Methods and systems for polarization multiplexed multilevel modulation for optical communication
US8175466B2 · kind B2 · utility
9Cited by
1References
20Claims
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Key dates
| Filing date | Aug 4, 2009 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Nov 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03375
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Multilevel soft-equalizer detectors, such as a maximum a posteriori probability (MAP) detector, suitable for use in polarization multiplexed optical communications using multilevel modulations and coherent detection are disclosed. Detection systems and methods may consider two symbols transmitted over two orthogonal polarization states as a two-component symbol, which is effective in eliminating the bit error ratio (BER) floor phenomenon introduced by conventional soft equalizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.