Correction Method for Magnitude and Phase Variations in Acoustic Arrays Based on Focused Beamforming
Correction Method for Magnitude and Phase Variations in Acoustic Arrays Based on Focused Beamforming
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基于聚焦波束形成的声阵幅度和相位变化校正方法
DOI：
10.1109/tim.2020.2972657
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发表时间：
2020-09
影响因子：
5.6
通讯作者：
Tianhao Wang
中科院分区：
文献类型：
--
作者：
Weijia Yuan;Tian Zhou;Shen Jiajun;Weidong Du;Bo Wei;Tianhao Wang
多波束探测中接收阵元之间幅度和相位变化的不一致会严重影响波束方向图特性，从而降低阵列增益，增加旁瓣电平，并恶化到达方向（DOA）估计。可以通过校正阵列元件之间的幅度和相位变化来提高波束形成结果的精确度。因此，提出了一种基于近场聚焦波束形成的新估计和校正方法来克服传统方法的缺陷。分析了幅度和相位变化模型及其对测向精度的影响。建立了多元件系统的近场聚焦波束形成模型，并采用均方根误差（RMSE）方法确定理想源入射角进行校正。我们在频域中构建接收信号协方差矩阵，并进一步估计每个阵元的幅度和相位变化。通过仿真和小型电波水槽实验验证了该方法的性能和有效性。所提出的方法需要使用提供必要旋转信息的旋转平台，因此可以准确有效地估计和校正接收阵列中元件的幅度和相位响应的变化。实验结果表明，阵列校正后旁瓣电平可降低约3 dB，角度偏差降低约1.0°。
The inconsistency in the magnitude and phase variations among the receiving array elements in multibeam soundings can seriously affect the beam pattern characteristics, which reduces the array gain, increases the sidelobe level, and deteriorates the direction-of-arrival (DOA) estimation. The accuracy of the beamforming result may be improved by correcting for magnitude and phase variations among the array elements. Therefore, a novel estimation and correction method based on near-field focused beamforming is proposed to overcome deficiencies of the conventional methods. The magnitude and phase variation model and the corresponding influence on the direction-finding accuracy are analyzed. The near-field focused beamforming model is established for multielement systems, and the root-mean-square error (RMSE) method is used to determine the ideal-source incident angle for correction. We construct the receiving signal covariance matrix in the frequency domain and further estimate the magnitude and phase variations in each array element. The performance and effectiveness of the proposed method are verified by simulations and small anechoic tank experiments. The proposed method requires the employment of a rotation platform that provides necessary rotation information and, thus, can accurately and effectively estimate and correct for variations in the magnitude and phase response of elements in the receiving array. The experimental results show that the sidelobe level can be reduced by approximately 3 dB after the array is corrected, and the angle deviation is reduced by approximately 1.0°.
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DOI：
10.1109/icassp.1988.197201
发表时间：
1988-04
期刊：
Circuits, Systems and Signal Processing
影响因子：
--
作者：
B. Friedlander;A. Weiss
通讯作者：
B. Friedlander;A. Weiss
DOI：
10.1049/ip-rsn:20045128
发表时间：
2006-07
期刊：
--
影响因子：
--
作者：
C. Qi;Z. Chen;Y. Zhang;Y. Wang
通讯作者：
C. Qi;Z. Chen;Y. Zhang;Y. Wang
DOI：
10.1109/icassp.1985.1168341
发表时间：
1985-03
期刊：
ICASSP '85. IEEE International Conference on Acoustics, Speech, and Signal Processing
影响因子：
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作者：
A. Paulraj;T. Kailath
通讯作者：
A. Paulraj;T. Kailath
DOI：
10.23919/eusipco.2017.8081642
发表时间：
2017-08
期刊：
2017 25th European Signal Processing Conference (EUSIPCO)
影响因子：
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作者：
P. Chargé;Yide Wang;P. Singh
通讯作者：
P. Chargé;Yide Wang;P. Singh
DOI：
10.1109/acssc.1988.754613
发表时间：
1991-03
期刊：
Twenty-Second Asilomar Conference on Signals, Systems and Computers
影响因子：
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作者：
A. Weiss;B. Friedlander
通讯作者：
A. Weiss;B. Friedlander