Estimation and compensation of local oscillator frequency offset and chromatic dispersion using pilot tones in spectral-shaping subcarrier modulation
US9647767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2015 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Aug 20, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0091
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal processing method including obtaining, using an optical receiver, a data signal that comprises one or more pairs of pilot tones and a plurality of subcarrier signals, identifying the one or more pairs of pilot tones, determining a local oscillator frequency offset estimation for the data signal using the one or more pairs of pilot tones, wherein the local oscillator frequency offset estimation indicates a frequency offset, and compensating the data signal in accordance with the local oscillator frequency offset estimation. A signal processing method including obtaining, using an optical receiver, a data signal that comprises one or more pairs of pilot tones and a plurality of subcarrier signals, identifying the one or more pairs of pilot tones, determining a chromatic dispersion estimation for the data signal using the one or more pairs of pilot tones, and compensating the data signal in accordance with the chromatic dispersion estimation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.