Title:
METHOD AND APPARATUS FOR ADAPTIVE OPTIMIZATION OF AVERAGE LENGTH IN PHASE RECOVERY
Document Type and Number:
Japanese Patent JP2010016827
Kind Code:
A
Abstract:
To provide a method and apparatus for automatic adaptive optimization of an average length used for a phase recovery apparatus.
A current phase of a digital symbol obtained by phase recovery and a data modulation phase of the digital symbol obtained by data recovery are received. A residual phase difference of the digital symbol, which is a difference between the current phase and the data modulation phase of the digital symbol, is calculated. An auto-correlation value of the residual phase difference with displacement m, wherein m is an integer, is calculated. The average length of a phase recovery device is subjected to the adaptive optimization based on the auto-correlation value of the residual phase difference.
Inventors:
LI LEI
TAO ZHENNING
NAKAJIMA HISAO
TAO ZHENNING
NAKAJIMA HISAO
Application Number:
JP2009157365A
Publication Date:
January 21, 2010
Filing Date:
July 01, 2009
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H04L27/22; H04L27/38
Domestic Patent References:
| JP2001060980A | 2001-03-06 | |||
| JP2000069096A | 2000-03-03 | |||
| JPH11154827A | 1999-06-08 | |||
| JPH098856A | 1997-01-10 | |||
| JPH10190497A | 1998-07-21 | |||
| JPH10200590A | 1998-07-31 | |||
| JPH07297870A | 1995-11-10 |
Attorney, Agent or Firm:
Yoshiyuki Osuga
virtue Tamio Ei
virtue Tamio Ei