Correlation-control QPSK transmitter
US8483574B2 · kind B2 · utility
2Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2010 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Aug 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03178
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An optical transmitter utilizing a multi-level data modulator to produce a PDM-QPSK signal, a one-bit delay interferometer configured to correlate the multi-level data modulated signal and an optical filter configured to combine the correlated multi-level data modulated signal with one or more neighboring signals prior to transmitting over one of a plurality of optical channels. The PDM-QPSK correlated signal is configured to reduce the signal spectrum thereby increasing spectral efficiency of the transmitted signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.