Abstract
A low-complexity feed-forward carrier phase estimation (CPE) technique is presented for dual-polarization (DP)-16-QAM transmission systems. By combining QPSK partitioning, maximum likelihood (ML) detection and phase offset estimation between signals in different polarizations, simulation and experimental results for a 200Gb/s DP-16-QAM system demonstrate similar linewidth tolerance to the best feed-forward CPE reported to date while the computational complexity is at least three times lower compared with other simplified feed-forward CPE techniques.
| Original language | English |
|---|---|
| Pages (from-to) | 21717-21729 |
| Number of pages | 13 |
| Journal | Optics Express |
| Volume | 19 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 24 Oct 2011 |
Keywords
- Phase estimation
- Phase noise
- Phase recovery
- Quadrature amplitude modulation
- Real time implementation
- Signal processing
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