Mitsugi, Jin



Faculty of Environment and Information Studies (Shonan Fujisawa)



E-mail Address

E-mail address

Related Websites

Career 【 Display / hide

  • 1987.04

    Nippon Telegraph and Telephone Corporation

  • 2004.04

    NTT Communications

  • 2004.04


Academic Background 【 Display / hide

  • 1985

    Nagoya University, Faculty of Engineering, Aerospace Engineering

    Nagoya, University, Graduated

  • 1987

    The University of Tokyo, Graduate School, Division of Engineering, Aerospace Engineering

    Tokyo, Graduate School, Completed, Master's course

Academic Degrees 【 Display / hide

  • Dr.Eng., The University of Tokyo, Dissertation, 1996


Research Areas 【 Display / hide

  • Dynamics/Control (Machine Mechanics/Control)

  • Communication/Network engineering (Communication/Network Engineering)

Research Keywords 【 Display / hide

  • Mechatronics

  • RFID

  • Wireless communications

  • Computational Engineering

Research Themes 【 Display / hide

  • Architecture of networked RFID, 


     View Summary

    System architecture design of network RFID system.

Proposed Theme of Joint Research 【 Display / hide

  • network RFID

    Interested in joint research with industry (including private organizations, etc.),  Desired form: Cooperative Research

  • Wireless Sensor Network

    Interested in joint research with industry (including private organizations, etc.),  Desired form: Cooperative Research


Papers 【 Display / hide

  • Frequency Efficient Concurrent Data Streaming with Passive Backscatter Wireless Sensors

    Kamei H., Sato Y., Mitsugi J., Egawa K., Kawakita Y., Ichikawa H.

    2018 6th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2018 (2018 6th IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2018)     107 - 109 2019.02

    ISSN  9781538642443

     View Summary

    © 2018 IEEE. This poster presentation introduces a multi-subcarrier passive backscatter wireless communication which enables frequency efficient and perfectly synchronized sensor data streaming. The inevitable mutual interferences among sub-carriers are actively rejected with a sophisticated digital signal processing in the receiver. The performance of the method, in terms of the synchronization and the interference processing gain, are experimentally evaluated with two types of prototype sensors and a software defined receiver realized with USRP 2952R and LabVIEW communications. The results show that the proposed interference rejection method works both for analog and digital modulation.

  • High Resolution Time-of-Flight Measurement with Narrow-Band COTS Ultrasonic Transducers

    Saito M., Mitsugi J.

    Proceedings of IEEE Sensors (Proceedings of IEEE Sensors)  2018-October 2018.12

    ISSN  9781538647073

     View Summary

    © 2018 IEEE. Ultrasonic transducers (a pair of speaker and microphone) are extensively used in distance and wind speed measurements. The measurement of Time-of-Flight (TOF) between an ultrasonic speaker and a microphone dominates the accuracy. This paper presents a method to improve the TOF measurement accuracy using narrow-band commercial off-the-shelf (COTS) ultrasonic transducers. The method features the use of an experimentally captured waveform to correlate the transmitted and received signals and the use of a phase modulated ultrasonic signal. The method is experimentally evaluated to show that the proposal can significantly reduce the TOF measurement error, from 25.5% to 0.3%.

  • Perfectly synchronized streaming from digitally modulated multiple backscatter sensor tags

    Mitsugi J., Kawakita Y., Egawa K., Ichikawa H.

    RFID-TA 2018 - 2018 IEEE International Conference on RFID Technology and Applications (RFID-TA 2018 - 2018 IEEE International Conference on RFID Technology and Applications)   2018.11

    ISSN  9781538650561

     View Summary

    © 2018 IEEE. This paper proposes a multiple access method, referred to as Multiple Subcarrier Multiple Access (MSMA), for perfectly synchronized concurrent data collection from a group of passive backscatter wireless sensor tags and its experimental evaluation. By achieving less than 128 micro second synchronization error, backscatter communications can be applied to structural health monitoring of artifacts such as civil structures and machineries. In MSMA, each sensor tag uses a dedicated subcarrier frequency to produce a modulated backscatter. The sensor data is superposed onto the subcarrier either with an analog or a digital modulation. The inevitable harmonics among the subcarriers, stemming from the backscatter principle, can be rejected by numerically calculating the harmonic replicas and subtracting them from the observed signal in a software defined receiver. A frame based signal processing in the receiver results in no relative synchronization error among subcarriers even after the interference rejection. Since the interference rejection can be done before the demodulation and decoding, the concurrency can be secured irrespective to the choice of modulation method. We developed a prototype of MSMA using LabVIEW communications Software Defined Radio environment and prototype sensor tags using discrete electrical parts. The performances and limitation of MSMA using digitally modulated subcarriers are evaluated both in wired and wireless environments with up to four backscatter sensors.

  • Barcode fingerprinting: Unique identification of commercial products with their JAN/EAN/UCC barcode

    Ueno R., Mitsugi J.

    IEEE World Forum on Internet of Things, WF-IoT 2018 - Proceedings (IEEE World Forum on Internet of Things, WF-IoT 2018 - Proceedings)  2018-January   416 - 420 2018.05

    ISSN  9781467399449

     View Summary

    © 2018 IEEE. This paper proposes a method to uniquely identify commercial products with an item level barcode, specifically JAN/EAN/UCC, with which we usually cannot distinguish individual products. This research is motivated by the industrial and consumer needs for first-in-first-out operations of their inventories in the environment, where serial level barcodes, such as GS1-128 and SGTIN, or RFID are still not available. The proposal, referred to as Barcode Fingerprinting, utilizes the microscopic features of printed barcode stripes to discriminate each other. We zoom in a particular portion of a barcode image and apply SURF Algorithms and RANSAC Algorithms, to extract the microscopic features. The features are stored with the barcode ID and the time stamp for the future comparisons. We examined the feasibility of the proposal method by processing 100 barcodes of single brand PET bottles. The experiment reveals that we can uniquely identify each of the 100 barcodes by using Barcode Fingerprinting with a proper preprocessing of images.

  • Performance Evaluation of Variable Bandwidth Channel Allocation Scheme in Multiple Subcarrier Multiple Access

    Rajoria, Nitish, Kamei, Hiromu, Mitsugi, Jin, Kawakita, Yuusuke, Ichikawa, Haruhisa

    IEICE TRANSACTIONS ON COMMUNICATIONS (IEICE Transactions on Communications)  E101B ( 2 ) 564 - 572 2018.02

    Research paper (scientific journal),  ISSN  0916-8516

     View Summary

    © 2018 The Institute of Electronics, Information and Communication Engineers. Multiple Subcarrier Multiple Access (MSMA) enables concurrent sensor data streamings from multiple wireless and batteryless sensors using the principle of subcarrier backscatter used extensively in passive RFID. Since the interference cancellation performance of MSMA depends on the Signal to Interference plus Noise Ratio of each subcarrier, the choice of channel allocation scheme is essential. Since the channel allocation is a combinatorial problem, obtaining the true optimal allocation requires a vast amount of examinations which is impracticable in a system where we have tens of sensor RF tags. It is particularly true when we have variable distance and variable bandwidth sensor RF tags. This paper proposes a channel allocation scheme in the variable distance and variable bandwidth MSMA system based on a newly introduced performance index, total contamination power, to prioritize indecision cases. The performance of the proposal is evaluated with existing methods in terms of average communication capacity and system fairness using MATLAB Monte Carlo simulation to reveal its advantage. The accuracy of the simulation is also verified with the result obtained from the brute force method.

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Papers, etc., Registered in KOARA 【 Display / hide

Presentations 【 Display / hide

  • Guest Editorial

    Zhou Meng Chu, Fortino Giancarlo, Shen Weiming, Mitsugi Jin, Jobin James, Bhattacharyya Rahul

    IEEE Transactions on Automation Science and Engineering, 2016.07

  • Improvement in multiple access channel allocation for sensor node configuration based on RFID communication

    Matsuda Tomoaki, Wakisaka Yuuki, Kawakita Yuusuke, Ichiakwa Haruhisa, Mitsugi Jin

    RFID, 2016.01, IEEE

     View Summary

    <p>Wireless sensors are expected to be low cost and to reduce their power consumption so that a large number of sensors can be installed for collecting real-world information. Passive radio-frequency identification (RFID) is proposed to assign communication channels to sensors that only send analog sensing signals for their multiple access control. In this method, the RFID reader-writer assigns channels to all sensors by writing channel numbers to the RFIDs attached to the sensors. We propose a method that more efficiently assigns a multiple access channel to the controlled sensor by using passive RFID. We determine the channel by using the electronic product code (EPC) of the RF tags. This approach results in a large reduction in the number of writes. However, it is shown that there is a tradeoff between the reduction in the number of writes and the total number of channels. In addition, our method has a tradeoff between the reduction in the number of writes and the spectral efficiency.</p>

  • A feasibility study of plug-in type RF tag localization system for handheld UHF RFID reader/writers

    Miyazawa Masato, Igarashi Yuki, Mitsugi Jin

    2015.10, Oral Presentation(general)

     View Summary

    <p>This paper proposes a plug-in type RF tag localization system, using an Angle of Arrival principle, in UHF RFID, particularly targeting handheld reader/writers. Being a plug-in type, the RF tag localization system is receive-only, incurring no radio license requirement, small in size and can be built at low cost. Our fundamental idea is to employ a newly developed short-range mono-pulse method for the RF tag direction detection enabled with affordable software defined radio device and an analog front end. In this paper, we report an experimental evaluation with a functional prototype primarily on the detecting accuracy. It is shown that we can achieve about 3 degree accuracy for RF tags at 7.3 m distance from a 4 W EIRP reader/writer. Because the measurement in the direction of boresight is more stable than the other directions, the direction accuracy can be improved when we feed back the direction detection to the orientation of handheld reader/writer. We also confirm this feature experimentally.</p>

  • Boxcan

    Sato Yuki, Sato Taisuke, Mitsugi Jin

    APCC, 2015.10, Oral Presentation(general), IEICE

     View Summary

    <p>This paper introduces «Boxcan», an information retrieval platform for aggregated objects in ID-based object management system based on GS1 EPCglobal architecture framework. Boxcan platform receives an EPC of a container, then provides a tree structure of current parent-child relationship between the EPCs of the container and its inner objects. This paper proposes the system design of Boxcan platform and its applications. The proposed system design is evaluated with a field test of a practical object management system including Boxcan platform. A technical challenge to realize this function of Boxcan platform, fast retrieval of current parent-child relationship of EPCs from EPCIS, is also discussed in this paper. The effectiveness of the caching mechanism of EPC's current parent-child tree, which is a solution to this technical problem, is also evaluated by an experiment in a comparison with direct querying to EPCIS.</p>

  • Multi-code filtering &amp; collection

    Mizutani Iori, Mitsugi Jin, Endo Fumihiko, Ehara Masaki, Suzuki Hiroyuki

    IEEE RFID-TA 2015, 2015.09, Oral Presentation(general)

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Plug-in localization system using multiple commercial-off-the-shelf software defined receivers


    MEXT,JSPS, Grant-in-Aid for Scientific Research, 三次 仁, Grant-in-Aid for Scientific Research (B), Principal Investigator

  • バッテリレス・ワイヤレス完全同期ストリーム通信を実現するマルチサブキャリア多元接続方式の高信頼化と広域化


    総務省 , Strategic Information and Communications R&D Promotion Programme (SCOPE), Principal Investigator

  • 電波伝播特徴量を用いたRFID読み取り空間フィルタの実現


    MEXT,JSPS, Grant-in-Aid for Scientific Research, 三次 仁, Grant-in-Aid for Scientific Research (C), Principal Investigator

  • 電波伝搬特徴量を用いたRFID読み取り空間フィルタの実現


    JSPS, Grant-in-Aid for Scientific Research, Principal Investigator

  • センサLSIによるバッテリレス・ワイヤレス非同期ストリーム通信を実現するマルチサブキャリア多元接続方式の研究開発


    総務省, Strategic Information and Communications R&D Promotion Programme (SCOPE), Principal Investigator

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Awards 【 Display / hide

  • 功労賞

    MITSUGI JIN, 2005, 電子情報通信学会

    Type of Award: Other Awards

  • 優秀講演表彰

    MITSUGI JIN, 1995, 日本機械学会計算工学部門

    Type of Award: Other Awards

  • 第73期(1995) 優秀講演表彰

    三次 仁, 1995, Japan Society for Mechanical Engineers


Courses Taught 【 Display / hide











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Social Activities 【 Display / hide

  • 920MHz帯センター無線システムの周波数共用技術に関する調査研究会

  • 衛星通信技術の普及に関する検討会

  • 超高速衛星の技術力強化のための調査検討会

  • 920MHz電子タグ調査検討会

  • GS1 EPCglobal


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Memberships in Academic Societies 【 Display / hide

  • 電子情報通信学会, 

  • Japan Association of Mechanical Engineers, 


Committee Experiences 【 Display / hide

  • 2015

    Associate Editor, IEEE Transactions on Automation Science and Engineering

  • 2013.02

    座長, 衛星通信技術の普及に関する検討会

  • 2013

    Internet of Things, Associate Editor, IEEE

  • 2013

    RFID Virtual Journal, Associate Editor, IEEE

  • 2013

    RFID 2014, TPC track chair, IEEE

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