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 |
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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