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

    •  EVENT    MERL Contributes to ICASSP 2025
      Date: Sunday, April 6, 2025 - Friday, April 11, 2025
      Location: Hyderabad, India
      MERL Contacts: Wael H. Ali; Petros T. Boufounos; Radu Corcodel; François Germain; Chiori Hori; Siddarth Jain; Devesh K. Jha; Toshiaki Koike-Akino; Jonathan Le Roux; Yanting Ma; Hassan Mansour; Yoshiki Masuyama; Joshua Rapp; Diego Romeres; Anthony Vetro; Pu (Perry) Wang; Gordon Wichern
      Research Areas: Artificial Intelligence, Communications, Computational Sensing, Electronic and Photonic Devices, Machine Learning, Robotics, Signal Processing, Speech & Audio
      Brief
      • MERL has made numerous contributions to both the organization and technical program of ICASSP 2025, which is being held in Hyderabad, India from April 6-11, 2025.

        Sponsorship

        MERL is proud to be a Silver Patron of the conference and will participate in the student job fair on Thursday, April 10. Please join this session to learn more about employment opportunities at MERL, including openings for research scientists, post-docs, and interns.

        MERL is pleased to be the sponsor of two IEEE Awards that will be presented at the conference. We congratulate Prof. Björn Erik Ottersten, the recipient of the 2025 IEEE Fourier Award for Signal Processing, and Prof. Shrikanth Narayanan, the recipient of the 2025 IEEE James L. Flanagan Speech and Audio Processing Award. Both awards will be presented in-person at ICASSP by Anthony Vetro, MERL President & CEO.

        Technical Program

        MERL is presenting 15 papers in the main conference on a wide range of topics including source separation, sound event detection, sound anomaly detection, speaker diarization, music generation, robot action generation from video, indoor airflow imaging, WiFi sensing, Doppler single-photon Lidar, optical coherence tomography, and radar imaging. Another paper on spatial audio will be presented at the Generative Data Augmentation for Real-World Signal Processing Applications (GenDA) Satellite Workshop.

        MERL Researchers Petros Boufounos and Hassan Mansour will present a Tutorial on “Computational Methods in Radar Imaging” in the afternoon of Monday, April 7.

        Petros Boufounos will also be giving an industry talk on Thursday April 10 at 12pm, on “A Physics-Informed Approach to Sensing".

        About ICASSP

        ICASSP is the flagship conference of the IEEE Signal Processing Society, and the world's largest and most comprehensive technical conference focused on the research advances and latest technological development in signal and information processing. The event has been attracting more than 4000 participants each year.
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    •  NEWS    MERL Papers and Workshops at AAAI 2025
      Date: February 25, 2025 - March 4, 2025
      Where: The Association for the Advancement of Artificial Intelligence (AAAI)
      MERL Contacts: Ankush Chakrabarty; Toshiaki Koike-Akino; Jing Liu; Kuan-Chuan Peng; Diego Romeres; Ye Wang
      Research Areas: Artificial Intelligence, Machine Learning, Optimization
      Brief
      • MERL researchers presented 2 conference papers, 2 workshop papers, and co-organized 1 workshop at the AAAI 2025 conference, which was held in Philadelphia from Feb. 25 to Mar. 4, 2025. AAAI is one of the most prestigious and competitive international conferences in artificial intelligence (AI). Details of MERL contributions are provided below.

        - AAAI Papers in Main Tracks:

        1. "Forget to Flourish: Leveraging Machine-Unlearning on Pretrained Language Models for Privacy Leakage" by M.R.U. Rashid, J. Liu, T. Koike-Akino, Y. Wang, and S. Mehnaz. [Oral Presentation]

        This work proposes a novel unlearning-based model poisoning method that amplifies privacy breaches during fine-tuning. Extensive empirical studies show the proposed method’s efficacy on both membership inference and data extraction attacks. The attack is stealthy enough to bypass detection based defenses, and differential privacy cannot effectively defend against the attacks without significantly impacting model utility.

        Paper: https://www.merl.com/publications/TR2025-017

        2. "User-Preference Meets Pareto-Optimality: Multi-Objective Bayesian Optimization with Local Gradient Search" by J.H.S. Ip, A. Chakrabarty, A. Mesbah, and D. Romeres. [Poster Presentation]

        This paper introduces a sample-efficient multi-objective Bayesian optimization method that integrates user preferences with gradient-based search to find near-Pareto optimal solutions. The proposed method achieves high utility and reduces distance to Pareto-front solutions across both synthetic and real-world problems, underscoring the importance of minimizing gradient uncertainty during gradient-based optimization. Additionally, the study introduces a novel utility function that respects Pareto dominance and effectively captures diverse user preferences.

        Paper: https://www.merl.com/publications/TR2025-018

        - AAAI Workshop Papers:

        1. "Quantum Diffusion Models for Few-Shot Learning" by R. Wang, Y. Wang, J. Liu, and T. Koike-Akino.

        This work presents the quantum diffusion model (QDM) as an approach to overcome the challenges of quantum few-shot learning (QFSL). It introduces three novel algorithms developed from complementary data-driven and algorithmic perspectives to enhance the performance of QFSL tasks. The extensive experiments demonstrate that these algorithms achieve significant performance gains over traditional baselines, underscoring the potential of QDM to advance QFSL by effectively leveraging quantum noise modeling and label guidance.

        Paper: https://www.merl.com/publications/TR2025-025

        2. "Quantum Implicit Neural Compression", by T. Fujihashi and T., Koike-Akino.

        This work introduces a quantum counterpart of implicit neural representation (quINR) which leverages the exponentially rich expressivity of quantum neural networks to improve the classical INR-based signal compression methods. Evaluations using some benchmark datasets show that the proposed quINR-based compression could improve rate-distortion performance in image compression compared with traditional codecs and classic INR-based coding methods.

        Paper: https://www.merl.com/publications/TR2025-024

        - AAAI Workshops Contributed by MERL:

        1. "Scalable and Efficient Artificial Intelligence Systems (SEAS)"

        K.-C. Peng co-organized this workshop, which offers a timely forum for experts to share their perspectives in designing and developing robust computer vision (CV), machine learning (ML), and artificial intelligence (AI) algorithms, and translating them into real-world solutions.

        Workshop link: https://seasworkshop.github.io/aaai25/index.html

        2. "Quantum Computing and Artificial Intelligence"

        T. Koike-Akino served a session chair of Quantum Neural Network in this workshop, which focuses on seeking contributions encompassing theoretical and applied advances in quantum AI, quantum computing (QC) to enhance classical AI, and classical AI to tackle various aspects of QC.

        Workshop link: https://sites.google.com/view/qcai2025/
    •  

    See All News & Events for Toshi

  • Awards

    •  AWARD    MERL Wins Awards at NeurIPS LLM Privacy Challenge
      Date: December 15, 2024
      Awarded to: Jing Liu, Ye Wang, Toshiaki Koike-Akino, Tsunato Nakai, Kento Oonishi, Takuya Higashi
      MERL Contacts: Toshiaki Koike-Akino; Jing Liu; Ye Wang
      Research Areas: Artificial Intelligence, Machine Learning, Information Security
      Brief
      • The Mitsubishi Electric Privacy Enhancing Technologies (MEL-PETs) team, consisting of a collaboration of MERL and Mitsubishi Electric researchers, won awards at the NeurIPS 2024 Large Language Model (LLM) Privacy Challenge. In the Blue Team track of the challenge, we won the 3rd Place Award, and in the Red Team track, we won the Special Award for Practical Attack.
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    •  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.
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    •  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

    • CI0080: Internship - Efficient AI

      We are on the lookout for passionate and skilled interns to join our cutting-edge research team focused on developing efficient machine learning techniques for sustainability. This is an exciting opportunity to make a real impact in the field of AI and environmental conservation, with the aim of publishing at leading AI research venues.

      What We're Looking For:

      • Advanced research experience in generative models and computationally efficient models
      • Hands-on skills for large language models (LLM), vision language models (VLM), large multi-modal models (LMM), foundation models (FoMo)
      • Deep understanding of state-of-the-art machine learning methods
      • Proficiency in Python and PyTorch
      • Familiarity with various deep learning frameworks
      • Ph.D. candidates who have completed at least half of their program

      Internship Details:

      • Duration: approximately 3 months
      • Flexible start dates available
      • Objective: publish research results at leading AI research venues

      If you are a highly motivated individual with a passion for applying AI to sustainability challenges, we want to hear from you! This internship offers a unique chance to work on meaningful projects at the intersection of machine learning and environmental sustainability.

    • CI0082: Internship - Quantum AI

      MERL is excited to announce an internship opportunity in the field of Quantum Machine Learning (QML) and Quantum AI (QAI). We are seeking a highly motivated and talented individual to join our research team. This is an exciting opportunity to make a real impact in the field of quantum computing and AI, with the aim of publishing at leading research venues.

      Responsibilities:

      • Conduct cutting-edge research in quantum machine learning.
      • Collaborate with a team of experts in quantum computing, deep learning, and signal processing.
      • Develop and implement algorithms using PyTorch and PennyLane.
      • Publish research results at leading research venues.

      Qualifications:

      • Currently pursuing a PhD or a post-graduate researcher in a relevant field.
      • Strong background and solid publication records in quantum computing, deep learning, and signal processing.
      • Proficient programming skills in PyTorch and PennyLane are highly desirable.

      What We Offer:

      • An opportunity to work on groundbreaking research in a leading research lab.
      • Collaboration with a team of experienced researchers.
      • A stimulating and supportive work environment.

      If you are passionate about quantum machine learning and meet the above qualifications, we encourage you to apply. Please submit your resume and a brief cover letter detailing your research experience and interests. Join us at MERL and contribute to the future of quantum machine learning!

    See All Internships at MERL

  • MERL Publications

    •  Attiah, K., Wang, P., Mansour, H., Koike-Akino, T., Boufounos, P.T., "Enabling DMG Wi-Fi Sensing in Data Transmission Intervals by Exploiting Beam Training Codebook", IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), April 2025.
      BibTeX TR2025-026 PDF
      • @inproceedings{Attiah2025mar,
      • author = {Attiah, Kareem and Wang, Pu and Mansour, Hassan and Koike-Akino, Toshiaki and Boufounos, Petros T.},
      • title = {{Enabling DMG Wi-Fi Sensing in Data Transmission Intervals by Exploiting Beam Training Codebook}},
      • booktitle = {IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)},
      • year = 2025,
      • month = mar,
      • url = {https://www.merl.com/publications/TR2025-026}
      • }
    •  Smedemark-Margulies, N., Wang, Y., Koike-Akino, T., Liu, J., Parsons, K., Bicer, Y., Erdogmus, D., "Improving Subject Transfer in EEG Classification with Divergence Estimation", Journal of Neural Engineering, DOI: 10.1088/​1741-2552/​ad9777, Vol. 21, No. 6, April 2025.
      BibTeX TR2025-044 PDF Software
      • @article{Smedemark-Margulies2025apr,
      • author = {Smedemark-Margulies, Niklas and Wang, Ye and Koike-Akino, Toshiaki and Liu, Jing and Parsons, Kieran and Bicer, Yunus and Erdogmus, Deniz},
      • title = {{Improving Subject Transfer in EEG Classification with Divergence Estimation}},
      • journal = {Journal of Neural Engineering},
      • year = 2025,
      • volume = 21,
      • number = 6,
      • month = apr,
      • doi = {10.1088/1741-2552/ad9777},
      • url = {https://www.merl.com/publications/TR2025-044}
      • }
    •  Koike-Akino, T., Tonin, F., Wu, Y., Wu, F.Z., Candogan, L.N., Volkan Cevher,, "Quantum-PEFT: Ultra parameter-efficient fine-tuning", arXiv, March 2025.
      BibTeX arXiv
      • @article{Koike-Akino2025mar,
      • author = {Koike-Akino, Toshiaki and Tonin, Francesco and Wu, Yongtao and Wu, Frank Zhengqing and Candogan, Leyla Naz and Volkan Cevher},
      • title = {{Quantum-PEFT: Ultra parameter-efficient fine-tuning}},
      • journal = {arXiv},
      • year = 2025,
      • month = mar,
      • url = {https://arxiv.org/abs/2503.05431}
      • }
    •  Wang, R., Wang, Y., Liu, J., Koike-Akino, T., "Quantum Diffusion Models for Few-Shot Learning", AAAI Conference on Artificial Intelligence, March 2025.
      BibTeX TR2025-025 PDF
      • @inproceedings{Wang2025mar,
      • author = {Wang, Ruhan and Wang, Ye and Liu, Jing and Koike-Akino, Toshiaki},
      • title = {{Quantum Diffusion Models for Few-Shot Learning}},
      • booktitle = {AAAI Conference on Artificial Intelligence},
      • year = 2025,
      • month = mar,
      • url = {https://www.merl.com/publications/TR2025-025}
      • }
    •  Fujihashi, T., Koike-Akino, T., "Quantum Implicit Neural Compression", AAAI Conference on Artificial Intelligence, March 2025.
      BibTeX TR2025-024 PDF
      • @inproceedings{Fujihashi2025mar,
      • author = {Fujihashi, Takuya and Koike-Akino, Toshiaki},
      • title = {{Quantum Implicit Neural Compression}},
      • booktitle = {AAAI Conference on Artificial Intelligence},
      • year = 2025,
      • month = mar,
      • url = {https://www.merl.com/publications/TR2025-024}
      • }
    See All MERL 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-1{Gbps} 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: Dec 21, 2021
    • Title: "Localization using Millimeter Wave Beam Attributes"
      Inventors: Pajovic, Milutin; Koike-Akino, Toshiaki; Wang, Pu; Orlik, Philip V.
      Patent No.: 11,122,397
      Issue Date: Sep 14, 2021
    • Title: "Symbol Detection of Massive MIMO Systems with Unknown Symbol-Dependent Transmit-Side Impairments"
      Inventors: Wang, Pu; Koike-Akino, Toshiaki; Pajovic, Milutin; Orlik, Philip V.
      Patent No.: 11,121,816
      Issue Date: Sep 14, 2021
    • Title: "Learning-Based See-Through Sensing Suitable for Factory Automation"
      Inventors: Wang, Pu; Koike-Akino, Toshiaki; Orlik, Philip V.; Bose, Arindam
      Patent No.: 11,061,388
      Issue Date: Jul 13, 2021
    • Title: "Turbo Product Polar Coding with Hard Decision Cleaning"
      Inventors: Koike-Akino, Toshiaki
      Patent No.: 10,998,922
      Issue Date: May 4, 2021
    • Title: "Optical Waveguide Interferometer"
      Inventors: Kojima, Keisuke; Wang, Bingnan; Koike-Akino, Toshiaki; Nishikawa, Satoshi; Akiyama, Koichi; Yagyu, Eiji; Shinohara, Kosuke
      Patent No.: 10,996,400
      Issue Date: May 4, 2021
    • Title: "Integrated Grating Coupler System"
      Inventors: Kojima, Keisuke; Gotoda, Mitsunobu; Koike-Akino, Toshiaki; Tahersima, Mohammad
      Patent No.: 10,962,717
      Issue Date: Mar 30, 2021
    • Title: "Grating Coupler and Integrated Grating Coupler System"
      Inventors: Kojima, Keisuke; Gotoda, Mitsunobu; Koike-Akino, Toshiaki; Tahersima, Mohammad
      Patent No.: 10,921,525
      Issue Date: Feb 16, 2021
    • Title: "Symbol Detection is Shared Wireless Channel Subject to Jamming Interference"
      Inventors: Pajovic, Milutin; Koike-Akino, Toshiaki; Orlik, Philip V.
      Patent No.: 10,917,192
      Issue Date: Feb 9, 2021
    • Title: "Irregular Polar Code Encoding"
      Inventors: Koike-Akino, Toshiaki; Wang, Ye; Draper, Stark C.
      Patent No.: 10,862,621
      Issue Date: Dec 8, 2020
    • Title: "Compact Photonic Devices"
      Inventors: Kojima, Keisuke; Tahersima, Mohammad; Koike-Akino, Toshiaki
      Patent No.: 10,859,769
      Issue Date: Dec 8, 2020
    • Title: "Optical Ring circuit with electrical filter"
      Inventors: Kojima, Keisuke; Teng, Min; Koike-Akino, Toshiaki; Lin, Chungwei; Parsons, Kieran; Gotoda, Mitsunobu; Akiyama, Koichi
      Patent No.: 10,838,282
      Issue Date: Nov 17, 2020
    • Title: "Network Adapted Control System"
      Inventors: Wang, Yebin; Ma, Yehan; Orlik, Philip V.; Koike-Akino, Toshiaki; Guo, Jianlin
      Patent No.: 10,809,701
      Issue Date: Oct 20, 2020
    • Title: "Methods and Systems for Terahertz-Based Positioning"
      Inventors: Wang, Pu; Fu, Haoyu; Orlik, Philip V.; Koike-Akino, Toshiaki; Ma, Rui; Wang, Bingnan
      Patent No.: 10,795,151
      Issue Date: Oct 6, 2020
    • Title: "System and Method for Short Block Length Distribution Matching"
      Inventors: Millar, David; Koike-Akino, Toshiaki; Parsons, Kieran; Kojima, Keisuke
      Patent No.: 10,749,554
      Issue Date: Aug 18, 2020
    • Title: "Pilot-Aided Carrier Phase Estimation for Optical Communications"
      Inventors: Millar, David; Pajovic, Milutin; Koike-Akino, Toshiaki; Kojima, Keisuke; Parsons, Kieran
      Patent No.: 10,554,309
      Issue Date: Feb 4, 2020
    • Title: "Short Block Length Distribution Matching Algorithm"
      Inventors: Millar, David; Fehenberger, Tobias; Koike-Akino, Toshiaki; Kojima, Keisuke; Parsons, Kieran
      Patent No.: 10,541,711
      Issue Date: Jan 21, 2020
    • Title: "Distribution Matcher"
      Inventors: Millar, David; Fehenberger, Tobias; Koike-Akino, Toshiaki; Parsons, Kieran; Kojima, Keisuke
      Patent No.: 10,516,503
      Issue Date: Dec 24, 2019
    • Title: "Method and System for Distributed Coding of Images"
      Inventors: Boufounos, Petros T.; Goukhshtein, Maxim; Koike-Akino, Toshiaki; Draper, Stark C.
      Patent No.: 10,455,250
      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
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