Title:
MULTICARRIER SIGNAL WAVEFORM EQUALIZATION CIRCUIT AND MULTICARRIER SIGNAL WAVEFORM EQUALIZATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/248285
Kind Code:
A1
Abstract:
According to the present invention, a multicarrier signal waveform equalization circuit comprises: an acquisition unit that acquires an electrical signal obtained by converting, by means of coherent detection, an optical signal which is converted into a digital modulation signal via phase modulation or quadrature amplitude modulation, split into multiple carrier waves, superimposed on a local oscillation laser, and transmitted from a transmission unit; and a crosstalk compensation unit that compensates for crosstalk between a plurality of signals superimposed on each of the plurality of carrier waves obtained from the acquired electric signal.
Inventors:
MINOGUCHI KYO (JP)
YAMAZAKI ETSUSHI (JP)
NAKAMURA MASANORI (JP)
HORIKOSHI KENGO (JP)
OKAMOTO SEIJI (JP)
YAMAZAKI ETSUSHI (JP)
NAKAMURA MASANORI (JP)
HORIKOSHI KENGO (JP)
OKAMOTO SEIJI (JP)
Application Number:
PCT/JP2022/024505
Publication Date:
December 28, 2023
Filing Date:
June 20, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/2507; H04B10/61
Other References:
KIKUCHI KAZURO: "Fundamentals of Coherent Optical Fiber Communications", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 34, no. 1, 1 January 2016 (2016-01-01), USA, pages 157 - 179, XP011598922, ISSN: 0733-8724, DOI: 10.1109/JLT.2015.2463719
ZHANG BOYANG; GAI WEIXIN; NIU HAOWEI; YE BINGYI; SHENG KAI; ZUO TIANJIAN; LIU LEI: "Analog Signal Processing Circuits for a 400Gb/s 16QAM Optical Coherent Receiver", 2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), IEEE, 22 May 2021 (2021-05-22), pages 1 - 5, XP033932163, ISSN: 2158-1525, ISBN: 978-1-7281-3320-1, DOI: 10.1109/ISCAS51556.2021.9401734
KAZUHIKO OZEKI; TETSUO UMEDA: "An adaptive filtering algorithm using an orthogonal projection to an affine subspace and its properties", TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS AND COMMUNICATION ENGINEERS OF JAPAN A, IEICE, JP, vol. J67-A, no. 2, 25 February 1984 (1984-02-25), JP, pages 126 - 132, XP009551316
GAY S.L., TAVATHIA S.: "The fast affine projection algorithm", 1995 INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING; 9-12 MAY ,1995 ; DETROIT, MI, USA, IEEE, NEW YORK, NY, USA, vol. 5, 9 May 1995 (1995-05-09) - 12 May 1995 (1995-05-12), New York, NY, USA , pages 3023 - 3026, XP010151981, ISBN: 978-0-7803-2431-2, DOI: 10.1109/ICASSP.1995.479482
ZHANG BOYANG; GAI WEIXIN; NIU HAOWEI; YE BINGYI; SHENG KAI; ZUO TIANJIAN; LIU LEI: "Analog Signal Processing Circuits for a 400Gb/s 16QAM Optical Coherent Receiver", 2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), IEEE, 22 May 2021 (2021-05-22), pages 1 - 5, XP033932163, ISSN: 2158-1525, ISBN: 978-1-7281-3320-1, DOI: 10.1109/ISCAS51556.2021.9401734
KAZUHIKO OZEKI; TETSUO UMEDA: "An adaptive filtering algorithm using an orthogonal projection to an affine subspace and its properties", TRANSACTIONS OF THE INSTITUTE OF ELECTRONICS AND COMMUNICATION ENGINEERS OF JAPAN A, IEICE, JP, vol. J67-A, no. 2, 25 February 1984 (1984-02-25), JP, pages 126 - 132, XP009551316
GAY S.L., TAVATHIA S.: "The fast affine projection algorithm", 1995 INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING; 9-12 MAY ,1995 ; DETROIT, MI, USA, IEEE, NEW YORK, NY, USA, vol. 5, 9 May 1995 (1995-05-09) - 12 May 1995 (1995-05-12), New York, NY, USA , pages 3023 - 3026, XP010151981, ISBN: 978-0-7803-2431-2, DOI: 10.1109/ICASSP.1995.479482
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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