| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for automatic adaptive optimization of an average length used for a phase recovery apparatus. <P>SOLUTION: 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. <P>COPYRIGHT: (C)2010,JPO&INPIT |
