Title:
SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD
Document Type and Number:
WIPO Patent Application WO/2013/051244
Kind Code:
A1
Abstract:
A signal processing means, comprising: a carrier compensation means that generates two carrier compensation signals for two polarization signals, by compensating for phase difference and frequency difference between signal light and local light; a symbol determination means that demodulates the two carrier compensation signals according to a signal arrangement for multi-level modulation; a symbol rough determination means that demodulates the two carrier compensation signals according to a signal arrangement having a reduced number of levels for multi-level modulation; a selection means that selects either the output from the symbol determination means or the output from the symbol rough determination means; and a coefficient setting means that refreshes a filter coefficient for a polarization-separation means, using the output selected by the selection means.
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Inventors:
YASUDA WAKAKO (JP)
OGASAHARA DAISAKU (JP)
FUJISAWA SHINSUKE (JP)
OGASAHARA DAISAKU (JP)
FUJISAWA SHINSUKE (JP)
Application Number:
PCT/JP2012/006323
Publication Date:
April 11, 2013
Filing Date:
October 03, 2012
Export Citation:
Assignee:
NEC CORP (JP)
YASUDA WAKAKO (JP)
OGASAHARA DAISAKU (JP)
FUJISAWA SHINSUKE (JP)
YASUDA WAKAKO (JP)
OGASAHARA DAISAKU (JP)
FUJISAWA SHINSUKE (JP)
International Classes:
H04L27/38
Foreign References:
| US20110150503A1 | 2011-06-23 | |||
| JP2009296596A | 2009-12-17 | |||
| US20110052215A1 | 2011-03-03 | |||
| JP2004153837A | 2004-05-27 | |||
| JP2000083071A | 2000-03-21 | |||
| JP2003179659A | 2003-06-27 |
Other References:
S.J.SAVORY ET AL.: "Transmission of 42.8Gbit/s Polarization Multiplexed NRZ-QPSK over 6400km of Standard Fiber with no Optical Dispersion Compensation", OFC/NFOEC 2007, OTUAL IEEE, 29 March 2007 (2007-03-29), pages 1 - 3, XP031146716
TIMO PFAU ET AL.: "Hardware-Efficient Coherent Digital Receiver Concept With Feedforward Carrier Recovery for M-QAM Constellations", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 27, no. 8, 15 April 2009 (2009-04-15), pages 989 - 999, XP011255446
TIMO PFAU ET AL.: "Hardware-Efficient Coherent Digital Receiver Concept With Feedforward Carrier Recovery for M-QAM Constellations", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 27, no. 8, 15 April 2009 (2009-04-15), pages 989 - 999, XP011255446
Attorney, Agent or Firm:
HAYAMI, SHINJI (JP)
Shinji Hayami (JP)
Shinji Hayami (JP)
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Claims: