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http://hdl.handle.net/10397/107098
Title: | Joint OSNR and frequency offset estimation using signal spectrum correlations | Authors: | Zhou, J Lu, J Zhou, G Lu, C |
Issue Date: | 1-May-2021 | Source: | Journal of lightwave technology, 1 May 2021, v. 39, no. 9, p. 2854-2863 | Abstract: | We propose an efficient and modulation-format-transparent method to jointly estimate optical signal-to-noise ratio (OSNR) and frequency offset (FO) by using signal spectrum correlations for coherent optical fiber communication systems. Based on the signal spectrum correlation analysis, a coarse FO estimation (FOE) and the corresponding compensation can be conducted after chromatic dispersion compensation (CDC). Then, OSNR monitoring can be accurately operated without deterioration caused by FO. Meanwhile, to realize fine FOE, down-sampling process of signal can be used to reduce the complexity of fast Fourier transform-based FOE (FFT-FOE) without losing FOE resolution. Simulation results show that when the OSNR is in the range of 10 to 30 dB, the proposed scheme presents an absolute OSNR estimation error lower than 0.18 dB. Finally, we experimentally demonstrate our scheme in an optical back-to-back (B2B) transmission link using 28 Gbaud dual-polarization (DP)-4/16/32-quadrature amplitude modulation (QAM) formats, and an absolute OSNR estimation error lower than 0.66 dB is achieved for OSNR ranging from 15 to 30 dB. | Keywords: | Coherent communications Optical fiber communication Optical performance monitoring |
Publisher: | Institute of Electrical and Electronics Engineers | Journal: | Journal of lightwave technology | ISSN: | 0733-8724 | EISSN: | 1558-2213 | DOI: | 10.1109/JLT.2021.3063251 | Rights: | © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication J. Zhou, J. Lu, G. Zhou and C. Lu, "Joint OSNR and Frequency Offset Estimation Using Signal Spectrum Correlations," in Journal of Lightwave Technology, vol. 39, no. 9, pp. 2854-2863, 1 May 2021 is available at https://doi.org/10.1109/JLT.2021.3063251. |
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Zhou_Joint_Osnr_Frequency.pdf | Pre-Published version | 1.33 MB | Adobe PDF | View/Open |
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