Page 181 - 《应用声学》2025年第2期

第 44 卷 第 2 期 Vol. 44, No. 2
2025 年 3 月 Journal of Applied Acoustics March, 2025

⋄ 研究论文 ⋄

基于向量近似消息传递均衡的超奈奎斯特水声通信 ∗

褚润聪 1,2 武岩波 1,3,4† 朱 敏 1,3,4

(1 中国科学院声学研究所 海洋声学技术实验室 北京 100190)
(2 中国科学院大学 北京 100049)
(3 中国科学院声学研究所 声场声信息国家重点实验室 北京 100190)
(4 北京市海洋声学装备工程技术研究中心 北京 100190)
摘要：高阶调制超奈奎斯特信号可以提高水声通信系统的频谱效率。为消除干扰需要进行多普勒时频偏
移补偿和符号均衡。为此提出基于相关峰 sinc 插值的连续定时估计方法，估计每个接收符号时变多普勒定
时偏移量，通过多普勒补偿后使每帧数据的信道近似时不变。并提出基于噪声重构的向量近似消息传递信
道估计 Turbo 均衡，利用信道估计值来重构噪声并计算噪声方差，通过内外两层迭代来挖掘符号间的约束
增益，抑制符号间干扰。距离为 900 m 的垂直水声通信海试结果表明，采用所提方法可以实现频谱效率为
1.85 bits/(s·Hz) 的超奈奎斯特信号无差错传输。
关键词：水声通信；高阶调制；超奈奎斯特；Turbo 均衡；消息传递
中图法分类号: TN929.3 文献标识码: A 文章编号: 1000-310X(2025)02-0441-13
DOI: 10.11684/j.issn.1000-310X.2025.02.019

Vector approximate message passing equalization based faster-than-Nyquist

underwater acoustic communication

CHU Runcong 1,2 , WU Yanbo 1,3,4 and ZHU Min 1,3,4

(1 Laboratory of Ocean Acoustic Technology, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)
(3 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(4 Beijing Engineering Technology Research Center of Ocean Acoustic Equipment, Beijing 100190, China)

Abstract: High order modulation faster-than-Nyquist technology can improve the spectral efficiency of under-
water acoustic communication systems. To eliminate interference, Doppler time-frequency offset compensation
and symbol equalization are required. Therefore, a continuous timing estimation method based on correlation
peak sinc interpolation is proposed, which compensate for the time-varying Doppler effect of each received
symbol, making the channel experienced by each data frame after compensation approximately unchanged in
time. And a Turbo equalization based on noise reconstruction vector approximate message passing is proposed,
which uses estimated channel to reconstruct noise and calculate noise variance. The constraint gain between
symbols is mined through inner and outer layers of iteration to suppress inter symbol interference. The sea
experiment results of vertical underwater acoustic communication at a distance of 900 meters show that the
proposed method can achieve error free transmission of faster-than-Nyquist signals with a spectral efficiency of
1.85 bits/(s·Hz).
Keywords: Underwater acoustic communication; Higher-order modulation; Faster-than-Nyquist; Turbo equal-
ization; Message passing
2023-10-23 收稿; 2024-02-06 定稿
国家自然科学基金项目 (61971472), 中国科学院战略性先导科技专项 A 类 (XDA22030101), 国家重点研发计划项目 (2021YFC2800200,
∗
2021YFC2801303)
作者简介: 褚润聪 (1996– ), 女, 河北唐山人, 博士研究生, 研究方向: 信号与信息处理。
† 通信作者 E-mail: wuyanbo@mail.ioa.ac.cn