CLC number: TN98
On-line Access: 2023-01-21
Received: 2021-08-22
Revision Accepted: 2023-01-21
Crosschecked: 2021-11-01
Cited: 0
Clicked: 2656
Dongzhou ZHAN, Sitian WANG, Shougui CAI, Huarong ZHENG, Wen XU. Acoustic localization with multi-layer isogradient sound speed profile using TDOA and FDOA[J]. Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/FITEE.2100398 @article{title="Acoustic localization with multi-layer isogradient sound speed profile using TDOA and FDOA", %0 Journal Article TY - JOUR
基于到达时间差和到达频率差的多层等梯度声速剖面建模与声学定位1浙江大学信息与电子工程学院,浙江省杭州市,310027 2浙江大学海洋学院浙江省海洋观测-成像试验区重点实验室,浙江省舟山市,316021 摘要:在水下媒介中,声速随着水深、温度和盐度而变化。水体的不均匀性导致声线弯折,使得现有基于声信号直线传播假设的定位算法不够精确。为实现水下声学传感网络中的高精度节点定位,本文首先使用线性分割近似方法,提出多层等梯度声速剖面(sound speed profile,SSP)模型。基于此模型,可将声线跟踪问题转化为多项式寻根问题。利用传感器节点处信号多普勒频移的导数,提出一种新的使用到达时间差(time difference of arrival,TDOA)和到达频率差(frequency difference of arrival,FDOA)的水下节点定位算法。通过模拟仿真,可以证明所提算法的有效性。与传统基于直线传播假设的方法相比,所提算法可有效处理声线弯折现象。此外,研究了不同SSP建模误差下的估计精度。总体而言,新提出的方法可以实现准确可靠的节点定位。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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