MERL - Mitsubishi Electric Research Laboratories

Toshiaki Koike-Akino

Toshiaki Koike-Akino
Toshi's Quick Links

  • Biography

    Prior to joining MERL in 2010, Toshiaki was a postdoctoral researcher at Harvard University. His research interests include signal processing, sensing, coding theory, and information theory. He received best paper awards at IEEE GLOBECOM in 2008 and 2009.

  • Recent News & Events

    •  NEWS    MERL Researchers give a Tutorial Talk on Quantum Machine Learning for Sensing and Communications at IEEE VCC
      Date: November 28, 2023 - November 30, 2023
      Where: Virtual
      MERL Contacts: Toshiaki Koike-Akino; Pu (Perry) Wang
      Research Areas: Artificial Intelligence, Communications, Computational Sensing, Machine Learning, Signal Processing
      Brief
      • On November 28, 2023, MERL researchers Toshiaki Koike-Akino and Pu (Perry) Wang will give a 3-hour tutorial presentation at the first IEEE Virtual Conference on Communications (VCC). The talk, titled "Post-Deep Learning Era: Emerging Quantum Machine Learning for Sensing and Communications," addresses recent trends, challenges, and advances in sensing and communications. P. Wang presents use cases, industry trends, signal processing, and deep learning for Wi-Fi integrated sensing and communications (ISAC), while T. Koike-Akino discusses the future of deep learning, giving a comprehensive overview of artificial intelligence (AI) technologies, natural computing, emerging quantum AI, and their diverse applications. The tutorial is conducted virtually.

        IEEE VCC is a new fully virtual conference launched from the IEEE Communications Society, gathering researchers from academia and industry who are unable to travel but wish to present their recent scientific results and engage in conducive interactive discussions with fellow researchers working in their fields. It is designed to resolve potential hardship such as pandemic restrictions, visa issues, travel problems, or financial difficulties.
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    •  NEWS    MERL researchers presenting four papers and organizing the VLAR-SMART101 Workshop at ICCV 2023
      Date: October 2, 2023 - October 6, 2023
      Where: Paris/France
      MERL Contacts: Moitreya Chatterjee; Anoop Cherian; Michael J. Jones; Toshiaki Koike-Akino; Suhas Lohit; Tim K. Marks; Pedro Miraldo; Kuan-Chuan Peng; Ye Wang
      Research Areas: Artificial Intelligence, Computer Vision, Machine Learning
      Brief
      • MERL researchers are presenting 4 papers and organizing the VLAR-SMART-101 workshop at the ICCV 2023 conference, which will be held in Paris, France October 2-6. ICCV is one of the most prestigious and competitive international conferences in computer vision. Details are provided below.

        1. Conference paper: “Steered Diffusion: A Generalized Framework for Plug-and-Play Conditional Image Synthesis,” by Nithin Gopalakrishnan Nair, Anoop Cherian, Suhas Lohit, Ye Wang, Toshiaki Koike-Akino, Vishal Patel, and Tim K. Marks

        Conditional generative models typically demand large annotated training sets to achieve high-quality synthesis. As a result, there has been significant interest in plug-and-play generation, i.e., using a pre-defined model to guide the generative process. In this paper, we introduce Steered Diffusion, a generalized framework for fine-grained photorealistic zero-shot conditional image generation using a diffusion model trained for unconditional generation. The key idea is to steer the image generation of the diffusion model during inference via designing a loss using a pre-trained inverse model that characterizes the conditional task. Our model shows clear qualitative and quantitative improvements over state-of-the-art diffusion-based plug-and-play models, while adding negligible computational cost.

        2. Conference paper: "BANSAC: A dynamic BAyesian Network for adaptive SAmple Consensus," by Valter Piedade and Pedro Miraldo

        We derive a dynamic Bayesian network that updates individual data points' inlier scores while iterating RANSAC. At each iteration, we apply weighted sampling using the updated scores. Our method works with or without prior data point scorings. In addition, we use the updated inlier/outlier scoring for deriving a new stopping criterion for the RANSAC loop. Our method outperforms the baselines in accuracy while needing less computational time.

        3. Conference paper: "Robust Frame-to-Frame Camera Rotation Estimation in Crowded Scenes," by Fabien Delattre, David Dirnfeld, Phat Nguyen, Stephen Scarano, Michael J. Jones, Pedro Miraldo, and Erik Learned-Miller

        We present a novel approach to estimating camera rotation in crowded, real-world scenes captured using a handheld monocular video camera. Our method uses a novel generalization of the Hough transform on SO3 to efficiently find the camera rotation most compatible with the optical flow. Because the setting is not addressed well by other data sets, we provide a new dataset and benchmark, with high-accuracy and rigorously annotated ground truth on 17 video sequences. Our method is more accurate by almost 40 percent than the next best method.

        4. Workshop paper: "Tensor Factorization for Leveraging Cross-Modal Knowledge in Data-Constrained Infrared Object Detection" by Manish Sharma*, Moitreya Chatterjee*, Kuan-Chuan Peng, Suhas Lohit, and Michael Jones

        While state-of-the-art object detection methods for RGB images have reached some level of maturity, the same is not true for Infrared (IR) images. The primary bottleneck towards bridging this gap is the lack of sufficient labeled training data in the IR images. Towards addressing this issue, we present TensorFact, a novel tensor decomposition method which splits the convolution kernels of a CNN into low-rank factor matrices with fewer parameters. This compressed network is first pre-trained on RGB images and then augmented with only a few parameters. This augmented network is then trained on IR images, while freezing the weights trained on RGB. This prevents it from over-fitting, allowing it to generalize better. Experiments show that our method outperforms state-of-the-art.

        5. “Vision-and-Language Algorithmic Reasoning (VLAR) Workshop and SMART-101 Challenge” by Anoop Cherian,  Kuan-Chuan Peng, Suhas Lohit, Tim K. Marks, Ram Ramrakhya, Honglu Zhou, Kevin A. Smith, Joanna Matthiesen, and Joshua B. Tenenbaum

        MERL researchers along with researchers from MIT, GeorgiaTech, Math Kangaroo USA, and Rutgers University are jointly organizing a workshop on vision-and-language algorithmic reasoning at ICCV 2023 and conducting a challenge based on the SMART-101 puzzles described in the paper: Are Deep Neural Networks SMARTer than Second Graders?. A focus of this workshop is to bring together outstanding faculty/researchers working at the intersections of vision, language, and cognition to provide their opinions on the recent breakthroughs in large language models and artificial general intelligence, as well as showcase their cutting edge research that could inspire the audience to search for the missing pieces in our quest towards solving the puzzle of artificial intelligence.

        Workshop link: https://wvlar.github.io/iccv23/
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  • Awards

    •  AWARD    MERL’s Paper on Wi-Fi Sensing Earns Top 3% Paper Recognition at ICASSP 2023, Selected as a Best Student Paper Award Finalist
      Date: June 9, 2023
      Awarded to: Cristian J. Vaca-Rubio, Pu Wang, Toshiaki Koike-Akino, Ye Wang, Petros Boufounos and Petar Popovski
      MERL Contacts: Petros T. Boufounos; Toshiaki Koike-Akino; Pu (Perry) Wang; Ye Wang
      Research Areas: Artificial Intelligence, Communications, Computational Sensing, Dynamical Systems, Machine Learning, Signal Processing
      Brief
      • A MERL Paper on Wi-Fi sensing was recognized as a Top 3% Paper among all 2709 accepted papers at the 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2023). Co-authored by Cristian Vaca-Rubio and Petar Popovski from Aalborg University, Denmark, and MERL researchers Pu Wang, Toshiaki Koike-Akino, Ye Wang, and Petros Boufounos, the paper "MmWave Wi-Fi Trajectory Estimation with Continous-Time Neural Dynamic Learning" was also a Best Student Paper Award finalist.

        Performed during Cristian’s stay at MERL first as a visiting Marie Skłodowska-Curie Fellow and then as a full-time intern in 2022, this work capitalizes on standards-compliant Wi-Fi signals to perform indoor localization and sensing. The paper uses a neural dynamic learning framework to address technical issues such as low sampling rate and irregular sampling intervals.

        ICASSP, a flagship conference of the IEEE Signal Processing Society (SPS), was hosted on the Greek island of Rhodes from June 04 to June 10, 2023. ICASSP 2023 marked the largest ICASSP in history, boasting over 4000 participants and 6128 submitted papers, out of which 2709 were accepted.
    •  
    •  AWARD    Toshiaki Koike-Akino elected Fellow of Optica
      Date: November 18, 2021
      Awarded to: Toshiaki Koike-Akino
      MERL Contact: Toshiaki Koike-Akino
      Research Areas: Communications, Electronic and Photonic Devices, Signal Processing
      Brief
      • Toshiaki Koike-Akino's research activities in communications, error control coding and optical technologies at MERL have earned him election as a Fellow Member of Optica (formerly OSA), the foremost professional association in optics and photonics worldwide. Fellow membership in Optica is limited to no more than ten percent of the membership and is reserved for members who have served with distinction in the advancement of optics and photonics. Koike-Akino is one of 106 members from 24 countries in Optica’s 2022 Fellows Class, elected during the Board of Directors of Optica meeting held on 2nd of November, 2021.

        “Congratulations to the 2022 Optica Fellows,” said 2021 President Connie Chang-Hasnain, University of California, Berkeley, USA. “These members exemplify what it means to be a leader in optics and photonics. Your election, by your peers, confirms the important contributions made within our field. Thank you for your dedication to Optica, and for advancing the science of light.”

        Koike-Akino's elevation to Fellow is specifically “for outstanding and innovative contributions to R&D in enabling technologies for optical communications, including nonlinear equalizers, high-dimensional modulations, and FEC (Forward Error Correction),” said Meredith Smith, Director, Optica Awards and Honors Office. "Again, congratulations on joining this esteemed group of Optica members."

        About Optica

        Optica (formerly OSA) is dedicated to promoting the generation, application, archiving and dissemination of knowledge in optics and photonics worldwide. Founded in 1916, it is the leading organization for scientists, engineers, business professionals, students and others interested in the science of light. Optica’s renowned publications, meetings, online resources and in-person activities fuel discoveries, shape real-life applications and accelerate scientific, technical and educational achievement.
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    •  AWARD    MERL Ranked 1st Place in Cross-Subject Transfer Learning Task and 4th Place Overall at the NeurIPS2021 BEETL Competition for EEG Transfer Learning.
      Date: November 11, 2021
      Awarded to: Niklas Smedemark-Margulies, Toshiaki Koike-Akino, Ye Wang, Deniz Erdogmus
      MERL Contacts: Toshiaki Koike-Akino; Ye Wang
      Research Areas: Artificial Intelligence, Signal Processing, Human-Computer Interaction
      Brief
      • The MERL Signal Processing group achieved first place in the cross-subject transfer learning task and fourth place overall in the NeurIPS 2021 BEETL AI Challenge for EEG Transfer Learning. The team included Niklas Smedemark-Margulies (intern from Northeastern University), Toshiaki Koike-Akino, Ye Wang, and Prof. Deniz Erdogmus (Northeastern University). The challenge addresses two types of transfer learning tasks for EEG Biosignals: a homogeneous transfer learning task for cross-subject domain adaptation; and a heterogeneous transfer learning task for cross-data domain adaptation. There were 110+ registered teams in this competition, MERL ranked 1st in the homogeneous transfer learning task, 7th place in the heterogeneous transfer learning task, and 4th place for the combined overall score. For the homogeneous transfer learning task, MERL developed a new pre-shot learning framework based on feature disentanglement techniques for robustness against inter-subject variation to enable calibration-free brain-computer interfaces (BCI). MERL is invited to present our pre-shot learning technique at the NeurIPS 2021 workshop.
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    •  AWARD    MERL researchers presented 5 papers at the 2016 Optical Fiber Communication Conference (OFC), including one "Top Scored" paper
      Date: March 24, 2016
      Awarded to: Toshiaki Koike-Akino, Keisuke Kojima, David S. Millar, Kieran Parsons, Tsuyoshi Yoshida, Takashi Sugihara
      MERL Contacts: Toshiaki Koike-Akino; Kieran Parsons
      Research Areas: Communications, Electronic and Photonic Devices, Signal Processing
      Brief
      • Five papers from the Optical Comms team were presented at the 2016 Optical Fiber Conference (OFC) held in Anaheim, USA in March 2016. The papers relate to enhanced modulation formats, constellation shaping, chromatic dispersion estimation, low complexity adaptive equalization and coding for coherent optical links. The top-scored paper studied optimal selection of coding and modulation sets to jointly maximize nonlinear tolerance and spectral efficiency.
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    •  AWARD    TELECOM Systems Technology Award
      Date: January 1, 2011
      Awarded to: Toshiaki Koike-Akino
      Awarded for: his recent papers
      Awarded by: Telecommunications Advancement Foundation of Japan
      MERL Contact: Toshiaki Koike-Akino
      Research Area: Communications
      Brief
      • MERL researcher Toshiaki Koike was granted a "TELECOM Systems Technology Award" for by the Telecommunications Advancement Foundation of Japan.
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    •  AWARD    GLOBECOM 2009 Best Paper Award
      Date: November 1, 2009
      Awarded to: Toshiaki Koike-Akino, Andreas Molisch, Zhifeng Tao, Philip Orlik and Toshiyuki Kuze
      Awarded for: "Unified Analysis of Linear Block Precoding for Distributed Antenna Systems"
      Awarded by: Global Telecommunications Conference (GLOBECOM)
      MERL Contacts: Toshiaki Koike-Akino; Philip V. Orlik
      Research Area: Communications
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  • Research Highlights

  • Internships with Toshi

    • CI1950: Quantum Machine Learning

      MERL is seeking an intern to work on research for quantum machine learning (QML). The ideal candidate is an experienced PhD student or post-graduate researcher having an excellent background in quantum computing, deep learning, and signal processing. Proficient programming skills with PyTorch and PennyLane will be additional assets to this position.

    • CI2049: Efficient/Green AI

      MERL is seeking highly motivated and qualified interns to work on efficient machine learning techniques. The ideal candidates would have significant research experience in federated learning, generative large language models, and efficient/green AI. A mature understanding of modern machine learning methods, proficiency with Python, and familiarity with deep learning frameworks are expected. Candidates at or beyond the middle of their Ph.D. program are encouraged to apply. The expected duration is 3 months long with flexible start dates.

    • CI2075: Human-Machine Interface with Biosignal Processing

      MERL is seeking an intern to work on research for human-machine interface with multi-modal bio-sensors. The ideal candidate is an experienced PhD student or post-graduate researcher having an excellent background in brain-machine interface (BMI), deep learning, mixed reality (XR), remote robot manipulation, bionics, and bio sensing. The expected duration of the internship is 3-6 months, with a flexible start date.

    See All Internships at MERL

  • MERL Publications

    •  Fujihashi, T., Koike-Akino, T., Watanabe, T., "Rateless Deep Graph Joint Source Channel Coding for Holographic-Type Communication", IEEE Global Communications Conference (GLOBECOM), December 2023.
      BibTeX TR2023-139 PDF
      • @inproceedings{Fujihashi2023dec,
      • author = {Fujihashi, Takuya and Koike-Akino, Toshiaki and Watanabe, Takashi},
      • title = {Rateless Deep Graph Joint Source Channel Coding for Holographic-Type Communication},
      • booktitle = {IEEE Global Communications Conference (GLOBECOM)},
      • year = 2023,
      • month = dec,
      • url = {https://www.merl.com/publications/TR2023-139}
      • }
    •  Xu, Y., Wang, B., Sakamoto, Y., Yamamoto, T., Nishimura, Y., Koike-Akino, T., Wang, Y., "Electric Machine Inverse Design with Variational Auto-Encoder (VAE)", IEEE Energy Conversion Congress and Exposition (ECCE), October 2023.
      BibTeX TR2023-134 PDF
      • @inproceedings{Xu2023nov,
      • author = {Xu, Yihao and Wang, Bingnan and Sakamoto, Yusuke and Yamamoto, Tatsuya and Nishimura, Yuki and Koike-Akino, Toshiaki and Wang, Ye},
      • title = {Electric Machine Inverse Design with Variational Auto-Encoder (VAE)},
      • booktitle = {IEEE Energy Conversion Congress and Exposition (ECCE)},
      • year = 2023,
      • month = oct,
      • url = {https://www.merl.com/publications/TR2023-134}
      • }
    •  Smedemark-Margulies, N., Wang, Y., Koike-Akino, T., Liu, J., Parsons, K., Bicer, Y., Erdogmus, D., "Stabilizing Subject Transfer in EEG Classification with Divergence Estimation", arXiv, October 2023.
      BibTeX arXiv
      • @article{Smedemark-Margulies2023oct,
      • author = {Smedemark-Margulies, Niklas and Wang, Ye and Koike-Akino, Toshiaki and Liu, Jing and Parsons, Kieran and Bicer, Yunus and Erdogmus, Deniz},
      • title = {Stabilizing Subject Transfer in EEG Classification with Divergence Estimation},
      • journal = {arXiv},
      • year = 2023,
      • month = oct,
      • url = {https://arxiv.org/abs/2310.08762}
      • }
    •  Nair, N.G., Cherian, A., Lohit, S., Wang, Y., Koike-Akino, T., Patel, V.M., Marks, T.K., "Steered Diffusion: A Generalized Framework for Plug-and-Play Conditional Image Synthesis", IEEE International Conference on Computer Vision (ICCV), October 2023.
      BibTeX TR2023-126 PDF Presentation
      • @inproceedings{Nair2023sep,
      • author = {Nair, Nithin Gopalakrishnan and Cherian, Anoop and Lohit, Suhas and Wang, Ye and Koike-Akino, Toshiaki and Patel, Vishal M. and Marks, Tim K.},
      • title = {Steered Diffusion: A Generalized Framework for Plug-and-Play Conditional Image Synthesis},
      • booktitle = {IEEE International Conference on Computer Vision (ICCV)},
      • year = 2023,
      • month = oct,
      • url = {https://www.merl.com/publications/TR2023-126}
      • }
    •  Duan, X., Wang, Y., Romeres, D., Koike-Akino, T., Orlik, P.V., "Trajectory Generation for Online Payload Estimation of Robot Manipulators: A Supervised Learning Based Approach", IEEE Conference on Automation and Science Engineering, DOI: 10.1109/​CASE56687.2023.10260415, August 2023.
      BibTeX TR2023-106 PDF
      • @inproceedings{Duan2023aug,
      • author = {Duan, Xiaoming and Wang, Yebin and Romeres, Diego and Koike-Akino, Toshiaki and Orlik, Philip V.},
      • title = {Trajectory Generation for Online Payload Estimation of Robot Manipulators: A Supervised Learning Based Approach},
      • booktitle = {IEEE Conference on Automation and Science Engineering},
      • year = 2023,
      • month = aug,
      • doi = {10.1109/CASE56687.2023.10260415},
      • isbn = {979-8-3503-2070-1},
      • url = {https://www.merl.com/publications/TR2023-106}
      • }
    See All Publications for Toshi

  • Other Publications

    •  Toshiaki Koike-Akino, "Adaptive network coding in two-way relaying MIMO system", Proc. The IEEE Global Telecommunications Conference (GLOBECOM), December 2010.
      BibTeX
      • @Inproceedings{Koike2010GLOBECOM12nc,
      • author = {Koike-Akino, Toshiaki},
      • title = {Adaptive network coding in two-way relaying MIMO system},
      • booktitle = {Proc. The IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2010,
      • address = {Miami},
      • month = dec
      • }
    •  Toshiaki Koike-Akino, Takashi Hamahata, Toshiro Akino and Takeharu Goji Etoh, "Device simulation and experimental measurement of high--voltage U--CBiCMOS buffer driver for ultra--high--speed CCD image sensors", Proc. The 15th Workshop on Synthesis And System Integration of Mixed Information technologies (SASIMI), October 2010.
      BibTeX
      • @Inproceedings{Koike2010SASIMI10,
      • author = {Koike-Akino, Toshiaki and Hamahata, Takashi and Akino, Toshiro and Etoh, Takeharu Goji},
      • title = {Device simulation and experimental measurement of high--voltage U--CBiCMOS buffer driver for ultra--high--speed CCD image sensors},
      • booktitle = {Proc. The 15th Workshop on Synthesis And System Integration of Mixed Information technologies (SASIMI)},
      • year = 2010,
      • month = oct
      • }
    •  Takeharu Goji Etoh, Dao Vu Truong Son, Toshiaki Koike-Akino, Toshiro Akino, Masatoshi Kureta and Masatoshi Arai, "Ultra-high-speed image signal accumulation sensor", Sensors Journal, Vol. 10, No. 4, pp. 1-15, August 2010.
      BibTeX
      • @Article{Koike2010Sensors08,
      • author = {Etoh, Takeharu Goji and Son, Dao Vu Truong and Koike-Akino, Toshiaki and Akino, Toshiro and Kureta, Masatoshi and Arai, Masatoshi},
      • title = {Ultra-high-speed image signal accumulation sensor},
      • journal = {Sensors Journal},
      • year = 2010,
      • volume = 10,
      • number = 4,
      • pages = {1--15},
      • month = aug
      • }
    •  Jesper H. Sørensen, Rasmus Krigslund, Petar Popovski, Toshiaki Koike Akino and Torben Larsen, "Scalable denoise-and-forward in bidirectional relay networks", Computer Networks, Vol. 54, No. 10, pp. 1607-1614, July 2010.
      BibTeX
      • @Article{Koike2010CNet07,
      • author = {Sorensen, Jesper H. and Krigslund, Rasmus and Popovski, Petar and Koike Akino, Toshiaki and Larsen, Torben},
      • title = {Scalable denoise-and-forward in bidirectional relay networks},
      • journal = {Computer Networks},
      • year = 2010,
      • volume = 54,
      • number = 10,
      • pages = {1607--1614},
      • month = jul
      • }
    •  Peter Larsson, Besma Smida, Toshiaki Koike-Akino and Vahid Tarokh, "Analysis of network coded HARQ for multiple unicast flows", Proc. The IEEE International Conference on Communications (ICC), June 2010.
      BibTeX
      • @Inproceedings{Koike2010ICC06,
      • author = {Larsson, Peter and Smida, Besma and Koike-Akino, Toshiaki and Tarokh, Vahid},
      • title = {Analysis of network coded HARQ for multiple unicast flows},
      • booktitle = {Proc. The IEEE International Conference on Communications (ICC)},
      • year = 2010,
      • month = jun
      • }
    •  Toshiaki Koike-Akino, "SAR analysis in dispersive tissues for in vivo UWB body area networks", Proc. The IEEE Global Telecommunications Conference (GLOBECOM), December 2009, pp. 1-6.
      BibTeX
      • @Inproceedings{Koike2009GLOBECOM12fdtd,
      • author = {Koike-Akino, Toshiaki},
      • title = {SAR analysis in dispersive tissues for in vivo UWB body area networks},
      • booktitle = {Proc. The IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2009,
      • pages = {1--6},
      • address = {Honolulu, Hawaii},
      • month = dec
      • }
    •  Toshiaki Koike-Akino, Petar Popovski and Vahid Tarokh, "Optimized precoding for adaptive modulation and network coding in bidirectional relaying", Proc. The IEEE Global Telecommunications Conference (GLOBECOM), December 2009, pp. 1-6.
      BibTeX
      • @Inproceedings{Koike2009GLOBECOM12nc,
      • author = {Koike-Akino, Toshiaki and Popovski, Petar and Tarokh, Vahid},
      • title = {Optimized precoding for adaptive modulation and network coding in bidirectional relaying},
      • booktitle = {Proc. The IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2009,
      • pages = {1--6},
      • address = {Honolulu, Hawaii},
      • month = dec
      • }
    •  Toshiaki Koike-Akino, Peter Larsson, Petar Popovski and Vahid Tarokh, "Non--linear network coding in two--way relaying discrete channels", Proc. The International Conference on Wireless Communications and Signal Processing (WCSP), December 2009.
      BibTeX
      • @Inproceedings{Koike2009WCSP12,
      • author = {Koike-Akino, Toshiaki and Larsson, Peter and Popovski, Petar and Tarokh, Vahid},
      • title = {Non--linear network coding in two--way relaying discrete channels},
      • booktitle = {Proc. The International Conference on Wireless Communications and Signal Processing (WCSP)},
      • year = 2009,
      • address = {Nanjing, China},
      • month = dec
      • }
    •  Toshiaki Koike-Akino, Natasha Devroye and Vahid Tarokh, "Frequency-domain bit-flipping equalizer for wideband MIMO channels", IEEE Transactions on Wireless Communications, Vol. 8, No. 10, pp. 4969-4973, October 2009.
      BibTeX
      • @Article{Koike2009TWC10,
      • author = {Koike-Akino, Toshiaki and Devroye, Natasha and Tarokh, Vahid},
      • title = {Frequency-domain bit-flipping equalizer for wideband MIMO channels},
      • journal = {IEEE Transactions on Wireless Communications},
      • year = 2009,
      • volume = 8,
      • number = 10,
      • pages = {4969--4973},
      • month = oct
      • }
    •  Toshiaki Koike, "Space-Time-Frequency Signal Processing for Spectrum-efficient Multiple-antenna Wireless Transmission Systems", September 2009, Kyoto University.
      BibTeX
      • @Phdthesis{Koike2009PhD09,
      • author = {Koike, Toshiaki},
      • title = {Space-Time-Frequency Signal Processing for Spectrum-efficient Multiple-antenna Wireless Transmission Systems},
      • school = {Kyoto University},
      • year = 2009,
      • month = sep
      • }
    •  Jesper H. Sørensen, Rasmus Krigslund, Petar Popovski, Toshiaki Koike Akino and Torben Larsen, "Physical layer network coding for FSK systems", IEEE Communications Letters, Vol. 13, No. 8, pp. 597-599, August 2009.
      BibTeX
      • @Article{Koike2009COMLET08,
      • author = {Sorensen, Jesper H. and Krigslund, Rasmus and Popovski, Petar and Koike Akino, Toshiaki and Larsen, Torben},
      • title = {Physical layer network coding for FSK systems},
      • journal = {IEEE Communications Letters},
      • year = 2009,
      • volume = 13,
      • number = 8,
      • pages = {597--599},
      • month = aug
      • }
    •  Toshiaki Koike-Akino, Petar Popovski and Vahid Tarokh, "Denoising strategy for convolutionally--coded bidirectional relaying", Proc. The IEEE International Conference on Communications (ICC), June 2009, pp. 1-5.
      BibTeX
      • @Inproceedings{Koike2009ICC06nc,
      • author = {Koike-Akino, Toshiaki and Popovski, Petar and Tarokh, Vahid},
      • title = {Denoising strategy for convolutionally--coded bidirectional relaying},
      • booktitle = {Proc. The IEEE International Conference on Communications (ICC)},
      • year = 2009,
      • pages = {1--5},
      • address = {Dresden, Germany},
      • month = jun
      • }
    •  Toshiaki Koike-Akino and Vahid Tarokh, "Sphere packing optimization and EXIT chart analysis for multi--dimensional QAM signaling", Proc. The IEEE International Conference on Communications (ICC), June 2009, pp. 1-5.
      BibTeX
      • @Inproceedings{Koike2009ICC06sp,
      • author = {Koike-Akino, Toshiaki and Tarokh, Vahid},
      • title = {Sphere packing optimization and EXIT chart analysis for multi--dimensional QAM signaling},
      • booktitle = {Proc. The IEEE International Conference on Communications (ICC)},
      • year = 2009,
      • pages = {1--5},
      • address = {Dresden, Germany},
      • month = jun
      • }
    •  Toshiaki Koike-Akino, Petar Popovski and Vahid Tarokh, "Optimized constellations for two--way wireless relaying with physical network coding", IEEE Journal on Selected Areas in Communications, Vol. 27, No. 5, pp. 773-787, June 2009.
      BibTeX
      • @Article{Koike2009JSAC06,
      • author = {Koike-Akino, Toshiaki and Popovski, Petar and Tarokh, Vahid},
      • title = {Optimized constellations for two--way wireless relaying with physical network coding},
      • journal = {IEEE Journal on Selected Areas in Communications},
      • year = 2009,
      • volume = 27,
      • number = 5,
      • pages = {773--787},
      • month = jun
      • }
    •  Toshiaki Koike-Akino, "Low-complexity systolic V-BLAST architecture", IEEE Transactions on Wireless Communications, Vol. 8, No. 5, pp. 2172-2176, May 2009.
      BibTeX
      • @Article{Koike2009TWC05,
      • author = {Koike-Akino, Toshiaki},
      • title = {Low-complexity systolic V-BLAST architecture},
      • journal = {IEEE Transactions on Wireless Communications},
      • year = 2009,
      • volume = 8,
      • number = 5,
      • pages = {2172--2176},
      • month = may
      • }
    •  Petar Popovski and Toshiaki Koike-Akino, "Coded Bidirectional Relaying in Wireless Networks" in New Directions in Wireless Communications, Tarokh, Vahid, Eds., pp. 291-316, Springer, 2009.
      BibTeX
      • @Incollection{Koike2009Springer,
      • author = {Popovski, Petar and Koike-Akino, Toshiaki},
      • title = {Coded Bidirectional Relaying in Wireless Networks},
      • booktitle = {New Directions in Wireless Communications},
      • year = 2009,
      • editor = {Tarokh, Vahid},
      • pages = {291--316},
      • publisher = {Springer}
      • }
    •  Toshiaki Koike-Akino, "Optimum-weighted RLS channel estimation for rapid fading MIMO channels", IEEE Transactions on Wireless Communications, Vol. 7, No. 11, pp. 4248-4260, November 2008.
      BibTeX
      • @Article{Koike2008TWC11,
      • author = {Koike-Akino, Toshiaki},
      • title = {Optimum-weighted RLS channel estimation for rapid fading MIMO channels},
      • journal = {IEEE Transactions on Wireless Communications},
      • year = 2008,
      • volume = 7,
      • number = 11,
      • pages = {4248--4260},
      • month = nov
      • }
    •  Toshiaki Koike-Akino, Petar Popovski and Vahid Tarokh, "Two--way relaying with network coding for frequency--selective fading channels", Proc. The 42nd Asilomar Conference on Signals, Systems, and Computers, October 2008, pp. 2221-2225.
      BibTeX
      • @Inproceedings{Koike2008Asilomar08,
      • author = {Koike-Akino, Toshiaki and Popovski, Petar and Tarokh, Vahid},
      • title = {Two--way relaying with network coding for frequency--selective fading channels},
      • booktitle = {Proc. The 42nd Asilomar Conference on Signals, Systems, and Computers},
      • year = 2008,
      • pages = {2221--2225},
      • address = {Pacific Grove, CA},
      • month = oct
      • }
    •  Toshiaki Koike-Akino, "Bit-flipping equalizer and ML search-space analysis for ultra-wideband MIMO channels", Proc. The IEEE Global Telecommunications Conference (GLOBECOM), Nov.--Dec. 2008, pp. 1-5.
      BibTeX
      • @Inproceedings{Koike2008GLOBECOM11ml,
      • author = {Koike-Akino, Toshiaki},
      • title = {Bit-flipping equalizer and ML search-space analysis for ultra-wideband MIMO channels},
      • booktitle = {Proc. The IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2008,
      • pages = {1--5},
      • address = {New Orleans, LA},
      • month = {Nov.--Dec.}
      • }
    •  Toshiaki Koike-Akino, Petar Popovski and Vahid Tarokh, "Denoising maps and constellations for wireless network coding in two--way relaying systems", Proc. The IEEE Global Telecommunications Conference (GLOBECOM), Nov.--Dec. 2008, pp. 1-5.
      BibTeX
      • @Inproceedings{Koike2008GLOBECOM11nc,
      • author = {Koike-Akino, Toshiaki and Popovski, Petar and Tarokh, Vahid},
      • title = {Denoising maps and constellations for wireless network coding in two--way relaying systems},
      • booktitle = {Proc. The IEEE Global Telecommunications Conference (GLOBECOM)},
      • year = 2008,
      • pages = {1--5},
      • address = {New Orleans, LA},
      • month = {Nov.--Dec.}
      • }
    •  Toshiaki Koike-Akino, "Optimum-weighted RLS channel estimation for time-varying fast fading MIMO channels", Proc. The IEEE International Conference on Communications (ICC), June 2007, pp. 5015-5020.
      BibTeX
      • @Inproceedings{Koike2007ICC06,
      • author = {Koike-Akino, Toshiaki},
      • title = {Optimum-weighted RLS channel estimation for time-varying fast fading MIMO channels},
      • booktitle = {Proc. The IEEE International Conference on Communications (ICC)},
      • year = 2007,
      • pages = {5015--5020},
      • address = {Glasgow, Scotland},
      • month = jun
      • }
    •  Toshiaki Koike and Susumu Yoshida, "Iterative FDE for DD-based cooperative relaying with FD-STBC in quasi-synchronous networks", Proc. The 17th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), September 2006.
      BibTeX
      • @Inproceedings{Koike2006PIMRC09,
      • author = {Koike, Toshiaki and Yoshida, Susumu},
      • title = {Iterative FDE for DD-based cooperative relaying with FD-STBC in quasi-synchronous networks},
      • booktitle = {Proc. The 17th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)},
      • year = 2006,
      • address = {Helsinki, Finland},
      • month = sep
      • }
    •  Toshiaki Koike Akino, "Low-complexity architecture of MMSE/V-BLAST with recurrence formula for systolic weights generation", Proc. The 9th International Symposium on Wireless Personal Multimedia Communications (WPMC), September 2006.
      BibTeX
      • @Inproceedings{Koike2006WPMC09blast,
      • author = {Koike Akino, Toshiaki},
      • title = {Low-complexity architecture of MMSE/V-BLAST with recurrence formula for systolic weights generation},
      • booktitle = {Proc. The 9th International Symposium on Wireless Personal Multimedia Communications (WPMC)},
      • year = 2006,
      • address = {San Diego},
      • month = sep
      • }
    •  Kohei Kiyoshima, Toshiaki Koike and Susumu Yoshida, "Algorithm-diversity of MIMO-MMSE with multiple channel estimation schemes for fast fading channels", Proc. The 9th International Symposium on Wireless Personal Multimedia Communications (WPMC), September 2006.
      BibTeX
      • @Inproceedings{Koike2006WPMC09mmse,
      • author = {Kiyoshima, Kohei and Koike, Toshiaki and Yoshida, Susumu},
      • title = {Algorithm-diversity of MIMO-MMSE with multiple channel estimation schemes for fast fading channels},
      • booktitle = {Proc. The 9th International Symposium on Wireless Personal Multimedia Communications (WPMC)},
      • year = 2006,
      • address = {San Diego},
      • month = sep
      • }
    •  Toshiaki Koike, Yukinaga Seki, Hidekazu Murata, Susumu Yoshida and Kiyomichi Araki, "Prototype implementation of real-time ML detectors for spatial multiplexing transmission", IEICE Transactions on Communications, Vol. E89-B, No. 3, pp. 845-852, March 2006.
      BibTeX
      • @Article{Koike2006TCOM03fpga,
      • author = {Koike, Toshiaki and Seki, Yukinaga and Murata, Hidekazu and Yoshida, Susumu and Araki, Kiyomichi},
      • title = {Prototype implementation of real-time ML detectors for spatial multiplexing transmission},
      • journal = {IEICE Transactions on Communications},
      • year = 2006,
      • volume = {E89-B},
      • number = 3,
      • pages = {845--852},
      • month = mar
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Experimental evaluation of spatial interleaving in trellis-coded MIMO systems", IEICE Transactions on Communications, Vol. E89-B, No. 3, pp. 985-989, March 2006.
      BibTeX
      • @Article{Koike2006TCOM03tcc,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Experimental evaluation of spatial interleaving in trellis-coded MIMO systems},
      • journal = {IEICE Transactions on Communications},
      • year = 2006,
      • volume = {E89-B},
      • number = 3,
      • pages = {985--989},
      • month = mar
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Adaptive MLSE equalizer with per-survivor QR decomposition for trellis-coded MIMO transmission", Kluwer Journals on Wireless Personal Communications, Vol. 35, pp. 213-225, October 2005.
      BibTeX
      • @Article{Koike2005Kluwer10,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Adaptive MLSE equalizer with per-survivor QR decomposition for trellis-coded MIMO transmission},
      • journal = {Kluwer Journals on Wireless Personal Communications},
      • year = 2005,
      • volume = 35,
      • pages = {213--225},
      • month = oct
      • }
    •  Toshiaki Koike, Yukinaga Seki, Hidekazu Murata, Susumu Yoshida and Kiyomichi Araki, "FPGA prototyping of MIMO detector for over-1Gbps wireless transmissions", Proc. Union Radio-Scientifique Internationale General Assembly (URSI-GA), October 2005.
      BibTeX
      • @Inproceedings{Koike2005URSI-GA10,
      • author = {Koike, Toshiaki and Seki, Yukinaga and Murata, Hidekazu and Yoshida, Susumu and Araki, Kiyomichi},
      • title = {FPGA prototyping of MIMO detector for over-1Gbps wireless transmissions},
      • booktitle = {Proc. Union Radio-Scientifique Internationale General Assembly (URSI-GA)},
      • year = 2005,
      • address = {New Delhi, India},
      • month = oct
      • }
    •  Toshiaki Koike, Masakazu Tanaka and Susumu Yoshida, "Capacity improvement of multihop inter-vehicle communication networks by STBC cooperative relaying", IEICE Transactions on Communications, Vol. E88-B, No. 9, pp. 3546-3553, September 2005.
      BibTeX
      • @Article{Koike2005TCOM09,
      • author = {Koike, Toshiaki and Tanaka, Masakazu and Yoshida, Susumu},
      • title = {Capacity improvement of multihop inter-vehicle communication networks by STBC cooperative relaying},
      • journal = {IEICE Transactions on Communications},
      • year = 2005,
      • volume = {E88-B},
      • number = 9,
      • pages = {3546--3553},
      • month = sep
      • }
    •  Toshiaki Koike and Susumu Yoshida, "Approximated ML detector using Hopfield neural network in MIMO spatial multiplexing systems", Proc. The 8th International Symposium on Wireless Personal Multimedia Communications (WPMC), September 2005.
      BibTeX
      • @Inproceedings{Koike2005WPMC09,
      • author = {Koike, Toshiaki and Yoshida, Susumu},
      • title = {Approximated ML detector using Hopfield neural network in MIMO spatial multiplexing systems},
      • booktitle = {Proc. The 8th International Symposium on Wireless Personal Multimedia Communications (WPMC)},
      • year = 2005,
      • address = {Aalborg, Denmark},
      • month = sep
      • }
    •  Toshiaki Koike, Masakazu Tanaka and Susumu Yoshida, "System-level evaluation of STC cooperative relaying scheme in multihop IVC networks", Proc. The 2nd IEEE Asia Pacific Wireless Communications Symposium (APWCS), August 2005.
      BibTeX
      • @Inproceedings{Koike2005APWCS08,
      • author = {Koike, Toshiaki and Tanaka, Masakazu and Yoshida, Susumu},
      • title = {System-level evaluation of STC cooperative relaying scheme in multihop IVC networks},
      • booktitle = {Proc. The 2nd IEEE Asia Pacific Wireless Communications Symposium (APWCS)},
      • year = 2005,
      • address = {Sapporo, Japan},
      • month = aug
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Genetic design method for near-optimal training sequences in multiple antenna systems", IEICE Transactions on Communications, Vol. E88-B, No. 8, pp. 3488-3492, August 2005.
      BibTeX
      • @Article{Koike2005TCOM08,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Genetic design method for near-optimal training sequences in multiple antenna systems},
      • journal = {IEICE Transactions on Communications},
      • year = 2005,
      • volume = {E88-B},
      • number = 8,
      • pages = {3488--3492},
      • month = aug
      • }
    •  Yasumori Nouda, Toshiaki Koike and Susumu Yoshida, "Iterative MLD equalizer preceded by MIMO-FDE for wideband spatial multiplexing systems", Proc. The 61st IEEE Vehicular Technology Conference (VTC-Spring), May--June 2005, vol. 1, pp. 533-537.
      BibTeX
      • @Inproceedings{Koike2005VTC05fde,
      • author = {Nouda, Yasumori and Koike, Toshiaki and Yoshida, Susumu},
      • title = {Iterative MLD equalizer preceded by MIMO-FDE for wideband spatial multiplexing systems},
      • booktitle = {Proc. The 61st IEEE Vehicular Technology Conference (VTC-Spring)},
      • year = 2005,
      • volume = 1,
      • pages = {533--537},
      • address = {Stockholm, Sweden},
      • month = {May--June}
      • }
    •  Toshiaki Koike, Yukinaga Seki, Hidekazu Murata, Susumu Yoshida and Kiyomichi Araki, "FPGA implementation of 1Gbps real-time 4x4 MIMO-MLD", Proc. The 61st IEEE Vehicular Technology Conference (VTC-Spring), May--June 2005, vol. 2, pp. 1110-1114.
      BibTeX
      • @Inproceedings{Koike2005VTC05fpga,
      • author = {Koike, Toshiaki and Seki, Yukinaga and Murata, Hidekazu and Yoshida, Susumu and Araki, Kiyomichi},
      • title = {FPGA implementation of 1Gbps real-time 4x4 MIMO-MLD},
      • booktitle = {Proc. The 61st IEEE Vehicular Technology Conference (VTC-Spring)},
      • year = 2005,
      • volume = 2,
      • pages = {1110--1114},
      • address = {Stockholm, Sweden},
      • month = {May--June}
      • }
    •  Toshiaki Koike, Daisuke Nishikawa and Susumu Yoshida, "Metric-segmented low-complexity ML detection for spectrum-efficient multiple-antenna systems", Proc. The 61st IEEE Vehicular Technology Conference (VTC-Spring), May--June 2005, vol. 3, pp. 1642-1646.
      BibTeX
      • @Inproceedings{Koike2005VTC05ml,
      • author = {Koike, Toshiaki and Nishikawa, Daisuke and Yoshida, Susumu},
      • title = {Metric-segmented low-complexity ML detection for spectrum-efficient multiple-antenna systems},
      • booktitle = {Proc. The 61st IEEE Vehicular Technology Conference (VTC-Spring)},
      • year = 2005,
      • volume = 3,
      • pages = {1642--1646},
      • address = {Stockholm, Sweden},
      • month = {May--June}
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Frequency-domain SC/MMSE iterative equalizer with MF approximation in LDPC-coded MIMO transmissions", Proc. The 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), September 2004, vol. 2, pp. 1414-1418.
      BibTeX
      • @Inproceedings{Koike2004PIMRC09,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Frequency-domain SC/MMSE iterative equalizer with MF approximation in LDPC-coded MIMO transmissions},
      • booktitle = {Proc. The 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)},
      • year = 2004,
      • volume = 2,
      • pages = {1414--1418},
      • address = {Barcelona, Spain},
      • month = sep
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "MLSE adaptive equalizer with per-survivor QR decomposition for trellis-coded MIMO transmissions", Proc. The 7th International Symposium on Wireless Personal Multimedia Communications (WPMC), September 2004.
      BibTeX
      • @Inproceedings{Koike2004WPMC09,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {MLSE adaptive equalizer with per-survivor QR decomposition for trellis-coded MIMO transmissions},
      • booktitle = {Proc. The 7th International Symposium on Wireless Personal Multimedia Communications (WPMC)},
      • year = 2004,
      • address = {Abano Terme, Itary},
      • month = sep
      • }
    •  Toshiaki Koike and Susumu Yoshida, "Space-time trellis-coded ternary PSK for mobile communications", IEE Electronics Letters, Vol. 40, No. 16, pp. 1011-1012, August 2004.
      BibTeX
      • @Article{Koike2004ELET08,
      • author = {Koike, Toshiaki and Yoshida, Susumu},
      • title = {Space-time trellis-coded ternary PSK for mobile communications},
      • journal = {IEE Electronics Letters},
      • year = 2004,
      • volume = 40,
      • number = 16,
      • pages = {1011--1012},
      • month = aug
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Hybrid ARQ scheme suitable for coded MIMO transmission", Proc. The IEEE International Conference on Communications (ICC), June 2004, vol. 5, pp. 2919-2923.
      BibTeX
      • @Inproceedings{Koike2004ICC06,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Hybrid ARQ scheme suitable for coded MIMO transmission},
      • booktitle = {Proc. The IEEE International Conference on Communications (ICC)},
      • year = 2004,
      • volume = 5,
      • pages = {2919--2923},
      • address = {Paris, France},
      • month = jun
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Evaluation of HARQ scheme with antenna permutation and TCM reassignment for space-time transmission in slow Nakagami-Rice fading MIMO channel", IEICE Transactions on Communications, Vol. E87-B, No. 6, pp. 1487-1494, June 2004.
      BibTeX
      • @Article{Koike2004TCOM06,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Evaluation of HARQ scheme with antenna permutation and TCM reassignment for space-time transmission in slow Nakagami-Rice fading MIMO channel},
      • journal = {IEICE Transactions on Communications},
      • year = 2004,
      • volume = {E87-B},
      • number = 6,
      • pages = {1487--1494},
      • month = jun
      • }
    •  Toshiaki Koike and Susumu Yoshida, "Genetic designing of near-optimal training sequences for spatial multiplexing transmissions", Proc. The Joint Conference of the 10th Asia-Pacific Conference on Communications, and the 5th International Symposium on Multi-Dimensional Mobile Communications (APCC/MDMC), Aug.--Sep. 2004, vol. 1, pp. 474-478.
      BibTeX
      • @Inproceedings{Koike2004APCC-MDMC08,
      • author = {Koike, Toshiaki and Yoshida, Susumu},
      • title = {Genetic designing of near-optimal training sequences for spatial multiplexing transmissions},
      • booktitle = {Proc. The Joint Conference of the 10th Asia-Pacific Conference on Communications, and the 5th International Symposium on Multi-Dimensional Mobile Communications (APCC/MDMC)},
      • year = 2004,
      • volume = 1,
      • pages = {474--478},
      • address = {Beijing, China},
      • month = {Aug.--Sep.}
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Space-time coded ternary phase shift keying", Proc. IEEE Joint Conference of the Fourth International Conference on Information, Communications and Signal Processing, and Fourth Pacific Rim Conference on Multimedia (ICICS-PCM), December 2003, vol. 2, pp. 864-868.
      BibTeX
      • @Inproceedings{Koike2003ICICS-PCM12,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Space-time coded ternary phase shift keying},
      • booktitle = {Proc. IEEE Joint Conference of the Fourth International Conference on Information, Communications and Signal Processing, and Fourth Pacific Rim Conference on Multimedia (ICICS-PCM)},
      • year = 2003,
      • volume = 2,
      • pages = {864--868},
      • address = {Singapore},
      • month = dec
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Laboratory experiments of coded space-time transmission with spatial interleaving for wireless MIMO channels", Proc. The 6th International Symposium on Wireless Personal Multimedia Communications (WPMC), October 2003.
      BibTeX
      • @Inproceedings{Koike2003WPMC10,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Laboratory experiments of coded space-time transmission with spatial interleaving for wireless MIMO channels},
      • booktitle = {Proc. The 6th International Symposium on Wireless Personal Multimedia Communications (WPMC)},
      • year = 2003,
      • address = {Yokosuka, Japan},
      • month = oct
      • }
    •  Toshiaki Koike, Hidekazu Murata and Susumu Yoshida, "Spatial interleaving for vector Viterbi equalizer with super-trellis decoding in trellis-coded space-time transmission", Proc. The 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), September 2003, vol. 2, pp. 1302-1306.
      BibTeX
      • @Inproceedings{Koike2003PIMRC09,
      • author = {Koike, Toshiaki and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Spatial interleaving for vector Viterbi equalizer with super-trellis decoding in trellis-coded space-time transmission},
      • booktitle = {Proc. The 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)},
      • year = 2003,
      • volume = 2,
      • pages = {1302--1306},
      • address = {Beijing, China},
      • month = sep
      • }
    •  Toshiaki Koike, Koutarou Shiizaki, Hidekazu Murata and Susumu Yoshida, "Experimental study of multi-user detector with trellis-coding for microcellular radio", Proc. The 5th International Symposium on Wireless Personal Multimedia Communications (WPMC), October 2002, vol. 3, pp. 1252-1256.
      BibTeX
      • @Inproceedings{Koike2002WPMC10,
      • author = {Koike, Toshiaki and Shiizaki, Koutarou and Murata, Hidekazu and Yoshida, Susumu},
      • title = {Experimental study of multi-user detector with trellis-coding for microcellular radio},
      • booktitle = {Proc. The 5th International Symposium on Wireless Personal Multimedia Communications (WPMC)},
      • year = 2002,
      • volume = 3,
      • pages = {1252--1256},
      • address = {Honolulu, Hawaii},
      • month = oct
      • }

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      Issue Date: Oct 22, 2019
    • Title: "Localization using Millimeter Wave Communication Signals"
      Inventors: Pajovic, Milutin; Koike-Akino, Toshiaki; Orlik, Philip V.
      Patent No.: 10,425,910
      Issue Date: Sep 24, 2019
    • Title: "Optical Signal Transmitter and Optical Signal Encoder Using Constant Modulus Formats, and Method for Generating Modulation Codes"
      Inventors: Kojima, Keisuke; Yoshida, Tsuyoshi; Koike-Akino, Toshiaki; Millar, David; Parsons, Kieran
      Patent No.: 10,320,486
      Issue Date: Jun 11, 2019
    • Title: "Irregular Polar Code Encoding"
      Inventors: Koike-Akino, Toshiaki; Wang, Ye; Draper, Stark C.
      Patent No.: 10,313,056
      Issue Date: Jun 4, 2019
    • Title: "Soft-Output Decoding of Codewords Encoded with Polar Code"
      Inventors: Wang, Ye; Koike-Akino, Toshiaki; Draper, Stark C.
      Patent No.: 10,312,946
      Issue Date: Jun 4, 2019
    • Title: "Compact Photonic Devices"
      Inventors: Kojima, Keisuke; Teng, Min; Koike-Akino, Toshiaki; Wang, Bingnan
      Patent No.: 10,234,627
      Issue Date: Mar 19, 2019
    • Title: "See-Through Sensing for Image Reconstruction of Structure of Target Object"
      Inventors: Wang, Pu; Koike-Akino, Toshiaki; Fu, Haoyu; Orlik, Philip V.
      Patent No.: 10,217,252
      Issue Date: Feb 26, 2019
    • Title: "Photonic Integrated Circuit"
      Inventors: Kojima, Keisuke; Nishikawa, Satoshi; Koike-Akino, Toshiaki; Wang, Bingnan; Yagyu, Eiji
      Patent No.: 10,120,132
      Issue Date: Nov 6, 2018
    • Title: "Partition Based Distribution Matcher for Probabilistic Constellation Shaping"
      Inventors: Millar, David; Fehenberger, Tobias; Koike-Akino, Toshiaki; Kojima, Keisuke; Parsons, Kieran
      Patent No.: 10,069,519
      Issue Date: Sep 4, 2018
    • Title: "System and Method for Spatial Beamforming Modulation"
      Inventors: Kim, Kyeong-Jin; Ding, Yacong; Koike-Akino, Toshiaki; Pajovic, Milutin; Orlik, Philip V.
      Patent No.: 9,948,377
      Issue Date: Apr 17, 2018
    • Title: "Frequency Domain Equalizer for Optical Communications"
      Inventors: Millar, David; Paskov, Milen; Koike-Akino, Toshiaki; Parsons, Kieran; Kojima, Keisuke
      Patent No.: 9,917,712
      Issue Date: Mar 13, 2018
    • Title: "Methods for Compensation of Cross-Polarization Modulation (XPolM) Impairments in Coherent Optical Communications"
      Inventors: Pajovic, Milutin; Parsons, Kieran; Millar, David; Koike-Akino, Toshiaki; Kojima, Keisuke
      Patent No.: 9,906,308
      Issue Date: Feb 27, 2018
    • Title: "System and Method of Belief Propagation Decoding"
      Inventors: Koike-Akino, Toshiaki; Millar, David
      Patent No.: 9,806,743
      Issue Date: Oct 31, 2017
    • Title: "Optical Signal Transmitter and Optical Communication System Using Constant Modulus Formats, and Method for Generating Modulation Codes"
      Inventors: Kojima, Keisuke; Yoshida, Tsuyoshi; Koike-Akino, Toshiaki; Millar, David; Parsons, Kieran
      Patent No.: 9,806,739
      Issue Date: Oct 31, 2017
    • Title: "System and Method for Linearizing Power Amplifiers"
      Inventors: Koike-Akino, Toshiaki; Zhu, Qiuyao; Ma, Rui; Teo, Koon Hoo
      Patent No.: 9,749,163
      Issue Date: Aug 29, 2017
    • Title: "Fast Log-Likelihood Ratio (LLR) Computation for Decoding High-Order and High-Dimensional Modulation Schemes"
      Inventors: Millar, David; Koike-Akino, Toshiaki; Kojima, Keisuke; Parsons, Kieran
      Patent No.: 9,749,089
      Issue Date: Aug 29, 2017
    • Title: "Method and System for Reliable Data Communications with Adaptive Multi-Dimensional Modulations for Variable-Iteration Decoding"
      Inventors: Koike-Akino, Toshiaki
      Patent No.: 9,722,633
      Issue Date: Aug 1, 2017
    • Title: "System and Method for Wireless Communications over Fading Channels"
      Inventors: Koike-Akino, Toshiaki; Orlik, Philip V.; Kim, Kyeong-Jin
      Patent No.: 9,716,536
      Issue Date: Jul 25, 2017
    • Title: "Method for Generating Constant Modulus Multi-Dimensional Modulations for Coherent Optical Communications"
      Inventors: Kojima, Keisuke; Millar, David; Koike-Akino, Toshiaki; Parsons, Kieran
      Patent No.: 9,621,275
      Issue Date: Apr 11, 2017
    • Title: "Quaternary Block-Coded High-Dimensional Modulation for Coherent Optical Communications"
      Inventors: Millar, David; Koike-Akino, Toshiaki
      Patent No.: 9,584,259
      Issue Date: Feb 28, 2017
    • Title: "Adaptive Error Correction Code for Optical Super-Channels"
      Inventors: Kojima, Keisuke; Parsons, Kieran; Millar, David; Koike-Akino, Toshiaki
      Patent No.: 9,584,256
      Issue Date: Feb 28, 2017
    • Title: "Pilot-Aided Coherent Receiver for Optical Communications"
      Inventors: Millar, David; Koike-Akino, Toshiaki; Pajovic, Milutin
      Patent No.: 9,559,786
      Issue Date: Jan 31, 2017
    • Title: "System and Method for Manipulating Polarizations of Optical Signal"
      Inventors: Kojima, Keisuke; Felicetti, Manuela; Koike-Akino, Toshiaki; Wang, Bingnan; Nishikawa, Satoshi; Yagyu, Eiji
      Patent No.: 9,557,485
      Issue Date: Jan 31, 2017
    • Title: "System and Method for Decoding Block of Data Received Over Communication Channel"
      Inventors: Kim, Kyeong-Jin; Orlik, Philip V.; Koike-Akino, Toshiaki
      Patent No.: 9,525,514
      Issue Date: Dec 20, 2016
    • Title: "System and Method for Recovering Carrier Phase in Optical Communications"
      Inventors: Koike-Akino, Toshiaki; Kojima, Keisuke; Millar, David
      Patent No.: 9,473,250
      Issue Date: Oct 18, 2016
    • Title: "RECEIVER, TRANSMITTER, AND COMMUNICATION METHOD"
      Inventors: Koike-Akino, Toshiaki; Matsumoto, Wataru; Sugihara, Kenya; Miyata, Yoshikuni; Sugihara, Takashi; Yoshida, Tsuyoshi
      Patent No.: 9,455,822
      Issue Date: Sep 27, 2016
    • Title: "Inter-Channel Interference Management for Optical Super-Channels"
      Inventors: Koike-Akino, Toshiaki; Kojima, Keisuke; Millar, David; Parsons, Kieran
      Patent No.: 9,432,124
      Issue Date: Aug 30, 2016
    • Title: "System and Method for Measuring Linewidth of Optical Signal"
      Inventors: Kojima, Keisuke; Koike-Akino, Toshiaki; Horiguchi, Yuichiro
      Patent No.: 9,369,204
      Issue Date: Jun 14, 2016
    • Title: "System and Method for Linearizing Power Amplifiers"
      Inventors: Koike-Akino, Toshiaki; Zhu, Qiuyao; Ma, Rui; Teo, Koon Hoo
      Patent No.: 9,270,504
      Issue Date: Feb 23, 2016
    • Title: "System and Method for Communicating Data Symbols via Wireless Doubly-Selective Channels"
      Inventors: Koike-Akino, Toshiaki; Orlik, Philip V.; Kim, Kyeong-Jin
      Patent No.: 9,264,118
      Issue Date: Feb 16, 2016
    • Title: "Method and System for Communicating Multimedia Using Reconfigurable Rateless Codes and Decoding In-Process Status Feedback"
      Inventors: Koike-Akino, Toshiaki; Orlik, Philip V.; Soerensen, Jesper H.
      Patent No.: 9,215,457
      Issue Date: Dec 15, 2015
    • Title: "Method and Apparatus for Detecting Symbols Received Wirelessly using Probabilistic Data Association with Uncertainty"
      Inventors: Orlik, Philip V.; Pajovic, Milutin; Kim, Kyeong-Jin; Koike-Akino, Toshiaki
      Patent No.: 9,184,876
      Issue Date: Nov 10, 2015
    • Title: "Multi-Mode Interference Device"
      Inventors: Kojima, Keisuke; Ozbayat, Selman; Koike-Akino, Toshiaki; Wang, Bingnan; Nishikawa, Satoshi; Yagyu, Eiji
      Patent No.: 9,116,298
      Issue Date: Aug 25, 2015
    • Title: "Method and System for Modulating Optical Signals as High-Dimensional Lattice Constellation Points to Increase Tolerance to Noise"
      Inventors: Koike-Akino, Toshiaki; Knyazev, Andrew ; Millar, David
      Patent No.: 9,112,653
      Issue Date: Aug 18, 2015
    • Title: "Multi-Mode Interference Device"
      Inventors: Koike-Akino, Toshiaki; Kojima, Keisuke; Wang, Bingnan; Nishikawa, Satoshi; Yagyu, Eiji
      Patent No.: 9,097,852
      Issue Date: Aug 4, 2015
    • Title: "Non-Coherent Transmission and Equalization in Doubly-Selective MIMO Channels"
      Inventors: Koike-Akino, Toshiaki; Orlik, Philip V.
      Patent No.: 9,088,447
      Issue Date: Jul 21, 2015
    • Title: "Adaptively Coding and Modulating Signals Transmitted Via Nonlinear Channels"
      Inventors: Koike-Akino, Toshiaki; Parsons, Kieran; Duan, Chunjie; Kojima, Keisuke
      Patent No.: 9,077,508
      Issue Date: Jul 7, 2015
    • Title: "Compound Optical Combiner"
      Inventors: Kojima, Keisuke; Wang, Bingnan; Koike-Akino, Toshiaki; Nishikawa, Satoshi; Yagyu, Eiji
      Patent No.: 9,052,461
      Issue Date: Jun 9, 2015
    • Title: "Multi-Mode Interference Manipulator"
      Inventors: Kojima, Keisuke; Wang, Bingnan; Koike-Akino, Toshiaki; Yuan, Wangqing; Nishikawa, Satoshi
      Patent No.: 8,942,517
      Issue Date: Jan 27, 2015
    • Title: "Reputation-Based Routing and Error-Correction Coding in Ad Hoc Networks"
      Inventors: Koike-Akino, Toshiaki; Duan, Chunjie
      Patent No.: 8,942,120
      Issue Date: Jan 27, 2015
    • Title: "Non-Coherent Space-Time Trellis-Coded Modulations for Network-Coded Wireless Relay Communications"
      Inventors: Koike-Akino, Toshiaki; Orlik, Philip V.
      Patent No.: 8,553,792
      Issue Date: Oct 8, 2013
    • Title: "Method for Generating Private Keys in Wireless Networks"
      Inventors: Liu, Wei; Duan, Chunjie; Koike-Akino, Toshiaki; Annavajjala, Ramesh; Wang, Yige
      Patent No.: 8,483,387
      Issue Date: Jul 9, 2013
    • Title: "Adaptive Cross-Polarization Modulation Cancellers for Coherent Optical Communication System"
      Inventors: Koike-Akino, Toshiaki; Parsons, Kieran; Liu, Cheng
      Patent No.: 8,472,809
      Issue Date: Jun 25, 2013
    • Title: "Method for Reducing Interference in Multi-Cell Multi-User Wireless Networks"
      Inventors: Koike-Akino, Toshiaki; Pun, Man On; Gou, Tiangao
      Patent No.: 8,472,550
      Issue Date: Jun 25, 2013
    • Title: "Sparse Channel Estimation Using Order Extension for Frequency and Time Selective MIMO Wireless Communication Networks"
      Inventors: Koike-Akino, Toshiaki
      Patent No.: 8,451,930
      Issue Date: May 28, 2013
    • Title: "Cross-Free High-Dimensional Constellations for Dual-Polarized Non-Linear Fiber-Optic Communications"
      Inventors: Koike-Akino, Toshiaki; Orlik, Philip V.; Parsons, Kieran
      Patent No.: 8,433,205
      Issue Date: Apr 30, 2013
    See All Patents for MERL