在深海水平声道中基于传递消息的单载波通信:联合干扰取消和符号检测
Yizhen Jia1,2,3, Wei Ge1,2,3,4, Zhaohui Wang5
1National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China.
The Journal of the Acoustical Society of America
|April 10, 2025
概括
这项研究引入了一种新的两步等级器,用于对抗深海声通信中严重的区块间干扰. 该JCE-IBIC-SD方法有效地取消干扰,并检测符号,即使在具有挑战性的声影区域.
科学领域:
- 水下声学通信水下声学通信
- 信号处理 信号处理
- 道均等化 道均等化
背景情况:
- 深海的水平声道呈现出广泛分离的多路径集群,在单载波块传输中造成显著的区间干扰 (IBI).
- 传统的等分器在这些通道的特征中扎着长时间的集群间延迟,导致性能降低.
研究的目的:
- 提出和评估一种新的两步等级器,联合通道估计 - 区间间干扰取消 - 符号检测 (JCE-IBIC-SD),用于减轻深海声通信中的IBI.
- 在具有挑战性的条件下证明拟议的等效器的有效性,包括不够的训练序列和声学阴影区域.
主要方法:
- JCE-IBIC-SD等分器采用两步方法:最初将长频道分解为准同步的频道,以进行代的IBI取消和符号检索,然后进行精细的联合频道估计和符号检测.
- 该算法使用了缓和的高斯通用近似消息传递稀疏的贝叶斯学习方法在联合因子图模型内用于道和符号的代估计.
主要成果:
- 拟议的JCE-IBIC-SD等分器有效地抑制IBI并提高符号检测准确性,优于传统IBI取消方法.
- 即使在有限的训练数据和在具有挑战性的深海环境中,如声学阴影区域,也可以观察到性能增长.
结论:
- 该JCE-IBIC-SD等分器提供了一个强大的解决方案,可靠的水下声学通信在深海环境中,严重的IBI.
- 该方法在合理的计算复杂度下实现了卓越的性能,使其适合于实际的深海通信系统.
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