Title:
SPATIAL MULTIPLEX OPTICAL TRANSMISSION SYSTEM AND SPATIAL MULTIPLEX OPTICAL TRANSMISSION METHOD
Document Type and Number:
Japanese Patent JP2016134840
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a high-quality transmission system which improves convergence or stability of MIMO equalization signal processing and reduces computational complexity.SOLUTION: A spatial multiplex optical transmission system is configured to transmit an optical multicarrier signal via an optical transmission line including a plurality of spatial multiplex paths. A reception device comprises a MIMO equalization processing part 811 which compensates for a crosstalk that is generated during the transmission, for the received optical multicarrier signal for each subcarrier. A transmission device sets a baud rate of the subcarrier of the optical multicarrier signal in such a manner that a delay amount generated between the spatial multiplex paths is settled within a time window for the number of taps of the MIMO equalization processing part in the reception device, repeats a known signal that is longer than the delay amount, twice or more and periodically inserts it into a transmission signal. The MIMO quantization processing part calculates a quantization coefficient of a frequency domain in accordance with a frequency domain equalization processing scheme and converts the equalization coefficient of the frequency domain into an equalization coefficient of a time domain, and equalization coefficient of the time domain is followed by an equalization coefficient follow part 8113.SELECTED DRAWING: Figure 2
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Inventors:
LEE DOOHWAN
NAKAGAWA TADAO
HIRAGA TAKESHI
KOBAYASHI TAKAYUKI
MIYAMOTO YUTAKA
SANO AKIHIDE
MIZUNO TAKAYUKI
TAKARA HIDEHIKO
SHIBAHARA MITSUKI
NAKAGAWA TADAO
HIRAGA TAKESHI
KOBAYASHI TAKAYUKI
MIYAMOTO YUTAKA
SANO AKIHIDE
MIZUNO TAKAYUKI
TAKARA HIDEHIKO
SHIBAHARA MITSUKI
Application Number:
JP2015009593A
Publication Date:
July 25, 2016
Filing Date:
January 21, 2015
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04B10/2581; H04J99/00; H04J11/00; H04J14/00; H04J14/04; H04J14/06
Domestic Patent References:
JP2012227765A | 2012-11-15 | |||
JP5795669B1 | 2015-10-14 |
Foreign References:
WO2006077729A1 | 2006-07-27 | |||
US20090046787A1 | 2009-02-19 |
Attorney, Agent or Firm:
Shiga International Patent Office
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