Joint Time and Frequency Synchronization for OFDM Systems over Underwater Acoustic Channels

Orthogonal frequency division multiplexing (OFDM) is a promising technique for underwater acoustic communications due to its high spectral efficiency and robustness to multipath fading. However, OFDM systems are sensitive to timing and frequency synchronization errors. This paper proposes a novel sc...

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Bibliographic Details
Published in2023 International Conference on Advanced Technologies for Communications (ATC) pp. 6 - 11
Main Authors Khuong, Nguyen Quoc, Du, Han Ngoc, Luu, Ngoc-Minh, Van Huy, Nguyen, Van Duc, Nguyen
Format Conference Proceeding
LanguageEnglish
Published IEEE 19.10.2023
Subjects
Doppler effect
Error analysis
Fading channels
OFDM
Robustness
Spectral efficiency
Symbols
Synchronization
underwater acoustic communication
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Summary:Orthogonal frequency division multiplexing (OFDM) is a promising technique for underwater acoustic communications due to its high spectral efficiency and robustness to multipath fading. However, OFDM systems are sensitive to timing and frequency synchronization errors. This paper proposes a novel scheme for joint time and frequency synchronization in OFDM-based underwater acoustics communication systems. The proposed scheme is based on the application of a conventional pilot and a special pilot, which is named Carrier Frequency Pilot, to detect the information of carrier frequency offset, and the sampling position. The performance of the proposed scheme is evaluated by using computer simulations. The results show that the proposed scheme can provide accurate time and frequency synchronization results. It significantly outperforms the conventional schemes in terms of symbol error rate.
ISSN:2162-1039
DOI:10.1109/ATC58710.2023.10318942