Title:
DIGITAL FILTER DEVICE, DIGITAL FILTERING METHOD, AND CONTROL PROGRAM FOR DIGITAL FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/029613
Kind Code:
A1
Abstract:
In order to solve the problem of realizing high precision compensation of distortion, a digital filter device is provided with: a first distortion compensation filter unit for compensating for a first waveform distortion included in an input signal, by carrying out digital signal processing; a first filter coefficient setting unit for setting a filter coefficient for the first distortion compensation filter unit; a second distortion compensation filter unit for compensating for a second waveform distortion included in a signal output from the first distortion compensation filter unit; and a second filter coefficient setting unit for setting a filter coefficient for the second distortion compensation filter unit on the basis of the filter coefficient set by the first filter coefficient setting unit.
Inventors:
ABE JUNICHI (JP)
NOGUCHI HIDEMI (JP)
NOGUCHI HIDEMI (JP)
Application Number:
PCT/JP2011/069103
Publication Date:
March 08, 2012
Filing Date:
August 18, 2011
Export Citation:
Assignee:
NEC CORP (JP)
ABE JUNICHI (JP)
NOGUCHI HIDEMI (JP)
ABE JUNICHI (JP)
NOGUCHI HIDEMI (JP)
International Classes:
H04B3/04; H03H17/02; H04L27/00
Foreign References:
| JPH04362808A | 1992-12-15 | |||
| JPH02235442A | 1990-09-18 | |||
| JPS62104211A | 1987-05-14 | |||
| JPS57183139A | 1982-11-11 | |||
| JP2002526981A | 2002-08-20 | |||
| JP2008205654A | 2008-09-04 |
Other References:
SEB J. SAVORY: "Digital filters for coherent optical receivers", OPTICS EXPRESS, vol. 16, no. 2, January 2008 (2008-01-01), pages 804 - 817, XP007906766, DOI: doi:10.1364/OE.16.000804
TANIMURA ET AL.: "A Simple Digital Skew Compensator for Coherent Receiver", PROCEEDINGS OF EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION (ECOC, 2009
See also references of EP 2613452A4
TANIMURA ET AL.: "A Simple Digital Skew Compensator for Coherent Receiver", PROCEEDINGS OF EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION (ECOC, 2009
See also references of EP 2613452A4
Attorney, Agent or Firm:
SHIMOSAKA, NAOKI (JP)
Naoki Shimosaka (JP)
Naoki Shimosaka (JP)
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Claims:
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