Cited by 11Underwater Vehicles and Communication SystemsAdvanced Wireless Communication TechniquesPAPR reduction in OFDM

Time-Varying Channel and Intrablock Carrier Frequency Offset Estimation for OFDM Underwater Acoustic Communication

Wang, Haijun, Jiang, Weihua, Hu, Qing, Zeng, Zhiyong, Li, Zhuoming·2024·IEEE Sensors Journal

Abstract

Orthogonal frequency division multiplexing (OFDM) is a prevalent scheme for medium-range high-speed underwater acoustic communication; therefore, carrier frequency offset (CFO) estimation and compensation have been widely researched to maintain the orthogonality among subcarriers. However, the CFO is assumed to be a constant, or it changes only among the OFDM blocks for convenience. Few studies have focused on the intrablock CFO, which is a practical case. In this study, a slowly time-varying channel and intrablock CFO sequential estimation for OFDM is proposed based on the relationship between the channel impulse response and the CFO. First, the relationship was introduced based on block-type pilot signals filled with chirp signals. Subsequently, the fractional Fourier transform of the chirp signals is adopted to achieve coarse channel estimation. Consequently, a differential evolution algorithm is applied to refine it iteratively. Therefore, the CFO on the pilot blocks is extracted with accurate channel estimation. Finally, the CFO of each subcarrier within the data blocks is obtained by performing interpolation in the time domain. The proposed time-varying channel and intrablock CFO estimations are verified by conducting simulation experiments based on the measured environmental parameters of Fuxian Lake. The accuracy of the channel estimation of the proposed method is significantly higher than those of the other compared methods. The accuracies of the delay and amplitude…

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Crossref · 10.1109/jsen.2024.3389298

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Authors
Wang, H., Jiang, W., Hu, Q., Zeng, Z., & Li, Z.
Affiliations
  • Sun Yat-sen University (CN)
  • Xiamen University (CN)
Venue
IEEE Sensors Journal
Published
2024-06-01
Volume
24
Issue
11
Pages
18405-18417
ISSN
  • 1530-437X (ISSN-L)
  • 1558-1748
  • 2379-9153
OpenAlex
W4394994331
Cited by
11
References
44
Citations by year
2026: 3 · 2025: 6 · 2024: 2
FWCI
1.91
Type
journal article
Language
en
Open access
closed
Locations
IEEE Sensors Journal (publishedVersion)
Funders
  • National Natural Science Foundation of China (U22A2012)
  • Southern Marine Science and Engineering Guangdong Laboratory (SML2023SP232)
Topics
  • Physical Sciences › Engineering › Ocean Engineering › Underwater Vehicles and Communication Systems
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Wireless Communication Techniques
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › PAPR reduction in OFDM
Keywords
OFDM, underwater acoustic communication, time-varying channel estimation, carrier frequency offset estimation, fractional Fourier transform, differential evolution, channel impulse response, subcarrier orthogonality, bit error rate

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