高速非连贯的水下声学通信使用变换字母和滑动假设树解码
1FOI Swedish Defence Research Agency, Stockholm, 164 90 Sweden.
The Journal of the Acoustical Society of America
|March 7, 2024
概括
一个新的滑动假设树解码 (SHDT) 框架可以实现强大的水下声通信. 这种方法在具有挑战性的通道中实现了低错误率,优先考虑解码而不是同步,以实现可靠的数据传输.
科学领域:
- 电气工程 电气工程
- 信号处理 信号处理
- 水下通信是指水下通信.
背景情况:
- 水下声学 (UWA) 通道由于时间多普勒位移和多路径传播,给可靠的通信带来了重大挑战.
- 在这些不利条件下,现有的通信系统经常在联合同步和解码方面扎.
研究的目的:
- 引入一种新的框架,滑动假设树解码 (SHDT),用于UWA通信中的联合同步和解码.
- 证明SHDT在构建强大的非连贯通信链路方面的有效性.
主要方法:
- 开发了SHDT框架,用于联合同步和解码.
- 使用极地编码和超级变换频率转换键构建了一个不连贯的链接.
- 在基准UWA频道 (水标,波罗的海) 上使用重播模拟来评估链接性能,随机时间多普勒位移.
- 在高流动性浅水水平通道中测试了链接.
主要成果:
- 达到0.149-0.222位/秒/Hz的光谱效率.
- 在七个不同的UWA频道中展示了低误差率.
- 确认了成功的同步和解码器性能,与真实世界不利通道中的模拟相提并论.
- 展示了SHDT将性能限制从同步解码到信息解码分离的能力.
结论:
- 在具有挑战性的UWA环境中,SHDT为联合同步和解码提供了强大的解决方案.
- 该框架使得可靠的通信,即使在非视线和高流动性的场景.
- SHDT特别适用于需要可靠的数据传输的低速率通信方法.
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