Direct-detected orthogonal frequency-division multiplexing with dispersion pre-compensation digital signal processing
US9641374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2015 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Feb 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/368
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Chromatic dispersion is pre-compensated in a direct-detected orthogonal frequency-division multiplexed optical transmitter through digital signal processing methods, to generate signals that can be transmitted over an optical fiber. The dispersion pre-compensation digital signal processing may include multiplying subcarriers by a respective factor. The dispersion pre-compensation digital signal processing may instead include application of a finite impulse response filter to signals. The dispersion pre-compensation digital signal processing may instead include fast Fourier transformations of signals, application of a frequency domain filter to signals generated by the fast Fourier transformations, and inverse fast Fourier transformations of the signals produced by application of the frequency domain filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.