Ryo Koma

Publication Activity (10 Years)

Years Active: 2014-2023
Publications (10 Years): 11

Top Topics

Filter Coefficients

Reconstruction Error

Signal Processing

Top Venues

Publications

Yuma Kawamoto, Toki Yoshioka, Norihiko Shibata, Daniel Headland, Masayuki Fujita, Ryo Koma, Ryo Igarashi, Kazutaka Hara, Jun-ichi Kani, Tadao Nagatsuma
300-GHz-Band Diplexer for Frequency-Division Multiplexed Wireless Communication. IEICE Trans. Electron. 106 (11) (2023)
Ryo Igarashi, Keita Toichi, Tsubasa Saijo, Ryo Koma, Kazutaka Hara, Jun-ichi Kani, Tomoaki Yoshida, Tadao Nagatsuma
First Demonstration of 128-Gbit/s 300-GHz-band THz Transmission Using OFC-based Transmitter and Intradyne Receiver. OECC/PSC (2022)
Ryo Koma, Kazutaka Hara, Takuya Kanai, Junichi Kani, Tomoaki Yoshida
Novel EA-DFB Mode-Switching Transmitter Supporting Continuous Phase Frequency Shift Keying and Intensity Modulation for All-Photonics Network. ECOC (2021)
Ryo Igarashi, Ryo Koma, Kazutaka Hara, Kazuaki Honda, Junichi Kani, Tomoaki Yoshida
Simultaneous Reception of ASK-based AMCC Signals and QPSK Signals with Single Coherent Receiver. OFC (2021)
Takuya Kanai, Masamichi Fujiwara, Ryo Koma, Ryo Igarashi, Noriko Iiyama, Junichi Kani, Akihiro Otaka
Wide-Range Frequency Offset Compensation for CPFSK Used as TOM-Based Digital Coherent PON's Upstream Signals. ECOC (2018)
Ryo Koma, Masamichi Fujiwara, Ryo Igarashi, Takuya Kanai, Junichi Kani, Akihiro Otaka
Wide Range Carrier Frequency Offset Estimation Method using Training Symbols with Asymmetric Constellations for Burst-Mode Coherent Reception. OFC (2018)
Ryo Koma, Masamichi Fujiwara, Jun-ichi Kani, Ken-Ichi Suzuki, Akihiro Otaka
Burst-Mode Digital Signal Processing That Pre-Calculates FIR Filter Coefficients for Digital Coherent PON Upstream. JOCN 10 (5) (2018)
Masamichi Fujiwara, Ryo Koma, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka
Performance evaluation of CPFSK transmitters for TDM-based digital coherent PON upstream. OFC (2017)
Masamichi Fujiwara, Ryo Koma
Increasing Splitting Ratio of Extended-Reach WDM/TDM-PON by Using Central Office Sited Automatic Gain Controlled SOAs. IEICE Trans. Commun. (8) (2017)
Ryo Koma, Masamichi Fujiwara, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka
High Sensitivity and Wide Dynamic Range Burst-Mode Coherent Receiver that Controls Gains of a SOA and TIAs for Long-Reach and High-Splitting-Ratio PON. ECOC (2017)
Ryo Koma, Masamichi Fujiwara, Junichi Kani, Ken-Ichi Suzuki, Akihiro Otaka
Wide dynamic range burst-mode digital coherent detection using fast ALC-EDFA and pre-calculation of FIR filter coefficients. OFC (2016)
Masamichi Fujiwara, Ryo Koma, Ken-Ichi Suzuki, Akihiro Otaka
Compact bi-directional EDFAs to support extended power budget class of TWDM-PON. ECOC (2015)
Masamichi Fujiwara, Ryo Koma, Katsuhisa Taguchi
High-splitting-ratio WDM/TDM-PONs using automatic gain controlled SOAs designed for central office use. OFC (2015)
Ryo Koma, Masamichi Fujiwara, Shunji Kimura, Naoto Yoshimoto, Hideaki Kimura
Wide dynamic range burst-mode reception of symmetrically clipped DCO-OFDM using optical domain power equalizer. ECOC (2014)