Circuit Formulation, Geodesic Trajectory, Time-Domain Simulation, and Prototype Experiment. IEICE Trans. Electron. 106 (11) (2023)
Takashi Ohira, Satoshi Tsukamoto, Naoki Sakai, Shinji Abe, Masayoshi Sugino, Nobukazu Sakura, Kunihiko Sasaki
Live Demonstration: An HF Capacitive Wireless Power Transfer to a Quad-Rotor Drone. ISCAS (2019)
Takashi Ohira
Power Transfer Theory on Linear Passive Two-Port Systems. IEICE Trans. Electron. (10) (2018)
Takashi Ohira
Power transfer efficiency formulation for reciprocal and non-reciprocal linear passive two-port systems. IEICE Electron. Express 15 (3) (2018)
Sonshu Sakihara, Satoshi Kitabayashi, Naoki Sakai, Takashi Ohira
Far-End Reactor Matching to a Traveling Load Along an RF Power Transmission Line. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2018)
Kyohei Yamada, Takashi Ohira
Graphical Representation of the Power Transfer Efficiency of Lumped-Element Circuits Based on Hyperbolic Geometry. IEEE Trans. Circuits Syst. II Express Briefs (5) (2017)
Sonshu Sakihara, Masaru Takana, Naoki Sakai, Takashi Ohira
Power Dependent Impedance Measurement Exploiting an Oscilloscope and Möbius Transformation. IEICE Trans. Electron. (10) (2017)
Kyohei Yamada, Naoki Sakai, Takashi Ohira
Internal Power Loss Formulas of Lumped-Element Matching Circuits for High-Efficiency Wireless Power Transfer. IEICE Trans. Electron. (10) (2016)
Takashi Ohira
Maximum available efficiency formulation based on a black-box model of linear two-port power transfer systems. IEICE Electron. Express 11 (13) (2014)
Takashi Ohira
product formulas for capacitive- and inductive-coupling wireless power transfer schemes. IEICE Electron. Express 11 (9) (2014)
Takanari Minami, Takashi Ohira
factor formula for use in noise spectrum estimation from Leeson's and Hajimiri's models [IEICE Electronics Express Vol 10 (2013) No 24 pp 20130806]. IEICE Electron. Express 11 (1) (2014)
Akiro Shimada, Shinsuke Ohtake, Yuichi Miyaji, Hideyuki Uehara, Takashi Ohira
Power division ratio on multi-hop WPT considering coupling of the receiver with two couplers. IEICE Electron. Express 11 (5) (2014)
Takashi Ohira
Power efficiency and optimum load formulas on RF rectifiers featuring flow-angle equations. IEICE Electron. Express 10 (11) (2013)
Takanari Minami, Takashi Ohira
factor formula for use in noise spectrum estimation from Leeson's and Hajimiri's models. IEICE Electron. Express 10 (24) (2013)
Takashi Ohira
factor formulas stemming from oscillation frequency stability against source and load deviations. IEICE Electron. Express 9 (7) (2012)
Keizo Inagaki, Takashi Ohira, Tetsuya Kawanishi, Masayuki Izutsu
Beam steering array antenna controlled by optical wavelength. IEICE Electron. Express 8 (15) (2011)
Tuya Wuren, Takashi Ohira
Factor Analysis for Non-uniform Microstrip Stub Colpitts FET Oscillators. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2011)
Takashi Ohira
factor formula for general one- and two-port active device oscillators. IEICE Electron. Express 7 (19) (2010)
Ranga Hettiarachchi, Mitsuo Yokoyama, Hideyuki Uehara, Takashi Ohira
Interference Canceller Based on Cycle-and-Add Property for Single User Detection in DS-CDMA. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2009)
Chen Sun, Thomas Hunziker, Jun Cheng, Makoto Taromaru, Takashi Ohira
Optimal Frame Splitting for Downlink MIMO Channels With Distributed Antenna Arrays. IEEE Trans. Veh. Technol. 57 (6) (2008)
Takashi Ohira, Tuya Wuren
Pseudolinear Circuit Theory for Sinusoidal Oscillator Performance Maximization. IEICE Trans. Electron. (11) (2008)
Takashi Ohira, Kiyomichi Araki
Active Q-Factor and Equilibrium Stability Formulation for Sinusoidal Oscillators. IEEE Trans. Circuits Syst. II Express Briefs (9) (2007)
Thomas Hunziker, Jacir Luiz Bordim, Makoto Taromaru, Takashi Ohira
Maximum-Likelihood Array Signal Decoding in the Presence of Block-Wise Stationary Cochannel Interference. IEEE Trans. Wirel. Commun. 6 (4) (2007)
Chen Sun, Makoto Taromaru, Takashi Ohira
Employing Coordinated Transmit and Receive Beamforming in Clustering Double-Directional Radio Channel. EURASIP J. Wirel. Commun. Netw. 2007 (2007)
Chulgyun Park, Jun-ichi Takada, Kei Sakaguchi, Takashi Ohira
Spatial Fading Simulator Using a Cavity-Excited Circular Array (CECA) for Performance Evaluation of Antenna Arrays. IEICE Trans. Commun. (3) (2006)
Jun Cheng, Takashi Ohira, Koichi Kamoi, Yoichiro Watanabe
Spreading Set With Error Correction for Multiple-Access Adder Channel. IEEE Trans. Inf. Theory 52 (12) (2006)
Takashi Ohira, Kiyomichi Araki
Dimensional extension of Kurokawa's stability criterion for general multi-port device oscillators. IEICE Electron. Express 3 (7) (2006)
Takashi Ohira
Special Section on Emerging Microwave Techniques. IEICE Trans. Electron. (12) (2006)
Takashi Ohira, Kiyomichi Araki
Oscillator frequency spectrum as viewed from resonant energy storage and complex Q factor. IEICE Electron. Express 3 (16) (2006)
Qing Han, Brett Hanna, Takashi Ohira
A Compact Espar Antenna with Planar Parasitic Elements on a Dielectric Cylinder. IEICE Trans. Commun. (6) (2005)
Qing Han, Keizo Inagaki, Takashi Ohira
Perturbation Analysis and Experimental Verification of Intermodulation and Harmonic Distortion for an Anti-Series Varactor Pair. IEICE Trans. Electron. (1) (2005)
Takashi Ohira
Rigorous Q-factor formulation for one- and two-port passive linear networks from an oscillator noise spectrum viewpoint. IEEE Trans. Circuits Syst. II Express Briefs (12) (2005)
Takuma Sawaya, Kyouichi Iigusa, Makoto Taromaru, Takashi Ohira
Reactance diversity: proof-of-concept experiments in an indoor multipath-fading environment with a 5-GHz prototype planar ESPAR antenna. CCNC (2004)
Thomas Hunziker, Tomoyuki Aono, Takashi Ohira
An iterative beamforming and decoding procedure for wireless networks with uncoordinated channel access. IEEE Commun. Lett. 8 (4) (2004)
Kyouichi Iigusa, Takashi Ohira
A simple and accurate mathematical model of electronically steerable parasitic array radiator antennas. CCNC (2004)
Thomas Hunziker, Jacir Luiz Bordim, Takashi Ohira, Shinsuke Tanaka
An Interference Avoidance Technique for Ad Hoc Networks Employing Array Antennas. ICT (2004)
Thomas Hunziker, Tomoyuki Aono, Takashi Ohira
An iterative beamforming technique for OFDM-based wireless networks with uncoordinated channel access. ICC (2004)
Takashi Ohira
Mathematical proof of Leeson's oscillator noise spectrum model. IEICE Electron. Express 1 (5) (2004)
Thomas Hunziker, Jacir Luiz Bordim, Takashi Ohira, Shinsuke Tanaka
A CSMA/CA-based medium access scheme for array antenna-enhanced wireless ad hoc networks. ISWCS (2004)
Kehu Yang, Takashi Ohira, Yimin Zhang, Chong-Yung Chi
Super-exponential blind adaptive beamforming. IEEE Trans. Signal Process. 52 (6) (2004)
Thomas Hunziker, Masaya Hashiguchi, Takashi Ohira
Reception of coded OFDM signals in broad-band fading environments with strong cochannel interference. GLOBECOM (2003)
Eddy Taillefer, Cyril Plapous, Jun Cheng, Kyouichi Iigusa, Takashi Ohira
Reactance-domain MUSIC for ESPAR antennas (experiment). WCNC (2003)
Kehu Yang, Takashi Ohira, Yimin Zhang, Chong-Yung Chi
A super-exponential blind adaptive beamforming algorithm. ICASSP (2002)
Takashi Ohira
Analog smart antennas: an overview. PIMRC (2002)
Takashi Ohira
Emerging adaptive antenna techniques for wireless ad-hoc networks. ISCAS (4) (2001)
Koichi Gyoda, Youiti Kado, Yuichiro Ohno, Kazuo Hasuike, Takashi Ohira
WACNet - Wireless Ad-hoc Community Network. ISCAS (4) (2001)