一种基于包络相关的水下动态节点测距方法

发布时间：2018-04-13 08:21

本文选题：浅海水域 + 水下节点　；参考：《中国测试》2016年09期

【摘要】：针对浅海海域的水声环境复杂多变,由水听器直接观测的信号常常被一些噪声覆盖的情况,提出一种基于包络相关的水下动态节点测距方法,并实现对水下动态节点进行精确的距离测量。根据测距信号在浅海水域信道传播的特性,对接收到的信号进行巴特沃斯粗滤波、小波变换细去噪、包络相关的方法处理,有效保留信号的边沿、突变的信息,去除噪声的影响,通过将两通道的信号进行包络相关取得精确的时延差,并依据距离公式对节点间的距离进行精确测量。水域实验结果表明,通过比较节点间距离的误差,算法测距精度达到13 cm以内。
[Abstract]:In view of the complex and changeable underwater acoustic environment in shallow sea area where the signals observed directly by hydrophone are often covered by some noise a method of underwater dynamic node ranging based on envelope correlation is proposed.And the accurate distance measurement of underwater dynamic nodes is realized.According to the characteristics of ranging signal propagating in shallow water channel, the received signal is processed by Butterworth coarse filter, wavelet transform fine denoising, envelope correlation method, which can effectively retain the information of signal edge and mutation.The noise is removed and the time-delay difference is obtained by the envelope correlation of the two channel signals and the distance between nodes is measured accurately according to the distance formula.The experimental results show that the accuracy of the algorithm is less than 13 cm by comparing the errors of the distance between nodes.
【作者单位】：中北大学信息探测与处理技术研究所;
【基金】：国家自然科学基金(61471325) 高等学校博士学科点专项科研基金(博导类)(20121420110006)
【分类号】：P733.2;TB56

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