Quadrature amplitude modulation (QAM) vector signal generation by external modulator
US9906305B2 · kind B2 · utility
1Cited by
1References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2016 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Mar 10, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical signal transmitter produces optical signals comprising QAM modulated vector signals generated using a single external electro-optical modulator operated in conjunction with a wavelength selective switch. The transmission processing achieves adaptive photonic frequency multiplication and comprises QAM modulated signals with high order constellations such as 8-QAM, 16-QAM, and 64-QAM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.