Frequency Offset Compensation and Carrier Phase Recovery for Differentially Encoded 16-QAM Vector Signal in a 60-GHz RoF System

A.-L. Yi; L.-S. Yan; C. Liu; M. Zhu; J. Wang; L. Zhang; C.-H. Ye; G.-K. Chang

doi:10.1109/JPHOT.2013.2273735

IEEE Photonics Journal (Jan 2013)

Frequency Offset Compensation and Carrier Phase Recovery for Differentially Encoded 16-QAM Vector Signal in a 60-GHz RoF System

A.-L. Yi,
L.-S. Yan,
C. Liu,
M. Zhu,
J. Wang,
L. Zhang,
C.-H. Ye,
G.-K. Chang

Affiliations

A.-L. Yi: <formula formulatype="inline"><tex Notation="TeX">$^{1}$</tex></formula>Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
L.-S. Yan: Center for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
C. Liu: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
M. Zhu: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
J. Wang: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
L. Zhang: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
C.-H. Ye: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA , USA
G.-K. Chang: School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA

DOI: https://doi.org/10.1109/JPHOT.2013.2273735
Journal volume & issue: Vol. 5, no. 4
pp. 7200807 – 7200807

Abstract

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Differentially encoding and frequency offset compensating for a 16-quadrature amplitude modulation (16-QAM) vector signal in 60-GHz millimeter-wave radio-over-fiber (RoF) systems are experimentally investigated. The fourfold phase ambiguity issue in a non-data-aided signal communication transmission system with conventional square 16-QAM constellations is successfully tackled based on the differentially encoding scheme. Experimental results show that frequency offset compensation and carrier phase recovery are simultaneously achieved by utilizing the decision-directed carrier phase recovery algorithm. Up to $\sim\! \pm 1.3 \times 10^{-3}$ frequency offset times symbol rate product $\Delta f \cdot T_{s}$ is well compensated at the given bit-error-ratio (BER) value of $\sim\!\!10^{-3}$.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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