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

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1 Author(s)
Xiang Zhou ; AT&T Labs.-Res., Middletown, NJ, USA

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 reduced compared to the prior art using the single-stage-based blind phase search method.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 14 )