联合等级和解码,每名幸存者进行基于超级杆的处理,在变化时间的水下声道中进行
Xu Kou1,2,3, Yanbo Wu1,2,4, Min Zhu1,2,4
1Ocean Acoustic Technology Laboratory, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
JASA express letters
|June 14, 2024
概括
这项研究引入了水下声通信的新接收方案,改善了在具有挑战性和快速变化的条件下信号恢复. 该方法在现有技术上提供了显著的性能优势.
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:
- 水下声学通信通道的特点是快速变化的时间条件和符号间干扰.
- 最大概率序列估计 (MLSE) 对于可靠的数据恢复是可取的,但在计算上是复杂的.
- 现有的接收系统在动态通道条件下难以保持性能.
研究的目的:
- 为高级水下声通信提出一个低复杂度的联合等级和解码接收方案.
- 为了使MLSE能够在快速变化的水下声道中应用.
- 提高水下通信系统的性能和稳定性.
主要方法:
- 开发了一种新的超级杆每幸存者处理 (PSP) 方法.
- 该方案整合了网格编码调制 (TCM) 状态与符号间干扰 (ISI) 状态.
- PSP被用来动态跟踪频道参数,适应时间变化.
- 为任意顺序的正方形振幅调制 (QAM) 信号提供了一个一般的托盘配置,用于ISI状态的截断通道模型.
主要成果:
- 与传统方法相比,拟议的方案显示出优越的性能.
- 海上试验证实了超过1.4dB的性能提升.
- 低复杂度的设计使MLSE可用于实际的高级水下声系统.
结论:
- 开发的联合等分和解码方案有效地处理快速变化的水下声道.
- 超级底式PSP方法提供了显著的性能改善和计算效率.
- 这种技术提高了高级QAM在具有挑战性的水下环境中的可靠性和适用性.
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