Title:
DIGITAL SIGNAL PROCESSING DEVICE AND COHERENT DIGITAL SIGNAL PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/224296
Kind Code:
A1
Abstract:
This digital signal processing device comprises: a waveform shaping filter unit that executes a digital filtering process for a reception symbol generated by performing an equalization process on a reception signal and that outputs the execution result; a candidate symbol generation unit that generates a candidate symbol assumed as a transmission symbol before modulation of the reception signal; a transmission line simulation filter unit that executes a digital filtering process for the candidate symbol and a determination symbol determined to be a transmission symbol in the past and outputs the execution result; a symbol likelihood calculation unit that calculates, on the basis of the output from the waveform shaping filter unit and the output from the transmission line simulation filter unit, the likelihood of a symbol value represented by the reception symbol; and a symbol determination unit that determines the transmission symbol on the basis of the likelihood of the symbol value calculated by the symbol likelihood calculation unit.
Inventors:
YAMAMOTO SHUTO (JP)
TANIGUCHI HIROKI (JP)
NAKAMURA MASANORI (JP)
KISAKA YOSHIAKI (JP)
TANIGUCHI HIROKI (JP)
NAKAMURA MASANORI (JP)
KISAKA YOSHIAKI (JP)
Application Number:
PCT/JP2021/015841
Publication Date:
October 27, 2022
Filing Date:
April 19, 2021
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H03M13/39; H04B3/06; H04L27/01
Foreign References:
| US6493409B1 | 2002-12-10 | |||
| JP2006140910A | 2006-06-01 | |||
| JP2020077934A | 2020-05-21 |
Other References:
TANIGUCHI, HIROKI ET AL.: "0-band 255-Gbps PAM-8 transmission demonstration applied with maximum likelihood sequence estimation in nonlinear", LECTURE PROCEEDINGS 2 OF THE 2019 COMMUNICATION SOCIETY CONFERENCE OF IEICE, 27 August 2019 (2019-08-27), pages 126
MASUDA AKIRA; TANIGUCHI HIROKI; YAMAMOTO SHUTO; OGISO YOSHIHIRO; FUKUTOKU MITSUNORI: "96-Gbaud PAM-4 Transmission with 1 sample/symbol under 22-GHz Bandwidth Limitation Using NL-MLSE Based on Third-Order Volterra Filter", 2018 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC), IEEE, 23 September 2018 (2018-09-23), pages 1 - 3, XP033447790, DOI: 10.1109/ECOC.2018.8535509
MASUDA AKIRA; TANIGUCHI HIROKI; YAMAMOTO SHUTO; OGISO YOSHIHIRO; FUKUTOKU MITSUNORI: "96-Gbaud PAM-4 Transmission with 1 sample/symbol under 22-GHz Bandwidth Limitation Using NL-MLSE Based on Third-Order Volterra Filter", 2018 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC), IEEE, 23 September 2018 (2018-09-23), pages 1 - 3, XP033447790, DOI: 10.1109/ECOC.2018.8535509
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
Download PDF:
Previous Patent: LIQUID EJECTION DEVICE, PROGRAM, AND LIQUID EJECTION HEAD
Next Patent: CALCULATION DEVICE, CALCULATION METHOD, AND PROGRAM
Next Patent: CALCULATION DEVICE, CALCULATION METHOD, AND PROGRAM