Comparison of Data-Aided SFO Estimation Algorithms in DDO-OFDM

We investigate the estimation error, convergence speed, and computational complexity of the three commonly used sampling frequency offset (SFO) estimation algorithms based on training sequence (TS), cyclic prefix (CP), and pilot under different signal-to-noise ratios (SNRs) and received optical powe...

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Published in:2022 Asia Communications and Photonics Conference (ACP) pp. 714 - 717
Main Authors: Gao, Xu, Chen, Ming, Zhu, Xiaoli, Huang, Shishi, Zhou, Jie, Cai, Yuxin
Format: Conference Proceeding
Language:English
Published: IEEE 05.11.2022
Subjects:
Adaptive optics
cyclic prefix
Estimation error
Frequency division multiplexing
Frequency estimation
OFDM
orthogonal frequency division multiplexing
pilot
sampling frequency offset
Simulation
Training
training sequence
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Abstract We investigate the estimation error, convergence speed, and computational complexity of the three commonly used sampling frequency offset (SFO) estimation algorithms based on training sequence (TS), cyclic prefix (CP), and pilot under different signal-to-noise ratios (SNRs) and received optical powers (ROPs) by numerical simulation and offline experiment in a short-reach direct-detection optical OFDM transmission system. The results showed that the pilot-based algorithm's estimation accuracy (< 14 ppm) is relatively low for the initial SFOs in the range of ±200 ppm, while the estimation error of both TS-based and CP-based algorithms is stable within 0.6 ppm. Moreover, pilot-based and TS-based algorithms exhibit a faster convergence speed than the CP-based one. And the computational complexity of the SFO estimation algorithms based on CP, TS, and pilot decreases sequentially.
AbstractList We investigate the estimation error, convergence speed, and computational complexity of the three commonly used sampling frequency offset (SFO) estimation algorithms based on training sequence (TS), cyclic prefix (CP), and pilot under different signal-to-noise ratios (SNRs) and received optical powers (ROPs) by numerical simulation and offline experiment in a short-reach direct-detection optical OFDM transmission system. The results showed that the pilot-based algorithm's estimation accuracy (< 14 ppm) is relatively low for the initial SFOs in the range of ±200 ppm, while the estimation error of both TS-based and CP-based algorithms is stable within 0.6 ppm. Moreover, pilot-based and TS-based algorithms exhibit a faster convergence speed than the CP-based one. And the computational complexity of the SFO estimation algorithms based on CP, TS, and pilot decreases sequentially.
Author Huang, Shishi
Chen, Ming
Zhou, Jie
Zhu, Xiaoli
Cai, Yuxin
Gao, Xu
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  organization: Hunan Normal University,School of Physics and Electronics,Changsha,China,410081
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Snippet We investigate the estimation error, convergence speed, and computational complexity of the three commonly used sampling frequency offset (SFO) estimation...
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SubjectTerms Adaptive optics
cyclic prefix
Estimation error
Frequency division multiplexing
Frequency estimation
OFDM
orthogonal frequency division multiplexing
pilot
sampling frequency offset
Simulation
Training
training sequence
Title Comparison of Data-Aided SFO Estimation Algorithms in DDO-OFDM
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