Variable spectral efficiency optical modulation schemes
US10735135B2 · kind B2 · utility
1Cited by
5References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 8, 2019 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Oct 8, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3405
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmitter of a communications system includes a first encoder configured to apply a shaping operation to a data signal to generate a shaped data signal, a second encoder configured to encode the shaped data signal according to a forward error correction (FEC) scheme to generate an encoded signal, and a constellation mapper configured to modulate the encoded signal to symbol values according to a modulation scheme to generate a corresponding symbol stream for transmission through the communications system. The shaping operation reduces average constellation energy for constellations of the modulation scheme.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.