Apparatus and methods for digital signal constellation transformation
US9853734B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2016 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Apr 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/252
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for digital signal constellation transformation are provided herein. In certain configurations, an integrated circuit includes an analog front-end that converts an analog signal vector representing an optical signal into a digital signal vector, and a digital signal processing circuit that processes the digital signal vector to recover data from the optical signal. The digital signal processing circuit generates signal data representing a signal constellation of the digital signal vector. The digital signal processing circuit includes an adaptive gain equalizer that compensates the signal data for distortion of the signal constellation arising from biasing errors of optical modulators used to transmit the optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.