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Tadashi Matsumoto Professor
School of Information Science¡ÊDepartment of Information Science¡¦Computer Systems and Networks¡Ë
B.S. from Keio University(1978)¡¢M.S.from Keio University(1980)¡¢Ph.D from Keio University(1991)
Nippon Telegram and Telephone Public Corporation(£Î£Ô£Ô)(1980), £Î£Ô£ÔDoCoMo(1992), Professor, Wireless Communications, at Oulu University (2002)¡¢Guest professor, Ilmenau University of Technology (2006)
Wireless Communications, Information T£èeory, Coding Theory, Iterative (Turbo) Algorithm, Network Information Theory, Information Theoretic Analysis and Coding Techniques for Relay and Sensor Network, Multi-Dimensional Channel nalysis
Turbo Coding, Turbo Equalization, Network Information Theory, Mutual Information Transfer Chart
Joint Decoding of Source and Channel Codes using Message Techniques
Jount decoding of source and channel codes using the Turrbo principle is sought for. Convergence property analysis using extrinsc information transfer chart provides us with the information about the matching optimality of the codes, and hence the EXIT curve matching techniques will be used as a tool for the optimization.
Optimal Activation Control of Multiple Turbo Loops
To detect signals via detector-decoder chains having multiple Turbo loops, the optimal path in the extrinsic information transfer plain has to be found to minimize the decoding/detection complexity. The primary goal of this research is to develop algorithms that can achieve the optimality in activation control of the multiple Turbo loops to minimize the decoding/detection complexity.
A Unified Apprach to the MAC and Slepian-Wolf Region and its Applications
The primary goal of this research is to establish methodologies allowing us to calculate the multiple access (MAC) and Slepian Wolf regions for correlated sources. Major applications of the outcomes of this research include joint optimization of cooperative source and channel coding in sensor and/or relaying networks.
Compression Techniques for Sensor Network
The purpose of this research work is to fullfill the battery longevity requirement in sensor network by significantly reducing the information bit rate of the signal transmitted from sensors. To achieve this goal, Turbo decoding techniques will be used, where the correlation between the multiple sources is modeled as a hidden Markov source, and message passing takes place over the trellis diagrams representiong the source correlation.
Cooperative Coding for Multi-Hop Netwroks
In wireless multi-hop networks, cooperative coding techniques allow us to achieve diversity and coding gains, while also improving the throuput efficiency. This research work aims to develop signal relaying algorithms where account is taken of the fact that the signals received from the primary sender's and relayed terminals are correlated; The correlation is first estimated by the receiver, and then decoding of the codes used for relaying is performed using Turbo techniques.
Cross Layer Optimization in Wireless Communications Network towards Autonomous Resource Allocation and Adaptive Coding
Cross layer optimization is one of the crucial issues that have to be solved when designing spectrum- and power-efficient ubiquitous wireless networks. This research category includes a lot of issues, all related cross layer optimization , such as optimal resource allocation, adaptive coding and modulation, and scheduling. The major aim of this research category is to create algorithms that can bring autonomously the wireless networks to the optimal operation points using the message passing algorithm over the network nodes.
Semantic Language Analysis using Turbo Algorithms
Language recognition systems can be seen as a system having distributed multiple local decision making nodes. By utilizing the message passing technique over the multiple decision making nodes at different understanding level, the language literacy, as a whole, is expecetd to be significantly enhanced, especialy in the noisy environments. This research aims to establish algoerithms that can solve the semantic level language analysis using the Turbo techniques.
Turbo Estimation Techniques for Channel Prediction, Filtering, and Synchronization.
This research aims to apply the Turbo techniques to solving several estimation problems in wireless communications, including channel estimation, prediction, and synchronization. The factor graph-based detection and estimation technique using message passing algorithm will be used.
- Chapter: "Equalization" in "Mobile Broadband Multimedia Networks: Techniques, Models and Tools for 4th Generation Communication Networks"¡¤Tadashi Matsumoto¡¤Elsevier¡¤2006¡¤pp. 51-65
- Chapter: "Iterative (Turbo) Signal Processing Techniques for MIMO Signal Detection and Equalization" in "Smart Antenna; State-Of-the-Art"¡¤Tadashi Matsumoto¡¤EURASIP Book Series on Signal Processing and Communications: Hindawi¡¤2005¡¤pp.119-146
- Derivation of Outage Probability Expression for Decode-and-Forward Relaying System Allowing Intra-link Errors¡¤X. Zhou, M. Cheng, X. He and T. Matsumoto¡¤Submitted to IEEE International Conference on Communications 2014 (Under Review)
- On Outage Probability of Correlated Sources Transmission over Nakagami Fading Channels¡¤S. Qian, M. Cheng, K. Anwar and T. Matsumoto¡¤Submitted to IEEE International Conference on Communications 2014 (Under Review)
- PAPR Constrained Power Allocation for Iterative Frequency Domain Multiuser SIMO Detector¡¤Valtteri Tervo, A Tolli, J. Karjalainen, Tad Matsumoto,¡¤Submitted to IEEE International Conference on Communications 2014 (Under Review)
¡þLectures and Presentations
- Paradigm Shift in Turbo Processing: from P2P to Network¡¤Tad Matsumoto¡¤European Wireless 2013, April 16-18, 2013, Guildford, UK¡¤Surry University, Guildord
- Paradigm Shift in Turbo Processing: P2P to Network¡¤Tad Matsumoto¡¤IEEE Distinguished LectureSurry University, Guildford, UKApril 19, 2013¡¤Surry University, Guildford, UK
- Paradigm Shift in Turbo Processing: P2P to Network¡¤Tad Matsumoto¡¤Nordic Wireless Workshop, SNOWMarch 30-31¡¤Lapland
¡þAcademic Society Affiliations
- IEEE¡¤Vehicular Technology Society Board of Governer, Fellow¡¤2002-
- IEEE Vehicular Technology Society¡¤Distinguished Lecturer¡¤2013/07/01 - 2014/12/31
- IEEE Vehicular Technology Society¡¤Fellow Evaluation Committee Member¡¤2013/05/01 - 2013/07/31
- 24th IEEE International Symposium on Personal, Indoor, and Mobile Radop Communications (PIMRC)¡¤PHY and Fundamental Track Co-TPC Chaor¡¤2013/09/08 - 2013/09/11
¢£Academic Awards Received
- Nikkei Electronics-Japan Wireless Technology Award¡¤2013
- IEEE PIMRC 2013 Appreciation Certificate for Significant Contributions¡¤IEEE PIMRC Organizing Committee
- UK Royal Academy of Engineering Distinguished Visiting Fellow Award¡¤UK Royal Academy of Engineering¡¤2012