Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND COMPUTER PROGRAM
Document Type and Number:
WIPO Patent Application WO/2024/013791
Kind Code:
A1
Abstract:
This signal processing device comprises: a batch adaptive equalization unit that uses a first adaptive filter to subject polarized digital signals obtained via the analog-to-digital conversion of polarized and multiplexed signals to a waveform distortion equalization process; a matrix conversion unit that acquires at least the filter coefficient of the first adaptive filter from batch adaptive equalization unit and converts the acquired filter coefficient by a matrix operation; a degree-of-freedom separation adaptive equalization unit that uses a second adaptive filter including a filter coefficient converted by the matrix conversion unit to subject the polarized digital signals to an equalization process for waveform distortion due to polarization state fluctuation in the transmission path; and a switching control unit that selects a signal subjected to the equalization process by the batch adaptive equalization unit or by the degree-of-freedom separation adaptive equalization unit as a reception signal.
Inventors:
KAWAI AKIRA (JP)
NAKAMURA MASANORI (JP)
TAKAHASHI MINAMI (JP)
KOBAYASHI TAKAYUKI (JP)
MIYAMOTO YUTAKA (JP)
NAKAMURA MASANORI (JP)
TAKAHASHI MINAMI (JP)
KOBAYASHI TAKAYUKI (JP)
MIYAMOTO YUTAKA (JP)
Application Number:
PCT/JP2022/027220
Publication Date:
January 18, 2024
Filing Date:
July 11, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/2507; H04B10/61; H04J14/06
Domestic Patent References:
| WO2020175014A1 | 2020-09-03 |
Foreign References:
| US11088766B1 |
Other References:
SATO MASAKI, ARIKAWA MANABU, NOGUCHI HIDEMI, MATSUI JUNICHIRO, ABE JUNAICHI, DE GABORY EMMANUEL LE TAILLANDIER: "Transceiver Impairment Mitigation by 8×2 Widely Linear MIMO Equalizer With Independent Complex Filtering on IQ Signals", IEEE PHOTONICS JOURNAL, IEEE, vol. 14, no. 3, 1 June 2022 (2022-06-01), pages 1 - 11, XP093128226, ISSN: 1943-0647, DOI: 10.1109/JPHOT.2022.3173652
NAKAMURA M.; KOBAYASHI T.; HAMAOKA F.; MIYAMOTO Y.: "High Information Rate of 128-GBaud 1.8-Tb/s and 64-GBaud 1.03-Tb/s Signal Generation and Detection Using Frequency-Domain 8×2 MIMO Equalization", 2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), OSA, 6 March 2022 (2022-03-06), pages 1 - 3, XP034109747
RIOS-MULLER RAFAEL; RENAUDIER JEREMIE; CHARLET GABRIEL: "Blind Receiver Skew Compensation and Estimation for Long-Haul Non-Dispersion Managed Systems Using Adaptive Equalizer", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 33, no. 7, 30 April 2015 (2015-04-30), USA, pages 1315 - 1318, XP011575164, ISSN: 0733-8724, DOI: 10.1109/JLT.2014.2377582
NAKAMURA M.; KOBAYASHI T.; HAMAOKA F.; MIYAMOTO Y.: "High Information Rate of 128-GBaud 1.8-Tb/s and 64-GBaud 1.03-Tb/s Signal Generation and Detection Using Frequency-Domain 8×2 MIMO Equalization", 2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC), OSA, 6 March 2022 (2022-03-06), pages 1 - 3, XP034109747
RIOS-MULLER RAFAEL; RENAUDIER JEREMIE; CHARLET GABRIEL: "Blind Receiver Skew Compensation and Estimation for Long-Haul Non-Dispersion Managed Systems Using Adaptive Equalizer", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 33, no. 7, 30 April 2015 (2015-04-30), USA, pages 1315 - 1318, XP011575164, ISSN: 0733-8724, DOI: 10.1109/JLT.2014.2377582
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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