Title:
CHARACTERISTIC MEASURING DEVICE, CHARACTERISTIC MEASURING METHOD, AND COMPUTER PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/135869
Kind Code:
A1
Abstract:
This characteristic measuring device that measures lane-to-lane characteristics between a transmitter and a receiver connected through an optical fiber transmission path, the characteristic measuring device comprising: an adaptive equalizer unit that performs an equalization process on an input signal, the input signal being a polarization multiplexed received signal, a phase conjugate signal of the polarization multiplexed received signal, or a plurality of signals mathematically equivalent to the received signal and the phase conjugate signal of the received signal; and a characteristic function derivation unit that calculates a first inverse characteristic representing an inverse characteristic of a transmitter and a second inverse characteristic representing an inverse characteristic of a receiver on the basis of a filter coefficient obtained during the equalization processing performed by the adaptive equalizer unit, and a frequency offset.
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Inventors:
KAWAI AKIRA (JP)
NAKAMURA MASANORI (JP)
KOBAYASHI TAKAYUKI (JP)
MIYAMOTO YUTAKA (JP)
NAKAMURA MASANORI (JP)
KOBAYASHI TAKAYUKI (JP)
MIYAMOTO YUTAKA (JP)
Application Number:
PCT/JP2022/036151
Publication Date:
July 20, 2023
Filing Date:
September 28, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/07; H04B10/61
Foreign References:
| US11088766B1 | ||||
| JP2019186912A | 2019-10-24 | |||
| JP2020141294A | 2020-09-03 |
Other References:
LIANG JUNPENG; FAN YANGYANG; TAO ZHENNING; NAKASHIMA HISAO; HOSHIDA TAKESHI: "Transceiver In-phase and Quadrature Imbalance Monitoring by Two Stage MIMO Equalizers", 2018 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE (ACP), IEEE, 26 October 2018 (2018-10-26), pages 1 - 4, XP033487178, DOI: 10.1109/ACP.2018.8596202
KAWAI AKIRA; NAKAMURA MASANORI; KOBAYASHI TAKAYUKI; MIYAMOTO YUTAKA: "4-Dimensional IQ Characteristic Estimation for Polarization-multiplexed Coherent Transceivers", 2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), OSA, 6 March 2022 (2022-03-06), pages 1 - 3, XP034110093
KAWAI AKIRA; NAKAMURA MASANORI; KOBAYASHI TAKAYUKI; MIYAMOTO YUTAKA: "4-Dimensional IQ Characteristic Estimation for Polarization-multiplexed Coherent Transceivers", 2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), OSA, 6 March 2022 (2022-03-06), pages 1 - 3, XP034110093
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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