An Improved Feed-Forward Carrier Recovery Algorithm for Coherent Receivers With M -QAM Modulation Format

• Published in: IEEE photonics technology letters Vol. 22; no. 14; pp. 1051 - 1053
• Main Author: Zhou, Xiang
• Format: Journal Article
• Language: English
• Published: IEEE 15.07.2010
• Subjects: Carriers; Coherence; Coherent receiver; Conferences; feed-forward; Feedforward systems; Fiber optics; High speed optical techniques; Laser feedback; Laser noise; Maximum likelihood estimation; Modulation; modulation format; optical; Optical fibers; Optical receivers; Phase estimation; Phase modulation; phase recovery; Quadrature amplitude modulation; quadrature amplitude modulation (QAM); Receivers; Recovery; Testing

An improved feed-forward carrier phase recovery method is proposed for coherent receivers using M-ary quadrature amplitude modulation-based modulation formats. It is shown that by introducing multiple cascaded feed-forward carrier recovery stages, the required compute power can be significantly redu...