Filterbank-Assisted Channel Estimation for Coherent Optical FBMC/OQAM System


Alaghbari, Khaled Ab. Aziz and Lim, Heng Siong and Eltaif, Tawfig and Jin, Benzhou and Lee, Lian Hong (2022) Filterbank-Assisted Channel Estimation for Coherent Optical FBMC/OQAM System. IEEE Photonics Journal, 14 (6). pp. 1-7. ISSN 1943-0647

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In this paper, a new channel estimator for optical filter bank multicarrier with an offset-QAM modulation (FBMC/OQAM) system is proposed. The conventional channel estimation techniques that are based on interference approximation method (IAM) preamble with least squares (LS) approach suffers from sensitivity to intrinsic imaginary interference (IMI). Therefore, a filterbank-assisted (FB) technique is proposed to eliminate the residual interference associated with the preamble to improve the performance of optical FBMC/OQAM system. To further enhance the system performance, a thresholding block is added between the synthesis and analysis filter banks at the receiver to suppress the residual interference. Simulation findings show that the proposed channel estimator is more effective than the conventional IAM-R and IAM-C with LS based channel estimation at estimating the optical channel that includes chromatic dispersion and residual IMI.

Item Type: Article
Uncontrolled Keywords: FBMC/OQAM , channel estimation , intrinsic interference , chromatic dispersion , filter bank , DFT
Subjects: Q Science > QC Physics > QC350-467 Optics. Light
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 14 Mar 2023 02:46
Last Modified: 14 Mar 2023 02:46


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