Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/053706
Kind Code:
A1
Abstract:
This signal processing device comprises: a coefficient updating unit that approximates a characteristic relating to a light signal propagation path with a first tap coefficient vector having an L0 norm not greater than a prescribed value; a zeroing unit that generates a second tap coefficient vector by substituting a zero for a tap coefficient having an absolute value less than a threshold value, from among the tap coefficients of the first tap coefficient vector; and an adaptive filter that performs, on the basis of the second tap coefficient vector, adaptive equalization processing on a digital signal corresponding to the light signal received via the propagation path.
Inventors:
HORIKOSHI KENGO (JP)
NAKAMURA MASANORI (JP)
OKAMOTO SEIJI (JP)
NISHIZAWA HIDEKI (JP)
YAMAZAKI ETSUSHI (JP)
NAKAMURA MASANORI (JP)
OKAMOTO SEIJI (JP)
NISHIZAWA HIDEKI (JP)
YAMAZAKI ETSUSHI (JP)
Application Number:
PCT/JP2019/036277
Publication Date:
March 25, 2021
Filing Date:
September 17, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B10/61; H04B10/2569
Domestic Patent References:
| WO2018079598A1 | 2018-05-03 |
Foreign References:
| JP2010057016A | 2010-03-11 | |||
| JP2018182620A | 2018-11-15 | |||
| JP2014233039A | 2014-12-11 | |||
| JP2018174413A | 2018-11-08 |
Other References:
GU Y. ET AL.: "10 Norm Constraint LMS Algorithm for Sparse System Identification", SIGNAL PROCESSING LETTERS, vol. 16, no. 9, September 2009 (2009-09-01), pages 774 - 777, XP011262068
PELEKANAKIS K. ET AL.: "New sparse adaptive algorithms based on the natural gradient and the LO-norm", JOURNAL OF OCEANIC ENGINEERING, vol. 38, no. 2, April 2013 (2013-04-01), pages 323 - 332, XP011499974, DOI: 10.1109/JOE.2012.2221811
YUANTAO GUJIAN JINSHUNLIANG MEI: "lo Norm Constraint LMS Algorithm for Sparse System Identification", IEEE SIGNAL PROCESSING LETTERS, vol. 16, no. 9, 2009, pages 774 - 777, XP011262068
See also references of EP 3996297A4
PELEKANAKIS K. ET AL.: "New sparse adaptive algorithms based on the natural gradient and the LO-norm", JOURNAL OF OCEANIC ENGINEERING, vol. 38, no. 2, April 2013 (2013-04-01), pages 323 - 332, XP011499974, DOI: 10.1109/JOE.2012.2221811
YUANTAO GUJIAN JINSHUNLIANG MEI: "lo Norm Constraint LMS Algorithm for Sparse System Identification", IEEE SIGNAL PROCESSING LETTERS, vol. 16, no. 9, 2009, pages 774 - 777, XP011262068
See also references of EP 3996297A4
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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