K
Koichi Ishihara
Researcher at Nippon Telegraph and Telephone
Publications - 131
Citations - 1916
Koichi Ishihara is an academic researcher from Nippon Telegraph and Telephone. The author has contributed to research in topics: Transmission (telecommunications) & Signal. The author has an hindex of 22, co-authored 131 publications receiving 1858 citations. Previous affiliations of Koichi Ishihara include Harvard University.
Papers
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Journal ArticleDOI
Coherent Optical Single Carrier Transmission Using Overlap Frequency Domain Equalization for Long-Haul Optical Systems
Riichi Kudo,Takayuki Kobayashi,Koichi Ishihara,Yasushi Takatori,Akihide Sano,Yutaka Miyamoto +5 more
TL;DR: In this paper, the authors proposed coherent optical single carrier transmission (COSC) using overlap frequency domain equalization (OFDE) for the chromatic dispersion (CD) compensation.
Journal ArticleDOI
No-Guard-Interval Coherent Optical OFDM for 100-Gb/s Long-Haul WDM Transmission
Akihide Sano,Eiichi Yamada,Hiroji Masuda,E. Yamazaki,Takayuki Kobayashi,E. Yoshida,Yutaka Miyamoto,Riichi Kudo,Koichi Ishihara,Yasushi Takatori +9 more
TL;DR: In this paper, coherent optical orthogonal frequency division multiplexing (CO-OFDM) techniques for the long-haul transmission of 100-Gb/s-class channels are described.
Proceedings ArticleDOI
102.3-Tb/s (224 × 548-Gb/s) C- and extended L-band all-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone
Akihide Sano,Takayuki Kobayashi,Shogo Yamanaka,Akihiko Matsuura,Hiroto Kawakami,Yutaka Miyamoto,Koichi Ishihara,H. Masuda +7 more
TL;DR: In this paper, the authors demonstrate 1023 Tb/s transmission over 3×80 km of PSCF by employing 548-Gb/s PDM-64QAM single-carrier frequency division multiplexing (SC-FDM) signals with pilot tone and 112-THz ultra-wideband low-noise amplification in the C- and extended L-bands.
Proceedings Article
240-Gb/s polarization-multiplexed 64-QAM modulation and blind detection using PLC-LN hybrid integrated modulator and digital coherent receiver
Akihide Sano,Takayuki Kobayashi,Koichi Ishihara,Hiroji Masuda,Shuto Yamamoto,Kunihiko Mori,Etsushi Yamazaki,E. Yoshida,Yutaka Miyamoto,Takashi Yamada,Hiroshi Yamazaki +10 more
TL;DR: In this paper, the authors demonstrate 240-Gb/s 64-QAM signal modulation and detection using hybrid integration of silica PLCs and LiNbO 3 phase modulators.
Patent
Optical ofdm receiver, optical transmission system, subcarrier separation circuit, and subcarrier separation method
TL;DR: In this paper, a high-performance optical OFDM receiver is realized, where a subcarrier separation circuit receives an OFDM signal consisting of two subcarriers A and B and separates a sub-carrier component.