Frequency Synchronization Based on a Cascading Cross-Correlation Function for CO-FBMC-OQAM

WANG Daobin; CHEN Bo; LYU Ningning; WANG Wei; LIU Junjie; YUAN Lihua

doi:10.1049/cje.2020.05.019

Volume 29 Issue 4

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Article Navigation > Chinese Journal of Electronics > 2020 > 29(4): 724-730

WANG Daobin, CHEN Bo, LYU Ningning, et al., “Frequency Synchronization Based on a Cascading Cross-Correlation Function for CO-FBMC-OQAM,” Chinese Journal of Electronics, vol. 29, no. 4, pp. 724-730, 2020, doi: 10.1049/cje.2020.05.019

Citation:

WANG Daobin, CHEN Bo, LYU Ningning, et al., “Frequency Synchronization Based on a Cascading Cross-Correlation Function for CO-FBMC-OQAM,” Chinese Journal of Electronics, vol. 29, no. 4, pp. 724-730, 2020, doi: 10.1049/cje.2020.05.019

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Frequency Synchronization Based on a Cascading Cross-Correlation Function for CO-FBMC-OQAM

doi: 10.1049/cje.2020.05.019

1.
School of Science, Lanzhou University of Technology, Lanzhou 730050 China;
2.
School of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Funds: This work is supported by the National Natural Science Foundation of China (No.61367007), the Natural Science Fund of Gansu Province of China (No.17JR5RA123), and HongLiu First-Class Disciplines Development Program of Lanzhou University of Technology.

Received Date: 2019-11-22
Rev Recd Date: 2020-01-15
Publish Date: 2020-07-10

Abstract

Abstract

We present a robust frequency synchronization algorithm for the Coherent optical Offset quadrature-amplitude modulation based Filter-bank multicarrier (CO-FBMC-OQAM) systems. It is a two-stage method operating in the frequency domain, which expands the estimated range of the normalized fractional frequency offset to (-1, +1). We designed and introduced a cascading cross-correlation function of real-valued pilots to roughly estimate the frequency offset in the first stage. The residual frequency offset was accurately tracked by a non-cascading cross-correlation function afterwards. This approach enlarges the maximum estimated range, and also resists interference and noise. A CO-FBMC-OQAM system with the sampling rate of 50 Gsample/s was numerically investigated to evaluate the frequency-offset estimation and compensation capability. All obtained results prove that the proposed frequency synchronization method can correct the laser-frequency offset and improve the transmission performance significantly.
- CO-FBMC-OQAM,
- Carrier frequency offset,
- Frequency synchronization,
- Cascading crosscorrelation function

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References(29)

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