A Journey toward Modeling and Resolving Doppler in Underwater Acoustic Communications
A Journey toward Modeling and Resolving Doppler in Underwater Acoustic Communications
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水下声学通信中多普勒建模和解析之旅
DOI：
10.1109/mcom.2016.7402260
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发表时间：
2016-02-01
影响因子：
11.2
通讯作者：
Wu, Zhihui
中科院分区：
文献类型：
--
作者：
Qu, Fengzhong;Wang, Zhenduo;Wu, Zhihui
水声（UWA）通信是唯一可靠的水下远距离通信方式，广泛应用于商业、科学和军事场景。然而，UWA信道由于其长时间延迟和大多普勒传播的双色散特性，导致严重的多径传播和时间变化，是最具挑战性的。其中，多普勒扩频是最关键的挑战之一，为了解决UWA信道中的多普勒扩频问题，研究人员提出了各种模型。本文概述了多普勒模拟和解析的发展历程，分为四个阶段：20世纪80年代中期的准静态模式、90年代的均匀多普勒频移模式、90年代末的基展开模式和均匀路径速度模式，以及最近发展起来的非均匀路径速度模式。此外，还将讨论每种模型所利用的UWA信道稀疏性。
Underwater acoustic (UWA) communications is the only reliable method for long-distance communications underwater, and is widely used in commercial, scientific, and military scenarios. However, the UWA channel is most challenging due to its double dispersion property in both long time delay and large Doppler spread, resulting in severe multipath spread and time variation. Among these, Doppler spread is one of the most critical challenges, and researchers have proposed various models in order to resolve Doppler spread in UWA channels. In this article, an overview of Doppler modeling and resolving is provided, divided into four stages: the quasi-static model of the mid-1980s, the uniform Doppler shift model in the 1990s, the basis expansion model and uniform path speed models of the late 1990s, and the recently developed non-uniform path speed model. Furthermore, the UWA channel sparsity property utilized by each of those models will also be discussed.