研究者詳細 - 山里　敬也

論文 - 山里　敬也

分割表示 1,501 件中 21 - 40 件目／全件表示 >>

Comparison of distance performances of modulation schemes in intelligent transport system image sensor communication 査読有り

Takuya Yamamoto, Takaya Yamazato, Hiraku Okada, Masayuki Kinoshita, Koji Kamakura, Shintaro Arai, Tomohiro Yendo, Toshiaki Fujii

IEICE COMMUNICATIONS EXPRESS 10 巻 ( 8 ) 頁： 498 - 504 2021年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG

This study describes intelligent transport image sensor communication (ITS-ISC) systems that use LED arrays as transmitters that imitate traffic lights. Three signal-transmission schemes -luminance modulation, spatial modulation, and combined luminance and spatial modulation- use LED array. However, their suitability for ITS-ISC has not been explored yet. Therefore, we compare the communication performance of these three systems under strong saturation and present the results.

DOI： 10.1587/comex.2021ETL0032

Web of Science

CiNii Research

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Deep Learning Detection for superimposed control signal in LEO-MIMO 査読有り

Okema R.

2020 IEEE Global Communications Conference, GLOBECOM 2020 - Proceedings 2020-January 巻 2020年12月

Performance Evaluation of Range Estimation for Image Sensor Communication Using Phase-only Correlation 査読有り

Ruiyi Huang, Masayuki Kinoshita, Takaya Yamazato, Hiraku Okada, Koji Kamakura, Shintaro Arai, Tomohiro Yendo, Toshiaki Fujii

2020 IEEE Globecom Workshops, GC Wkshps 2020 - Proceedings 2020年12月

掲載種別：研究論文（国際会議プロシーディングス）

Stereo cameras, serving as the 'eyes' of automotive vehicles, can determine the distance between objects and the vehicles. In this paper, stereo cameras are introduced into image-sensor-based visible light communication (IS-VLC) systems, in which the combination of VLC and stereo ranging shows promising prospects for intelligent transport systems. However, one of the problems of IS-VLC stereo ranging is that the luminance level of LEDs in the captured images would greatly affect disparity estimation, which would result in inaccurate range estimation. This paper gives the performance evaluation of this problem using phase-only correlation algorithm with luminance selection. The proposed scheme using stereo cameras exhibited a ranging accuracy of 60± 0.15m in static conditions.

DOI： 10.1109/GCWkshps50303.2020.9367540

Scopus

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Estimation for direction of signal arrival based on area density of estimated lines for ultrasonic sensor array 査読有り

Morita E.

2020 IEEE 9th Global Conference on Consumer Electronics, GCCE 2020 頁： 333 - 335 2020年10月

Sequential maximum likelihood decoding incorporating reliability determination for image sensor communication 査読有り

Tang Zhengqiang, Arai Shintaro, Yendo Tomohiro, He Di, Yamazato Takaya

IEICE Communications Express 9 巻 ( 8 ) 頁： 365 - 370 2020年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電子情報通信学会

<p>In this study, the sequential maximum likelihood decoding (S-MLD) for image sensor based visible light communication, referred to as image sensor communication, is proposed. The conventional system cannot correctly decode degraded captured images. To overcome this problem, S-MLD partitions the LED area on the image into two segments and sequentially creates pseudo-captured images, which imitate all possible LED blinking patterns. This approach is based on MLD for each segment. Moreover, reliability determination is incorporated to improve communication quality. We performed computer simulations and confirmed that S-MLD exhibits superior decoding performance and approximately 90% computational cost reduction compared to the previous MLD.</p>

DOI： 10.1587/comex.2020XBL0058

Web of Science

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Nonlinear Transform for Parallel Transmission for Image-Sensor-based Visible Light Communication 査読有り

Takahashi K.

IEEE International Conference on Communications 2020-June 巻 2020年6月

Visible Light Communications for Automotive Intelligence 査読有り

Yamazato T.

2020 Optical Fiber Communications Conference and Exhibition, OFC 2020 - Proceedings 2020年3月

BER Measurement for Transmission Pattern Design of ITS Image Sensor Communication Using DMD Projector 査読有り

Arisue T.

2020 IEEE 17th Annual Consumer Communications and Networking Conference, CCNC 2020 2020年1月

Nonlinear Transform for Parallel Transmission for Image-Sensor-based Visible Light Communication 査読有り

Takahashi Kotomi, Kamakura Koji, Kinoshita Masayuki, Yamazato Takaya

ICC 2020 - 2020 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2020年

Visible light communications for automotive intelligence 査読有り

Yamazato T.

Optics InfoBase Conference Papers Part F174-OFC 2020 巻 2020年

Stereo ranging method using led transmitter for visible light communication 査読有り

Kinoshita M.

2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings 2019年12月

Analysis of Data Collected by the 700 MHz Band Intelligent Transport Systems for Reducing Ambulance Transportation Time 査読有り

Takuya Mitani, Takaya Yamazato, Katsuhiro Naito, Yuki Mori

IEEE International Conference on Connected Vehicles and Expo:ICCVE 2019 2019年11月

Analysis of Data Collected by the 700 MHz Band Intelligent Transport Systems for Reducing Ambulance Transportation Time 査読有り

Mitani T., Yamazato T., Naito K., Mori Y.

2019 8th IEEE International Conference on Connected Vehicles and Expo, ICCVE 2019 - Proceedings 2019年11月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：2019 8th IEEE International Conference on Connected Vehicles and Expo, ICCVE 2019 - Proceedings

Emergency services around the world face the problem of increasing patient transportation times. The operation of emergency vehicles is fundamentally different from that of general vehicles; hence, algorithms recommending optimal routes in a conventional way are not always applicable to emergency vehicles. In this study, we analyzed data of inter-vehicle and road-vehicle communication collected at 700 MHz band intelligent transport systems and demonstrated that the overall travel time of emergency vehicles can be reduced by decreasing their travel time at intersections.

DOI： 10.1109/ICCVE45908.2019.8965232

Scopus

Direct wireless link to out-of-range node with assistance of surrounding nodes 査読有り

Hiroya Tanaka, Shintaro Hiraoka, Shintaro Arai, Takaya Yamazato, Yukihiro Tadokoro

IEEE Transactions on Vehicular Technology 68 巻 ( 11 ) 頁： 10703 - 10712 2019年11月