Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28287
Title: Modulation-format-independent carrier phase estimation for square M-QAM systems
Authors: Gao, Y
Lau, APT
Lu, C 
Keywords: Carrier phase recovery
coherent communication
optical communication
phase noise
quadrature amplitude modulation
Issue Date: 2013
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Source: IEEE photonics technology letters, 2013, v. 25, no. 11, 6508837, p. 1073-1076 How to cite?
Journal: IEEE Photonics Technology Letters 
Abstract: A modulation-format-independent or universal carrier phase estimation (U-CPE) technique is proposed for square 4-, 16-, and 64-ary quadrature amplitude modulation transmission systems for future elastic optical networks. The proposed U-CPE is based on a feedback architecture and eliminates the need to know the signal modulation format (MF) by using a cost function in the phase estimation update that is common to all square-shaped constellations. Compared with standard decision directed phase lock loop (S-DD-PLL) that requires the knowledge of the MF, the U-CPE method maintains close OSNR performance and linewidth tolerance. When MF is agnostic, the proposed U-CPE outperforms a modulation format oblivious (MFO)-DD-PLL in which QPSK decision rules are always used irrespective of actual MF of the signal.
URI: http://hdl.handle.net/10397/28287
ISSN: 1041-1135
DOI: 10.1109/LPT.2013.2259226
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