Title:
COMMUNICATION SYSTEM, RECEIVER, DISTORTION DETECTION DEVICE, METHOD, AND COMPUTER READABLE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2022/091452
Kind Code:
A1
Abstract:
The present disclosure makes it possible to accurately detect distortion in a transmitter and distortion in a receiver without increasing cost. A coherent receiving circuit (21) performs coherent reception of a signal transmitted via a transmission path. A filter group (22) includes a first WL filter (23), a filter layer (24), and a second WL filter (25), which are cascade- connected. A coefficient updating means (26) uses an error inverse propagation method to adaptively control the filter coefficients of the first WL filter (23) and the second WL filter (25) on the basis of the difference between an output signal outputted from the filter group (22) and the prescribed value therefor. A first distortion detection means (27) detects the distortion in the receiver on the basis of the filter coefficient of the first WL filter (23). A second distortion detection means (28) detects the distortion in the transmitter on the basis of the filter coefficient of the second WL filter (25).
Inventors:
ARIKAWA MANABU (JP)
Application Number:
PCT/JP2021/016026
Publication Date:
May 05, 2022
Filing Date:
April 20, 2021
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04J14/06; H04B10/2507; H04B10/61
Foreign References:
| JP2020141294A | 2020-09-03 | |||
| JP2019047261A | 2019-03-22 | |||
| JP2019041285A | 2019-03-14 | |||
| US9692521B1 | 2017-06-27 |
Other References:
CHRIS R. S. FLUDGER , THEO KUPFER: "Transmitter Impairment Mitigation and Monitoring for High Baud-Rate, High Order Modulation Systems", ECOC 2016; 42ND EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION, 22 September 2016 (2016-09-22), pages 256 - 258, XP055735231
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
DA SILVA, EDSON PORTO ET AL.: "Widely Linear Equalization for IQ Imbalance and Skew Compensation in Optical Coherent Receivers", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 34, 7 June 2016 (2016-06-07), pages 3577 - 3586, XP011618649, DOI: 10.1109/JLT.2016.2577716
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
DA SILVA, EDSON PORTO ET AL.: "Widely Linear Equalization for IQ Imbalance and Skew Compensation in Optical Coherent Receivers", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 34, 7 June 2016 (2016-06-07), pages 3577 - 3586, XP011618649, DOI: 10.1109/JLT.2016.2577716
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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