Single wavelength source-free OFDMA-PON communication systems and methods
US8233797B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2009 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Mar 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0216
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and systems for processing communication signals in an Orthogonal Frequency Division Multiple Access (OFDMA)-Passive Optical Network (PON) are disclosed. An optical carrier at a wavelength generated at an optical line terminal (OLT) may be reused by optical network units (ONUs) in the network for upstream transmission of data signals to the OLT. In addition, each ONU may perform carrier suppression to avoid broadband beating noise resulting from the simultaneous transmission of upstream data signals on the same wavelength. Further, the optical source at the OLT used to generate the optical carrier may be reused as a local oscillator for coherent detection of received upstream signals to minimize any frequency offsets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.