2022
conference-paper
OpenAlex
Junya Nishioka, Takatoshi Akamatsu, Tsuyoshi Yoshida, Yoshiaki Konishi et autres
For beyond-5G mobile fronthaul, the performance of a demultiplexer with 28 Gsps digital-down-conversion is evaluated. The demultiplexer can cleanly separate intermediate frequency channels that have offsets <8.25 GHz and satisfies the 3GPP requirements.
jp
(code pays fourni par la source)
2021
article
OpenAlex
Shun Chikamori, Masashi Binkai, Yoshida Tsuyoshi, Kiyoshi Onohara et autres
2020
article
OpenAlex
Kiyoshi Onohara, Junya Nishioka, Tsuyoshi Yoshida, Naoki Suzuki
2020
conference-paper
OpenAlex
Shun Chikamori, Masashi Binkai, Tsuyoshi Yoshida, Keisuke Matsuda et autres
We studied experimentally the performance of 400 Gb/s signals subjected to SOP variation with optical filtering applied. Single-carrier 16-QAM is found to tolerate twice more rapid SOP variation than dual-carrier 8-QAM in bandwidth of 75 GHz.
jp
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Kiyoshi Onohara, Junya Nishioka, Tsuyoshi Yoshida, Naoki Suzuki
We propose and experimentally demonstrate the improvement of the dynamic range of analog-to-digital conversion using multi-channel analog-to-digital converters for beyond-5G mobile fronthaul. More than 10dB improvement is achieved using 28GS/s and 8-bit two-channel analog-to-digital converters.
jp
(code pays fourni par la source)
2019
article
OpenAlex
Luiz Anet Neto, Jochen Maes, Per Larsson-Edefors, Junichi Nakagawa et autres
In this invited article, we address the impacts of the rise of signal processing for increased capacity per wavelength and better receiver sensitivities in next generation optical access networks. We start by recalling the main channel limitations of currently deployed intensity modulated, …
fr, be, se, jp, us
(code pays fourni par la source)
2018
conference-paper
OpenAlex
Keisuke Matsuda, Ryosuke Matsumoto, Hiroshi Miura, Kiyoshi Onohara et autres
We review hardware-efficient DSP technologies, especially about AEQ and CPR suitable for PON systems. DGD tolerance evaluation in a numerical simulation of a 100 Gb/s/λ-based coherent WDM-PON system with hardware-efficient DSP is presented.
us
(code pays fourni par la source)
2015
article
OpenAlex
Koji Miyanohana, Hirano Susumu, Hideo Yoshida, Yoshikuni Miyata et autres
2015
article
OpenAlex
Yuki Yoshida, Akihiro Maruta, Kenji Ishii, Kiyoshi Onohara et autres
In this study, we demonstrate coherent OFDMA-PON uplink transmission experimentally using three optical network units including a 3-Gbaud real-time transmitter prototype. Cooperative digital signal processing at the ONUs and an optical line terminal enable no-guard-band subcarrier-based multiple access with free-running up to …
jp, de
(code pays fourni par la source)
2015
conference-paper
OpenAlex
Kenji Ishii, Yuki Yoshida, Kiyoshi Onohara, Masaki Noda et autres
We demonstrated multiple-FDMA co-coexisted PON uplink transmission using the real-time ONU transmitter prototype. Flexible bandwidth assignment to multiplexed 3-ONU and the distance-adaptive capability is successfully indicated.
jp
(code pays fourni par la source)
2014
article
OpenAlex
Kiyoshi Onohara, Kenji Ishii, Yuji Akiyama, Masaki Noda et autres
We demonstrate a power-efficient coherent interleaved frequency domain multiple access passive optical network (IFDMA-PON) uplink system. The digital signal processing circuits for coherent IFDMA-based quadrature phase-shift keying (PSK) are implemented on 40-nm field programmable gate arrays. By employing polar-coordinate transformed mapping of …
de, jp
(code pays fourni par la source)
2014
article
OpenAlex
Kenji Ishii, Yuki Yoshida, Kiyoshi Onohara, Masaki Noda et autres