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3 February 2021 Using a New Channel Estimation Algorithm to Improve Underwater Acoustic Communication with Multiple Receivers
Xin Hu, Yingmin Wang, Feiyun Wu, Aiping Huang
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Hu, X.; Wang, Y.; Wu, F., and Huang, A., 2021. Using a new channel estimation algorithm to improve underwater acoustic communication with multiple receivers. Journal of Coastal Research, 37(4), 779–783. Coconut Creek (Florida), ISSN 0749-0208.

Underwater acoustic (UWA) communication with multiple receivers has been developed for underwater wireless data transmission, because the receiving array can improve the reliability of the system by using spatial diversity. In this paper, a channel estimation algorithm is proposed that fully uses UWA channel sparsity for single-input, multiple-output (SIMO) communication. The proposed algorithm integrates L0 norm into the cost function of the improved proportionate normalized least-mean-square (IPNLMS) algorithm based on L0 norm. The performance of the L0 norm–constrained IPNLMS, IPNLMS based on L0 norm, and the proposed algorithm is studied in terms of normalized misalignment for SIMO UWA channel estimation. In addition, the influence of the number of receivers on channel estimation accuracy is analyzed. Finally, the numerical simulation results demonstrate the superiority of the proposed algorithm in terms of robustness, which achieves the lower normalized misalignment than the other two algorithms in a shallow-water acoustic channel estimation.

©Coastal Education and Research Foundation, Inc. 2021
Xin Hu, Yingmin Wang, Feiyun Wu, and Aiping Huang "Using a New Channel Estimation Algorithm to Improve Underwater Acoustic Communication with Multiple Receivers," Journal of Coastal Research 37(4), 779-783, (3 February 2021).
Received: 21 October 2020; Accepted: 1 December 2020; Published: 3 February 2021
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Underwater acoustic (UWA) communications
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