概率星座塑造辅助的水下声学通信与向量近似消息传递代等分
Xisheng Wu1, Dong Li2, Yanbo Wu1
1Ocean Acoustic Technology Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
The Journal of the Acoustical Society of America
|July 21, 2023
概括
概率星座塑造 (PCS) 提高了水下声学 (UWA) 通信的光谱效率. 一个基于VAMP的轮均衡器显著改善了符号检测,在深海实验中表现优于传统方法.
科学领域:
- 电气工程 电气工程
- 海洋工程 海洋工程
- 信号处理 信号处理
背景情况:
- 水下声学 (UWA) 通信系统在光谱效率和多路干扰方面面临挑战.
- 传统的UWA收发器通常在复杂的水下环境中难以优化性能.
- 概率星座塑造 (PCS) 提供了一种提高数据传输效率的潜在方法.
研究的目的:
- 提出并实验证明PCS辅助的单载波收发器,以提高UWA通信的光谱效率.
- 为PCS-UWA系统开发一个改进的频域轮均衡器,利用向量近似消息传递 (VAMP).
- 评估拟议系统的性能与传统的UWA通信方法相比.
主要方法:
- 在发射器上实施PCS技术,将编码位映射到基于非均的振幅和均的标志位分布的方格幅度调制星座.
- 在接收器上开发基于VAMP的轮均衡器,通过利用PCS衍生的先验符号概率信息来减轻多路干扰.
- 在深海环境中进行实验验证,并对浅水进行数值模拟.
主要成果:
- 与没有PCS的系统相比,PCS辅助的UWA通信系统显示出显著的性能改进.
- 提出的基于VAMP的轮均衡器的性能优于传统的自适应式轮均衡器,即使数据被重复使用.
- 通过在VAMP轮均衡器代中利用PCS信息来实现增强的符号检测性能.
结论:
- 拟议的PCS辅助单载波收发器有效地提高了UWA通信的光谱效率.
- 基于VAMP的轮均衡器为缓解PCS-UWA系统中的多路干扰提供了卓越的解决方案.
- 这项工作是对深海PCS-UWA通信系统的首次实验验证,证实了其实际可行性和优势.
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