Abstract
This paper investigates the performance of a flexible decision-aided maximum likelihood (DA-ML) phase estimator in coherent optical phase-shift-keying (PSK) system recently proposed by us. We take into account the time-varying phase noise, instead of the assumption of constant phase noise over the observation interval in conventional DA-ML phase estimator. The weighted coefficients are introduced to recover carrier phase more accurately than conventional DA-ML scheme. The phase error variance of our proposed scheme is derived and the effect of different block length is also analysed. Simulation results show that there is a bit error rate (BER) floor at different block length and this can eliminate the block length effect of the conventional DA-ML scheme.
| Original language | English |
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| Title of host publication | ICOCN 2015 - 14th International Conference on Optical Communications and Networks, Proceedings |
| Publisher | IEEE |
| ISBN (Electronic) | 9781467373739 |
| DOIs | |
| Publication status | Published - 14 Aug 2015 |
| Externally published | Yes |
| Event | 14th International Conference on Optical Communications and Networks, ICOCN 2015 - Nanjing, China Duration: 3 Jul 2015 → 5 Jul 2015 |
Conference
| Conference | 14th International Conference on Optical Communications and Networks, ICOCN 2015 |
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| Country/Territory | China |
| City | Nanjing |
| Period | 3/07/15 → 5/07/15 |
Keywords
- carrier phase estimation
- decision-aided
- maximum likelihood
- weighted coefficients
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Computer Networks and Communications