Robust Precoder for Mitigating Inter-Symbol and Inter-Carrier Interferences in Coherent Optical FBMC/OQAM


Lim, Heng Siong and A. Eltaif, Tawfig Ahmad and Al-Aghbari, Khaled Abdulaziz (2019) Robust Precoder for Mitigating Inter-Symbol and Inter-Carrier Interferences in Coherent Optical FBMC/OQAM. IEEE Photonics Journal, 11 (4). pp. 1-16. ISSN 1943-0655

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Impact Statement: New precoder for optical FBMC/OQAM is designed based on PEVD technique to compensate for ISI and ICI by exploiting mutual impact between subcarriers. Adaptive optimum energy technique is proposed to truncate trivial precoder coefficients. FBMC/OQAM is 5G waveform candidate and pre-compensation of optical channel effects is very useful for some applications. Simulation results show the proposed precoder outperforms the conventional precoder in terms of EVM, BER, and computational complexity. Abstract: In this paper, a new precoder for a coherent optical filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) system is proposed. The precoder is designed based on an iterative polynomial eigenvalue decomposition (PEVD) algorithm to jointly mitigate the inter-symbol interference and inter-carrier interference. The PEVD algorithm is used to decompose a polynomial channel matrix into polynomial eigenvectors and eigenvalues matrices, then a precoder is designed based on the decomposed matrices. The precoder acts as a filter applied to each subcarrier and to its adjacent subcarriers. In addition, a new adaptive optimum energy algorithm is proposed to truncate the insignificant precoder filter coefficients produced by the PEVD algorithm and consequently reduce the computational complexity. A mathematical model and algorithm for implementing the precoder are also presented. Robustness of the proposed precoder has been analyzed and compared to existing precoder in optical channel with different dispersion effects. Numerical results demonstrate that the new precoder significantly outperforms the existing precoder in terms of error vector magnitude, bit error rate, Frobenius norm of the error matrix, and computational complexity.

Item Type: Article
Uncontrolled Keywords: Optical image, Precoder, coherent optical FBMC/OQAM, PEVD algorithms, inter-symbol interference, inter-carrier interference.
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA1501-1820 Applied optics. Photonics
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 24 Feb 2022 03:24
Last Modified: 24 Feb 2022 03:24


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