Variable spectral efficiency optical modulation schemes
US9698939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2013 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Nov 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3405
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of transmitting a data signal using an optical transmitter of an optical communications system. A first encoder processes an N-bit input vector in accordance with a first mapping to generate a corresponding M-bit data stream. A Forward Error Correction encoder processes the M-bit data stream in accordance with a predetermined FEC encoding scheme to generate an encoded signal. A constellation mapper maps the encoded signal to symbol values in accordance with a predetermined modulation scheme to generate a corresponding symbol stream. A modulator modulates a carrier light in accordance with the encoded symbol stream to generate an optical signal for transmission through the optical communications system. The first mapping can be adjusted to maximize performance of the optical communications system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.