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Optical Engineering • Open Access

Peak-to-average power ratio mitigation and adaptive bit assignment in single-carrier frequency division multiplexing access via hierarchical modulation
Author(s): Lijia Zhang; Bo Liu; Xiangjun Xin; Yongjun Wang

Paper Abstract

A hierarchical modulation with multilevels is proposed for an optical single-carrier frequency division multiplexing access (SC-FDMA) system. It can mitigate the nonlinearity by reducing the peak-to-average power ratio (PAPR) of the SC-FDM signal. According to different optical signal-to-noise ratio requirements, the adaptive bit allocation can be implemented on different levels during hierarchical modulation. In the experiment, the PAPR of the hierarchical-modulated SC-FDM signal outperforms the conventional SC-FDM signal by 0.7 dB. Signals with 4- and 6-bit hierarchical modulation are successfully demodulated by the optical network unit with power penalties less than 0.2 and 0.45 dB, respectively.

Paper Details

Date Published: 25 November 2014
PDF: 5 pages
Opt. Eng. 53(11) 116115 doi: 10.1117/1.OE.53.11.116115
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Lijia Zhang, Beijing Univ. of Posts and Telecommunications (China)
Bo Liu, Beijing Univ. of Posts and Telecommunications (China)
Xiangjun Xin, Beijing Univ. of Posts and Telecommunications (China)
Yongjun Wang, Beijing Univ. of Posts and Telecommunications (China)


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