发明名称 |
OPTICAL RECEIVER AND FREQUENCY OFFSET CORRECTION METHOD |
摘要 |
An optical receiver includes: a frontend circuit configured to generate a baseband signal representing a received optical signal by using local oscillator light; a frequency offset estimator configured to estimate a frequency offset of the baseband signal; a frequency offset corrector configured to correct the frequency offset of the baseband signal according to an estimation result by the frequency offset estimator; a phase recovery configured to recover a modulated phase from the baseband signal for which the frequency offset is corrected; a data recovery configured to recover transmission data according to the modulated phase recovered by the phase recovery; and a controller configured to control an operation of the frequency offset estimator according to a phase error of the baseband signal for which the frequency offset is corrected. |
申请公布号 |
US2014286650(A1) |
申请公布日期 |
2014.09.25 |
申请号 |
US201414186647 |
申请日期 |
2014.02.21 |
申请人 |
FUJITSU LIMITED |
发明人 |
Ogiwara Hiroshi |
分类号 |
H04B10/61 |
主分类号 |
H04B10/61 |
代理机构 |
|
代理人 |
|
主权项 |
1. An optical receiver comprising:
a frontend circuit configured to generate a baseband signal representing a received optical signal by using local oscillator light; a frequency offset estimator configured to estimate a frequency offset of the baseband signal; a frequency offset corrector configured to correct the frequency offset of the baseband signal according to an estimation result by the frequency offset estimator; a phase recovery configured to recover a modulated phase from the baseband signal for which the frequency offset is corrected; a data recovery configured to recover transmission data according to the modulated phase recovered by the phase recovery; and a controller configured to control an operation of the frequency offset estimator according to a phase error of the baseband signal for which the frequency offset is corrected. |
地址 |
Kawasaki-shi JP |