| 稳健的高精度单矢量传感器测向方法 |
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| 引用本文： | 柳艾飞,杨德森,时胜国,李思纯,李赢.稳健的高精度单矢量传感器测向方法[J].声学学报,2020,45(4):466-474. |
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| 作者姓名： | 柳艾飞 杨德森 时胜国 李思纯 李赢 |
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| 作者单位： | 哈尔滨工程大学水声技术重点实验室 哈尔滨150001;海洋信息获取与安全工信部重点实验室(哈尔滨工程大学)工业和信息化部 哈尔滨 150001;哈尔滨工程大学水声工程学院 哈尔滨 150001;哈尔滨工程大学水声工程学院 哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金项目(61701133,11674074)和水声技术重点实验室稳定支持课题项目(SSJSWDZC2018003)资助 |
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| 摘 要： | 针对单矢量传感器各通道之间的相位误差引起已有方法测向不准的问题,提出一种对相位误差稳健的高精度测向方法.该测向方法首先利用单矢量传感器接收信号协方差矩阵的主特征向量与其共轭向量做Hadamard积来构造空间谱,实现对水下目标的方位估计;由于Hadamard积消除了相位误差,此估计值与相位误差无关,但存在方位估计模糊。然后利用相位误差的估计值进行解模糊操作,从而得到正确的方位估计。该测向方法的测向性能独立于相位误差,估计精度高。仿真和试验数据处理结果验证了该测向方法对相位误差稳健;在相位误差条件下,其方位估计精度高于平均声强法、CAPON测向方法以及MUSIC测向方法。而且仿真结果表明,该测向方法的测向精度接近克拉美洛下界(CRB)。
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| 收稿时间： | 2018-12-20 |
Roust direction of arrival estimation method with high accuracy for single vector sensor |
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| Affiliation: | 1 Acoustic Science and Technology Laboratory, Harbin Engineering University Harbin 150001;2 Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology Harbin 150001;3 College of Underwater Acoustic Engineering, Harbin Engineering University Harbin 150001 |
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| Abstract: | The phase errors among the components of a single acoustic vector sensor cause the Direction-Of-Arrival (DOA) estimation error of the existing methods.In order to address this issue,a DOA estimation method is proposed,which is robust to the phase errors.The proposed method first utilizes the Hadamard product of the principal eigenvector of the covariance matrix of the received signal by the single vector sensor and its conjugate vector to construct the spatial spectrum in order to estimate the DOA of the underwater target.Since the Hadamard product eliminates the phase errors,this estimation is independent of the phase errors.However,it is ambiguous.Afterwards,the phase-error estimate is explored to eliminate the ambiguity and get the correct DOA estimate.The proposed method performs independently of the phase errors and obtains high accuracy.The simulation results and the experimental result demonstrate the proposed method is robust to the phase errors.Furthermore,in the presence of the phase errors,it performs better than the average acoustic intensity method,the CAPON method,and the MUSIC method,in terms of estimation accuracy.In addition,the simulation results indicate that the estimation accuracy of the proposed method approaches to the CRB. |
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