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Patent Searching and Data


Title:
WAVEFORM EQUALIZER, WAVEFORM EQUALIZATION METHOD, AND WAVEFORM EQUALIZATION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/113200
Kind Code:
A1
Abstract:
A waveform equalizer (10) of this invention includes a delay tap (11) configured to perform delay processing for an input signal, a first-order sub-filter (12) configured to perform linear processing for the signal output from the delay tap (11), a second-order sub-filter (13) configured to perform first nonlinear processing based on a second-order Volterra series for the signal output from the delay tap (11), a third-order sub-filter (14) configured to perform second nonlinear processing based on a third-order term of a nonlinear polynomial for the signal output from the delay tap (11), and an adding unit (15) configured to add the signal output from the first-order sub-filter (12), the signal output from the second-order sub-filter (13), and the signal output from the third-order sub-filter (14). Hence, the waveform equalizer of this invention can provide simplified nonlinear equalization processing for improving signal quality.

Inventors:
DIAMANTOPOULOS NIKOLAOS-PANTELEIMON (JP)
MATSUO SHINJI (JP)
Application Number:
PCT/JP2020/043803
Publication Date:
June 02, 2022
Filing Date:
November 25, 2020
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B3/04
Foreign References:
JP2006135993A2006-05-25
Other References:
TSIMBINOS J., LEVER K.V.: "Applications of higher-order statistics to modelling, identification and cancellation of nonlinear distortion in high-speed samplers and analogue-to-digital converters using the Volterra and Wiener models", HIGHER-ORDER STATISTICS, 1993., IEEE SIGNAL PROCESSING WORKSHOP ON SOUTH LAKE TAHOE, CA, USA 7-9 JUNE 1993, NEW YORK, 7 June 1993 (1993-06-07) - 9 June 1993 (1993-06-09), US , pages 379 - 383, XP010068690, ISBN: 978-0-7803-1238-8, DOI: 10.1109/HOST.1993.264531
TSIMBINOSTJS JOHN, LEVER KENNETH V: "The Computational Complexity of Nonlinear Compensators Based on the Volterra Inverse", PROCEEDINGS OF 8TH WORKSHOP ON STATISTICAL SIGNAL AND ARRAY PROCESSING, 24 June 1996 (1996-06-24), pages 387 - 390, XP055934163
KIM J.Y., CHO K.Y., KIM Y.N., CHUNG J.H., NAM S.W.: "Design of a Volterra series-based nonlinear compensator", HIGHER-ORDER STATISTICS, 1997., PROCEEDINGS OF THE IEEE SIGNAL PROCESS ING WORKSHOP ON BANFF, ALTA., CANADA 21-23 JULY 1997, 21 July 1997 (1997-07-21) - 23 July 1997 (1997-07-23), US , pages 127 - 131, XP010239830, ISBN: 978-0-8186-8005-2, DOI: 10.1109/HOST.1997.613501
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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