Superimposed training and digital filtering coherent optical receivers
US8538278B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Sep 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6162
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a polarization-multiplexing optical communications system, a method and system for coherent reception of polarization-multiplexed optical communications. Training and data sequences are recovered from a plurality of orthogonally polarized signals, such that training and data sequences may be used on a single channel without loss of spectral efficiency. This is accomplished by estimating a channel response for each orthogonally polarized signal based on the mean of the signal and distinguishing between a data sequence and a training sequence in each orthogonally polarized signal. Such distinguishing is accomplished according to an iterative linear minimum mean-square equalization based on the respective channel response estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.