Digital coherent receiver and receiving method
Granted 14 Jan 2014 · 4 office actions
Current assignee: 1FINITY INC. · originally Fujitsu Limited
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Inventors: Takeshi Hoshida, Kosuke Komaki, Hisao Nakashima · Examiner: Ken Vanderpuye · AU 2636 · TC 2600
Life of the patent
11 dated eventsAbstract
A digital coherent receiver includes a front end, an A/D convertor, and a processor. The front end converts a light signal into an electric signal by using a signal light and a local oscillator light. The A/D convertor converts the electric signal of the front end into a digital signal. The processor calculates a spectrum gravity center of the digital signal converted by the A/D convertor, estimates a frequency offset of the digital signal based on the calculated spectrum gravity center, and reduces the frequency offset of the digital signal based on the estimated frequency offset.
Claims
10 · 2 independent · depth 3Classifications
4 codes- H04B10/06
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1 priority documents›Priority documents — 1
| Type | Document | Date |
|---|---|---|
| related publication | US 20110255877 A1 | 20 Oct 2011 |
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