A Modified Differential Beamforming and Its Application for DOA Estimation of Low Frequency Underwater Signal
A Modified Differential Beamforming and Its Application for DOA Estimation of Low Frequency Underwater Signal
复制标题
改进的差分波束形成及其在低频水下信号DOA估计中的应用
DOI：
10.1109/jsen.2020.2988025
复制
发表时间：
2020-08
影响因子：
4.3
通讯作者：
Kunde Yang
中科院分区：
文献类型：
--
作者：
Zhezhen Xu;Hui Li;Kunde Yang
当信号频率远低于阵列的设计频率时，常规波束形成(CBF)就会失去方向性。针对低频段水声信号，提出了一种改进的差分波束形成(MDBF)方法，并给出了该方法在波达方向(DOA)估计中的应用。本文提出的MDBF方法是传统的差分波束形成(DBF)方法的一种变形，它构造了一个带有额外鲁棒性约束的优化问题。用拉格朗日乘子法求解的MDBF具有与DBF相似的闭合形式，只是附加了两个荷载项。平面阵仿真表明，在CBF波束方向图几乎全向的频段，MDBF在稳健性上优于DBF，但代价是一定的方向性损失。通过仿真和实验数据验证了MDBF在波达方向估计中的应用。结果表明，在低频段，MDBF的DOA估计性能优于DBF和CBF。
Conventional beamforming (CBF) will lose its directivity once the signal frequency is much lower than the designed frequency of the array. In this paper, a modified differential beamforming (MDBF) method is proposed to deal with the underwater acoustic signal at low frequency band and then its application for direction of arrival (DOA) estimation with deconvolution technique is given. The MDBF proposed in this paper is a variation of the conventional differential beamforming (DBF) method and it constructs an optimization problem with an additional robustness constraint. The solution of MDBF solved via Lagrange multiplier technique owns a closed-form similar to that of DBF except two additional loading terms. Simulations with planar arrays show that for the frequency band where CBF owns an almost omnidirectional beampattern, MDBF outperforms DBF in robustness at the cost of some directivity loss. The application of MDBF for DOA estimation is demonstrated with both simulated and experimental data. The results show that the proposed MDBF outperforms both DBF and CBF in DOA estimation at low frequency band.
登录
查看更多内容
DOI：
10.1002/0471221104
发表时间：
2002
期刊：
--
影响因子：
--
作者：
H. V. Trees
通讯作者：
H. V. Trees
影响因子：
5.4
作者：
Zheng, Jimeng;Kaveh, Mostafa
通讯作者：
Kaveh, Mostafa
影响因子：
4.1
作者：
Yang, T. C.
通讯作者：
Yang, T. C.
影响因子：
3.1
作者：
Lagarias, JC;Reeds, JA;Wright, PE
通讯作者：
Wright, PE
DOI：
10.1109/oceansap.2016.7485545
发表时间：
2016-04
期刊：
OCEANS 2016 - Shanghai
影响因子：
--
作者：
T. C. Yang
通讯作者：
T. C. Yang