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- Distinguished Researcher
Ryo Koma
- NTT Access Network Service Systems Laboratories
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Research on high-speed optical transmission technologies using digital signal processing for future optical access
By developing high-speed optical transmission technology that meets the requirements of access networks, we aim to provide ultra-high-speed communication services to all optical access users in future Fiber-to-the-home services and All-Photonics Networks (APN) which is the basis of Innovative Optical and Wireless Networks (IOWN).
In this page
Awards
- 2023 OECC（Opto-Electronics and Communications Conference）2023 Best Industrial Paper Award
- 2018 IEICE Communication society CS Technical Committee Chairman's Award
Academic Activities
- Technical Program Committee, Optical Fiber Communication Conference (OFC), Subcommittee N4: Optical Access Networks for Fixed and Mobile Services
Publications
Papers
- R. Koma, K. Hara, J. -I. Kani and T. Yoshida, "Burst-Mode Multi-Level-CPFSK Signal Detection Using DD-LMS Based Adaptive Equalizer for High-Speed TDM-PON Upstream," in Journal of Lightwave Technology, vol. 42, no. 10, pp. 3736-3746, 15 May15, 2024, doi: 10.1109/JLT.2024.3368269.
- R. Koma, M. Fujiwara, R. Igarashi, K. Hara, J. -i. Kani and T. Yoshida, "Novel Data-Aided Carrier Frequency Offset Compensation Methods using Asymmetric-Shape Constellations for Burst-Mode Coherent Reception," in Journal of Lightwave Technology, 2022, doi: 10.1109/JLT.2022.3215193.
- R. Koma, M. Fujiwara, J. -i. Kani and T. Yoshida, "Fast Feed-Forward Optical and Electrical Gain Control to Extend the Dynamic Range of the Burst-Mode Digital Coherent Receiver for High-Speed TDM-PON Systems," in Journal of Lightwave Technology, vol. 40, no. 3, pp. 647-654, 1 Feb.1, 2022, doi: 10.1109/JLT.2021.3120805.
- R. Koma, M. Fujiwara, J. i. Kani, K. I.Suzuki, and A. Otaka, "Burst-ModeDigital Signal Processing That Pre-Calculates FIR Filter Coefficients for DigitalCoherent PON Upstream," IEEE / OSA J. Opt. Commun. Netw., vol. 10, no.5 ,pp. 461-470 ,2018.
- R. Koma, M. Fujiwara, J. i. Kani, S.Y. Kim, T. Suzuki, K. I. Suzuki, and A. Otaka, "Demonstration of Real-Time Burst-Mode Digital Coherent Reception With Wide Dynamic Range in DSP-Based PON Upstream (Invited)," IEEE/OSA J. Lightw. Technol., vol. 35, no. 8, pp. 1392-1398, 2017.
Keywords
Optical access networks, Digital signal processing technology for access networks, All-Photonics Networks