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中文核心期刊

Volume 49 Issue 4
Jul.  2024
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LI Derui, WANG Wei, LI Yu, LI Shuqiu, YU Xueyang. Cluster restricted despreading method of long-range pilot-free orthogonal multicarrier spread spectrum communication in deep sea[J]. ACTA ACUSTICA, 2024, 49(4): 753-763. DOI: 10.12395/0371-0025.2024091
Citation: LI Derui, WANG Wei, LI Yu, LI Shuqiu, YU Xueyang. Cluster restricted despreading method of long-range pilot-free orthogonal multicarrier spread spectrum communication in deep sea[J]. ACTA ACUSTICA, 2024, 49(4): 753-763. DOI: 10.12395/0371-0025.2024091
shu

Cluster restricted despreading method of long-range pilot-free orthogonal multicarrier spread spectrum communication in deep sea

  • 1.

    Institute of Acoustics, Chinese Academy of Sciences　Beijing　100190

  • 2.

    University of Chinese Academy of Sciences　Beijing　100049

  • 3.

    Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing, Chinese Academy of Sciences　Beijing　100190

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  • PACS: 
      43.60,43.30
  • Received Date: March 21, 2024
  • Revised Date: May 25, 2024
    Graphical Abstract
    • Abstract

  • A cluster-restricted pilot-free spread spectrum despreading algorithm is proposed for long-range underwater acoustic communication in deep sea. Utilizing the characteristic that the deep-sea channel structure changes slowly within a period of time, the channel prior cluster area information obtained by the pre-transmission pilot sequence is used as the constrain in the first step of pilot-free channel estimation (PFCE) algorithm to divide the channel estimate result into channel and non-channel regions. The experimental results show that the proposed method outperforms the traditional channel equalization despreading algorithm, and has a significant improvement compared to the PFCE algorithm. Compared with the PFCE, the proposed method can reach the better performance without subsequent iterative channel equalization, lower the computational complexity, and reduce the average bit error rate by 1 to 2 orders.

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    • References (22)
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