Abstract
An improved eighth-order statistics (EOS) blind phase recovery method is proposed for high-order coherent modulation formats. The method uses a multistage feed-forward carrier phase recovery algorithm by combining an EOS blind phase estimate with a maximum-likelihood carrier phase estimate. Experimental results show that the proposed new algorithm can reduce the required computational effort by more than a factor of 3 for a 16-QAM system.
| Original language | English |
|---|---|
| Article number | 141121 |
| Journal | Optical Engineering |
| Volume | 53 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sept 2014 |
| Externally published | Yes |
Keywords
- Carrier phase estimation
- Coherent receiver
- Eighth-order statistics
- Feed-forward
- Quadrature amplitude modulation