Computational Complexity of DECLARE Relation Problem for Sound non-Free-Choice Workflow Nets. - Ohta, Atsushi; Tsuji, Kohkichi (2020)

Experimental Verification of 1-Tap Time Domain Beamforming for P-MP Relay System via 75 GHz Band Measured CSI. - Suga, Mizuki; Ohta, Atsushi; Goto, Kazuto; Tsuchiya, Takahiro; Otsuki, Nobuaki; Shirato, Yushi; Kita, Naoki; Onizawa, Takeshi (IEICE Trans. Commun., 2019)

Experimental Verification of Null-Space Expansion for Multiuser Massive MIMO via Channel State Information Measurement. - Iwakuni, Tatsuhiko; Maruta, Kazuki; Ohta, Atsushi; Shirato, Yushi; Iizuka, Masataka (IEICE Trans. Commun., 2018)

Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment. - Arai, Takuto; Ohta, Atsushi; Shirato, Yushi; Kurosaki, Satoshi; Maruta, Kazuki; Iwakuni, Tatsuhiko; Iizuka, Masataka (IEICE Trans. Commun., 2017)

Massive Antenna Systems for Wireless Entrance (MAS-WE): Practical Application of Massive MIMO with Simplified Space Division Multiplexing Schemes. - Maruta, Kazuki; Ohta, Atsushi; Kurosaki, Satoshi; Arai, Takuto; Iizuka, Masataka (IEICE Trans. Commun., 2017)

Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels. - Iwakuni, Tatsuhiko; Maruta, Kazuki; Ohta, Atsushi; Shirato, Yushi; Arai, Takuto; Iizuka, Masataka (IEICE Trans. Commun., 2017)

Experimental Investigation of Space Division Multiplexing on Massive Antenna Systems for Wireless Entrance. - Maruta, Kazuki; Ohta, Atsushi; Kurosaki, Satoshi; Arai, Takuto; Iizuka, Masataka (IEICE Trans. Commun., 2017)

A Replication Protocol Supporting Multiple Consistency Models without Single Point of Failure. - Ohta, Atsushi; Kawashima, Ryota; Matsuo, Hiroshi (IEICE Trans. Inf. Syst., 2016)

First Eigenmode Transmission by High Efficient CSI Estimation for Multiuser Massive MIMO Using Millimeter Wave Bands. - Maruta, Kazuki; Iwakuni, Tatsuhiko; Ohta, Atsushi; Arai, Takuto; Shirato, Yushi; Kurosaki, Satoshi; Iizuka, Masataka (Sensors, 2016)

Correlation-based user scheduling and multi-planar parallelogram array for Massive antenna systems. - Arai, Takuto; Ohta, Atsushi; Kurosaki, Satoshi; Maruta, Kazuki; Iwakuni, Tatsuhiko; Iizuka, Masataka (2016)

Experimental Verification of Null-Space Expansion for Multiuser Massive MIMO Using Measured Channel State Information. - Iwakuni, Tatsuhiko; Maruta, Kazuki; Ohta, Atsushi; Shirato, Yushi; Arai, Takuto; Iizuka, Masataka (2016)

A Graph-Theory-Based Algorithm for Euler Number Computing. - He, Lifeng; Yao, Bin; Zhao, Xiao; Yang, Yun; Chao, Yuyan; Ohta, Atsushi (IEICE Trans. Inf. Syst., 2015)

Deferred-Update Replication Supporting Multiple Consistency Models. - Ohta, Atsushi; Kawashima, Ryota; Matsuo, Hiroshi (2015)

Experimental investigation of space division multiplexing on Massive Antenna Systems. - Maruta, Kazuki; Ohta, Atsushi; Kurosaki, Satoshi; Arai, Takuto; Iizuka, Masataka (2015)

A novel application of Massive MIMO: Massive Antenna Systems for Wireless Entrance (MAS-WE). - Maruta, Kazuki; Ohta, Atsushi; Kurosaki, Satoshi; Arai, Takuto; Iizuka, Masataka (2015)

Inter-user interference suppression in time varying channel with null-space expansion for multiuser massive MIMO. - Iwakuni, Tatsuhiko; Maruta, Kazuki; Ohta, Atsushi; Shirato, Yushi; Arai, Takuto; Iizuka, Masataka (2015)

An Efficient Strategy for Bit-Quad-Based Euler Number Computing Algorithm. - Yao, Bin; Wu, Hua; Yang, Yun; Chao, Yuyan; Ohta, Atsushi; Kawanaka, Haruki; He, Lifeng (IEICE Trans. Inf. Syst., 2014)

Applying FFR to Inter-Cell Interference Cancellation with Quasi-Decentralized Base Station Cooperation. - Maruta, Kazuki; Ohta, Atsushi; Iizuka, Masataka; Sugiyama, Takatoshi (2014)

The Liveness of WS3PR: Complexity and Decision. - Liu, GuanJun; Jiang, Changjun; Zhou, MengChu; Ohta, Atsushi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Network Interface Architecture with Scalable Low-Latency Message Receiving Mechanism. - Tanabe, Noboru; Ohta, Atsushi (IEICE Trans. Inf. Syst., 2013)

Spectral Efficiency Improvement of Fractional Frequency Reuse by Inter-Cell Interference Cancellation on Cooperative Base Station. - Maruta, Kazuki; Ohta, Atsushi; Iizuka, Masataka; Sugiyama, Takatoshi (IEICE Trans. Commun., 2012)

Decidability Analysis of Some Classes of Extended Function Petri Net. - Ohta, Atsushi; Tsuji, Kohkichi (2012)

Iterative Inter-Cluster Interference Cancellation for Cooperative Base Station Systems. - Maruta, Kazuki; Ohta, Atsushi; Iizuka, Masataka; Sugiyama, Takatoshi (2012)

Verifying Structurally Weakly Persistent Net Is Co-NP Complete. - Ohta, Atsushi; Tsuji, Kohkichi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

Reconfigurable Android with an FPGA Accelerator for the Future Embedded Devices. - Nakajo, Hironori; Koike, Keisuke; Ohta, Atsushi; Ohshima, Kohta; Fujinami, Kaori (2011)

A New User Selection Measure in Block Diagonalization Algorithm for Multiuser MIMO Systems. - Kudo, Riichi; Takatori, Yasushi; Nishimori, Kentaro; Ohta, Atsushi; Kubota, Shuji; Mizoguchi, Masato (IEICE Trans. Commun., 2009)

Computational Complexity of Liveness Problem of Normal Petri Net. - Ohta, Atsushi; Tsuji, Kohkichi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Experiments on FPGA-Implemented Eigenbeam MIMO-OFDM With Transmit Antenna Selection. - Onizawa, Takeshi; Ohta, Atsushi; Asai, Yusuke (IEEE Trans. Veh. Technol., 2009)

Network Interface Architecture for Scalable Message Queue Processing. - Tanabe, Noboru; Ohta, Atsushi; Waskito, Pulung; Nakajo, Hironori (2009)

Inter-cluster interference canceller for multiuser MIMO distributed antenna systems. - Maruta, Kazuki; Maruyama, Takashi; Ohta, Atsushi; Nakatsugawa, Masashi (2009)

Optimized dynamic resource allocation in frequency and spatial domains. - Maruyama, Takashi; Maruta, Kazuki; Ohta, Atsushi; Nakatsugawa, Masashi (2009)

Antenna Selection Method for Terminal Antennas Employing Orthogonal Polarizations and Patterns in Outdoor Multiuser MIMO System. - Honma, Naoki; Kudo, Riichi; Nishimori, Kentaro; Takatori, Yasushi; Ohta, Atsushi; Kubota, Shuji (IEICE Trans. Commun., 2008)

Using a GPU to Accelerate Die and Mold Fabrication. - Inui, Masatomo; Ohta, Atsushi (IEEE Computer Graphics and Applications, 2007)

A Synchronization Scheme for Packet Mode MIMO-OFDM Signals in Wireless LAN. - Onizawa, Takeshi; Fujita, Takafumi; Asai, Yusuke; Uchida, Daisei; Ohta, Atsushi; Aikawa, Satoru (IEICE Trans. Commun., 2007)

A Simple and Feasible Decision-Feedback Channel Tracking Scheme for MIMO-OFDM Systems. - Asai, Yusuke; Jiang, Wenjie; Onizawa, Takeshi; Ohta, Atsushi; Aikawa, Satoru (IEICE Trans. Commun., 2007)

New Downlink Beamforming Method for Cooperative Multiple Access Point Systems. - Kudo, Riichi; Takatori, Yasushi; Nishimori, Kentaro; Ohta, Atsushi; Kubota, Shuji (IEICE Trans. Commun., 2007)

New Robust Beamforming Method for Frequency Offsets in Uplink Multiuser OFDM-MIMO. - Takatori, Yasushi; Kudo, Riichi; Ohta, Atsushi; Ishihara, Koichi; Nishimori, Kentaro; Kubota, Shuji (IEICE Trans. Commun., 2007)

User Selection Method for Block Diagonalization in Multiuser MIMO Systems. - Kudo, Riichi; Takatori, Yasushi; Nishimori, Kentaro; Ohta, Atsushi; Kubota, Shuji (2007)

Implementation and Evaluation of Multicast Mechanism on Network Interface Plugged into a Memory Slot. - Ohta, Atsushi; Hamada, Yoshihiro; Kitamura, Akira; Tanabe, Noboru; Amano, Hideharu; Nakajo, Hironori (2007)

New Simple Capacity Estimation Method for Multiuser Block Diagonalization Transmission. - Kudo, Riichi; Takatori, Yasushi; Ohta, Atsushi; Nishimori, Kentaro; Kubota, Shuji (2007)

Special Section on Concurrent/Hybrid Systems: Theory and Applications. - Ohta, Atsushi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

FPGA Implementation of Eigenbeam MIMO-OFDM for Wireless LAN and Its Experimental Performance. - Onizawa, Takeshi; Ohta, Atsushi; Asai, Yusuke; Aikawa, Satoru (IEICE Trans. Commun., 2006)

Structural analysis of Petri nets with batch processing arcs. - Ohta, Atsushi; Kato, Chihiro; Tsuji, Kohkichi (2006)

Performance Evaluation of 8×8 Multi-User MIMO-OFDM Testbed in an Actual Indoor Environment. - Nishimori, Kentaro; Kudo, Riichi; Takatori, Yasushi; Ohta, Atsushi; Tsunekawa, Koichi (2006)

Experimental Evaluation of Transmit Antenna Selection Implemented in FPGA for Eigenbeam MIMO-OFDM. - Onizawa, Takeshi; Ohta, Atsushi; Asai, Yusuke; Aikawa, Satoru (2006)

A Simplified Decision-Feedback Channel Tracking Scheme for MIMO-OFDM Systems. - Asai, Yusuke; Jiang, Wenjie; Onizawa, Takeshi; Aikawa, Satoru; Uchida, Daisei; Ohta, Atsushi (2006)

Experimental Evaluation of Transmit Antenna Selection Implemented in FPGA for MIMO-OFDM. - Onizawa, Takeshi; Ohta, Atsushi; Aikawa, Satoru (2006)

Experimental Evaluation of Eigenbeam MIMO-OFDM Implemented in FPGA for Wireless LAN. - Onizawa, Takeshi; Ohta, Atsushi; Asai, Yusuke; Aikawa, Satoru (2006)

A Reduced-Complexity Signal Detection Scheme Employing ZF and K-Best Algorithms for OFDM/SDM. - Fujita, Takafumi; Ohta, Atsushi; Onizawa, Takeshi; Sugiyama, Takatoshi (IEICE Trans. Commun., 2005)

A Simplified Maximum Likelihood Detector for OFDM-SDM Systems in Wireless LAN. - Jiang, Wenjie; Onizawa, Takeshi; Ohta, Atsushi; Aikawa, Satoru (IEICE Trans. Commun., 2005)

Minimal time reachability problem of some subclasses of timed Petri nets. - Ohta, Atsushi; Tsuji, Kohkichi; Hisamura, Tomiji (2005)

Unfolding of Petri nets with semilinear reachability set. - Ohta, Atsushi; Tsuji, Kohkichi (2004)

A new signal detection scheme combining ZF and K-best algorithms for OFDM/SDM. - Fujita, Tukafunzi; Onizawa, Takeshi; Jiang, Wenjie; Uchida, Daisei; Sugiyama, Takatoshi; Ohta, Atsushi (2004)

Insufficiently marked siphon of Petri nets - extension of token-free siphon. - Ohta, Atsushi; Tsuji, Kohkichi (2003)

NP-Hardness of Liveness Problem of Bounded Asymmetric Choice Net. - Ohta, Atsushi; Tsuji, Kohkichi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

Prototype AWA: design and implementation of a high speed ATM wireless access system using 25 GHz band. - Manabe, Toshihiro; Sugiyama, Takatoshi; Ohta, Atsushi; Nuno, Fusao; Suzuki, Hiroyuki; Uwano, Shuta; Aikawa, Satoru; Umehira, Masahiro (Comput. Networks, 1999)

Automatic repeat request schemes for high-speed wireless access systems with constraint of finite control channel capacity. - Yoshioka, Masafumi; Ohta, Atsushi; Matsumoto, Yoichi; Umehira, Masahiro (1999)