Cross-ice acoustic communication: Cascade acoustic channel model and experimental results
Cross-ice acoustic communication: Cascade acoustic channel model and experimental results
复制标题
DOI：
10.23919/jcc.2021.02.015
复制
发表时间：
2021-02
影响因子：
4.1
通讯作者：
Jingwei Yin;Wei Men;Guangping Zhu;Xiao Han
中科院分区：
文献类型：
--
作者：
Jingwei Yin;Wei Men;Guangping Zhu;Xiao Han
跨冰声学信息传输是极地海冰覆盖海域有效的通信手段。然而，由于水、冰和空气的综合影响，该通道极其复杂。基于简正波理论，建立了水下声波跨冰层传播的级联声信道模型。该模型通过分离水中的向上波和简正波，再乘以传递系数矩阵，计算冰层上表面的位移响应。采用有限元法计算了冰层上表面位移响应与声波频率的关系，计算结果与CAC模型的结果一致。为了验证模型的适用性，2019年1月在松花江进行了跨冰声学通信实验。实验结果表明，地震检波器接收到的声波信号能量与声波频率密切相关，跨冰声波通信是可行的。研究结果对了解极地海域跨冰声信道特性和开展跨冰声通信具有重要意义。
Cross-ice acoustic information transmission is an effective means of communication in polar sea areas covered by ice. However, the channel is extremely complicated because of the combined influence of water, ice, and air. Based on the normal-mode theory, this paper establishes a cascade acoustic channel (CAC) model for the transmission of under-water acoustic waves across ice layer. The model cancalculate the displacement response of the ice layer's upper surface by separating the upward waves from normal modes in the water and multiplying it by at ransmission coefficient matrix. The relationship between the displacement response of the upper surface of ice layer and the acoustic frequency is calculated by the finite-element method, and the calculation result was consistent with that of the CAC model. To verify the applicability of the model, a cross-ice acoustic communication experiment was conducted in Songhua River in January 2019. Experimental results show the energy of the acoustic signals received by geo-phones is closely related to sound frequency and cross-ice acoustic communication is feasible. The result of present research is important for understanding cross-ice acoustic channel characteristics and developing future cross-ice acoustic communication in polar sea areas.