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Investigating the Impact of Coherent Multipath Interference on Optical QPSK Systems
Event Title
IEEE International Conference on Communications (ICC 2017)
Year (definitive publication)
2017
Language
English
Country
France
More Information
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Abstract
Coherent multipath interference (MPI) occurs in optical networks when multiple replicas of the transmitted signal propagate over different optical paths with differential delays smaller than the laser source coherence time. This paper investigates the impact of this phenomenon on coherent optical quadrature phase-shift keying (QPSK) systems and derives new analytical expressions for the moment generating function of the decision variable and for the average symbol error probability. Furthermore, the tolerance of QPSK to coherent MPI is quantified and a comparison with the incoherent MPI is also carried out, showing that the last impairment is more detrimental than the first one especially when a large number of replicas is considered.
Acknowledgements
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Keywords
multipath interference; quadrature phase-shift keying (QPSK); moment generating function; error probability; optical networks
Fields of Science and Technology Classification
- Physical Sciences - Natural Sciences
Funding Records
| Funding Reference | Funding Entity |
|---|---|
| UID/EEA/50008/2013 | Fundação para a Ciência e Tecnologia (FCT) |
