Phase-Offset Estimation for Joint-Polarization Phase-Recovery in DP-16-QAM Systems

Phase-Offset Estimation for Joint-Polarization Phase-Recovery in DP-16-QAM Systems

We propose a method that estimates the phase-offset between polarization-demultiplexed 16-ary quadrature amplitude modulation (16-QAM) signals, enabling the utilization of joint-polarization phase-recovery (JPPR) algorithms. The method is based on a Viterbi & Viterbi-like architecture that raise...

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Veröffentlicht in:IEEE photonics technology letters 2010-10, Vol.22 (20), p.1515-1517
Hauptverfasser: Müller, R R, De Arruda Mello, D A
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Computer simulation
Conferences
Feedforward
Fiber optics
Laser noise
Lasers
Local oscillators
Monte Carlo methods
Optical fibers
Optical modulation
Optical noise
Optical polarization
optical receivers
Optical transmitters
Phase detection
Phase estimation
Phase noise
Quadrature amplitude modulation
Signal generators
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Beschreibung
Zusammenfassung:We propose a method that estimates the phase-offset between polarization-demultiplexed 16-ary quadrature amplitude modulation (16-QAM) signals, enabling the utilization of joint-polarization phase-recovery (JPPR) algorithms. The method is based on a Viterbi & Viterbi-like architecture that raises selected samples to the fourth power to remove the data dependence from the phase estimation process. Monte Carlo simulations indicate that feedforward and decision-directed JPPR algorithms using the proposed phase-offset estimation technique effectively relax the laser linewidth requirements for dual-polarization 16-QAM systems.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2010.2066264