High Power Efficiency Intensity Modulation for Simultaneous Wireless Information and Power Transfer in Underwater Visible Light Communications

• Project/Area Number: 17K18143
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering; Naval and maritime engineering
• Research Institution: Ibaraki University
• Principal Investigator: Kozawa Yusuke 茨城大学, 理工学研究科(工学野), 助教 (20634215)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 可視光ワイヤレス給電通信 / 可視光通信 / 海中可視光通信 / 海中通信 / 可視光ワイヤレス給電 / 水中通信 / 水中可視光通信 / 海中可視光ワイヤレス給電 / ワイヤレス給電 / 海中無線通信 / 水中無線通信 / 海中高速無線ネットワーク / LED

Outline of Final Research Achievements

This research project aims to develop an underwater wireless power transfer communication system that simultaneously realizes wireless communication and wireless power transfer between an unmanned submarine or underwater drone and underwater sensors in order to construct a flexible underwater high-speed wireless communication network. In particular, we propose an adaptive color shift keying (CSK) method using multiple colors to realize stable wireless power transfer while adapting to underwater conditions. The proposed adaptive CSK method has been theoretically analyzed to evaluate its communication performance and power supply performance according to undersea water quality.

Academic Significance and Societal Importance of the Research Achievements

水中空間で用いるあらゆるセンサのバッテリレス化およびワイヤレス化により、水中センサの海底配置及び水中センサからの情報収集が容易となり、より複数の水中センサをより広範囲に設置することが可能となる。これらの水中センサを用いた大規模水中無線通信ネットワーク網は、日本海域のメタンハイドレート等の国際資源の探索/発掘作業を効率的に進めることができ、環境イノベーションおよび国際競争力への寄与が期待できる。

Research Products

• [Journal Article] Theoretical analysis of received optical intensity of underwater image sensor based visible light communications using RGB-LEDs (2021)
  • Author(s): Yokoo Kazune、Kozawa Yusuke、Sawa Takao
  • Journal Title: Proceedings of 2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC) Volume: 1 Pages: 1-6
  • DOI: 10.1109/wpmc52694.2021.9700471
  • Peer Reviewed
• [Journal Article] Theoretical analysis of selective variable rate multi-pulse pulse position modulation for visible light communications (2021)
  • Author(s): Iwase Tatsuhiko、Kozawa Yusuke、Habuchi Hiromasa
  • Journal Title: Proceedings of 2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC) Volume: 1 Pages: 1-6
  • DOI: 10.1109/wpmc52694.2021.9700459
  • Peer Reviewed
• [Journal Article] Chlorophyll concentration-based CSK constellation point design for underwater SLIPT with priority on communication performance (2021)
  • Author(s): Kogo Takuma、Kozawa Yusuke、Habuchi Hiromasa
  • Journal Title: Proceedings of 2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC) Volume: 1 Pages: 1-6
  • DOI: 10.1109/wpmc52694.2021.9700409
  • Peer Reviewed
• [Journal Article] Chlorophyll concentration-based CSK constellation point optimization for Underwater SLIPT using Time Splitting receiver (2020)
  • Author(s): Kogo Takuma、Kozawa Yusuke、Habuchi Hiromasa
  • Journal Title: Proceedings of IEEE Global Communications Conference Workshop on Optical Wireless Communications 2020 Volume: 1 Pages: 1-6
  • DOI: 10.1109/gcwkshps50303.2020.9367436
  • Peer Reviewed
• [Journal Article] Optimized CSK constellations for underwater SLIPT (2020)
  • Author(s): Takuma Kogo, Yusuke Kozawa, Hiromasa Habuchi
  • Journal Title: Proceedings of RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing 2020 (NCSP2020) Volume: 1 Pages: 409-412
  • Peer Reviewed
• [Journal Article] Inverse Pulse Position Modulation Scheme for Underwater Visible Light Simultaneous Wireless Information and Power Transfer (2019)
  • Author(s): Yusuke Kozawa, Ryota Kimoto, Yohtaro Umeda
  • Journal Title: Proceedings of The 1st Optical wireless and Fiber Power Transmission Conference (OWPT2019) in Optics and Photonics International Congress Volume: 1 Pages: 1-2
  • Peer Reviewed
• [Journal Article] Experimental Evaluation of Hybrid PWM/DPAM Dimming Control Method for Digital Color Shift Keying Using RGB-LED Array (2018)
  • Author(s): Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda
  • Journal Title: Journal of Signal Processing Volume: 22 Issue: 4 Pages: 165-168
  • DOI: 10.2299/jsp.22.165
  • NAID: 130007419607
  • ISSN: 1342-6230, 1880-1013
  • Year and Date: 2018-07-25
  • Peer Reviewed / Open Access
• [Journal Article] Underwater Visible Light Simultaneous Wireless Information and Power Transfer using Inverse Pulse Position Modulation Scheme (2018)
  • Author(s): Ryota Kimoto, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
  • Journal Title: Proceedings of RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing 2019 (NCSP2019) Volume: 1 Pages: 108-111
  • Peer Reviewed
• [Journal Article] Hybrid PWM/DPAM Dimming Control for Digital Color Shift Keying Using RGB-LED Array (2018)
  • Author(s): Jumpei Okumura, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
  • Journal Title: IEEE Journal on Selected Areas in Communications Volume: 35 Issue: 1 Pages: 45-52
  • DOI: 10.1109/jsac.2017.2774738
  • Peer Reviewed
• [Journal Article] Inverse pulse position modulation schemes for simultaneous visible light wireless information and power transfer (2017)
  • Author(s): Ryota Kimoto, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
  • Journal Title: Proceeding of 27th International Telecommunication Networks and Applications Conference (ITNAC) Volume: 1 Pages: 1-6
  • DOI: 10.1109/atnac.2017.8215383
  • Peer Reviewed
• [Presentation] 時間分割型USLIPTにおける最適CSK信号点空間拡張に関する検討 (2022)
  • Author(s): 向後拓磨・小澤佑介・羽渕裕真
  • Organizer: 電子情報通信学会ワイドバンドシステム研究会
• [Presentation] 水中可視光通信のための角度ダイバーシティ受信機を用いた背景光雑音軽減法に関する検討 (2022)
  • Author(s): 松永彗吾・小澤佑介・羽渕裕真
  • Organizer: 電子情報通信学会ワイドバンドシステム研究会
• [Presentation] 時間分割型水中可視光ワイヤレス給電通信システムのためのCSK信号点配置の検討 (2020)
  • Author(s): 向後拓磨・小澤佑介・羽渕裕真
  • Organizer: 電子情報通信学会ワイドバンドシステム研究会
• [Presentation] 可視光ワイヤレス給電通信システムにおける通信と給電効率の最適化 (2020)
  • Author(s): 中村陽平、李贇、楳田洋太郎、小澤佑介
  • Organizer: 電子情報通信学会
• [Presentation] LEDを使った可視光通信とはなにか (2019)
  • Author(s): 小澤佑介
  • Organizer: 応用科学学会公開技術講演会
  • Invited
• [Presentation] 太陽電池等価回路パラメータ光強度依存性評価 (2019)
  • Author(s): 小田嶋啓介、楳田洋太郎、小澤佑介、村松大陸
  • Organizer: 電子情報通信学会総合大会
• [Presentation] 反転パルス位置変調方式を用いた水中可視光ワイヤレス給電通信システムに関する基礎検討 (2018)
  • Author(s): 木元亮太、小澤佑介、楳田洋太郎、羽渕裕真
  • Organizer: 電子情報通信学会ワイドバンドシステム研究会
• [Presentation] 光強度変復調法を用いた水中可視光ワイヤレス給電通信システムに関する基礎検討 (2018)
  • Author(s): 木元亮太、小澤佑介、楳田洋太郎、羽渕裕真
  • Organizer: 革新的無線通信技術に関する横断型研究会 MIKA
• [Presentation] 可視光を用いた水中光無線給電通信方式に関する研究 (2018)
  • Author(s): 小澤佑介
  • Organizer: 第三回「IoT 時代におけるスマートスペクトラムとその応用」研究会
• [Presentation] Experimental Evaluation of Hybrid PWM/DPAM Dimming Control Method for Digital Color Shift Keying using RGB-LED Array (2018)
  • Author(s): Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda
  • Organizer: RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing 2018 (NCSP2018)
  • Int'l Joint Research
• [Presentation] PWM/DPAMハイブリッド型調光制御法を用いたデジタル制御型カラーシフトキーイングの実験的評価 (2017)
  • Author(s): 松田勇介、小澤佑介、楳田洋太郎
  • Organizer: 電子情報通信学会ワイドバンドシステム研究会
• [Presentation] 水中可視光ワイヤレス給電通信システムのための交流/直流分離フィルタ設計に関する基礎的検討 (2017)
  • Author(s): 木元亮太、小澤佑介、楳田洋太郎、羽渕裕真
  • Organizer: 電子情報通信学会ワイドバンドシステム研究会
• [Presentation] マルチカラー可視光通信技術 (2017)
  • Author(s): 小澤佑介
  • Organizer: 可視光通信協会拡大ワークショップ
  • Invited
• [Book] 月刊 電気計算 2020年5月号 [特集]無線通信技術の動向「水中可視光通信の現状と展望」 (2020)
  • Author(s): 小澤佑介
  • Total Pages: 7
  • Publisher: 電気書院
• [Remarks] 革新的無線通信技術に関する横断型研究会 MIKAにて若手最優秀部門のポスター賞受賞
  • URL: http://mika-wc.org/award/mika2018prize/
• [Remarks] 電子情報通信学会ワイドバンドシステム研究会12月研究会ポスターセッションにて学生奨励賞受賞
  • URL: https://www.ieice.org/~wbs/award.html