An Array Extension Method Based on Combination of Sub-array Covariance Matrices

被引：0
|
作者：
Liang G. [1 ,2 ,3 ]
Luo J. [3 ]
Hao Y. [1 ,2 ,3 ]
Fu J. [1 ,2 ,3 ]
机构：
[1] National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Heilongjiang, Harbin
[2] Key Laboratory of Marine Information Acquisition and Security of Ministry of Industry and Information Technology, Harbin Engineering University, Heilongjiang, Harbin
[3] College of Underwater Acoustic Engineering, Harbin Engineering University, Heilongjiang, Harbin
来源：
Binggong Xuebao/Acta Armamentarii | 2024年 / 45卷 / 05期
关键词：
array extension; covariance matrix; direction-of-arrival estimation; grating lobe; weak target detection;
D O I：
10.12382/bgxb.2022.1076
中图分类号：
学科分类号：
摘要：
A linear array extension method based on combination of sub-array covariance matrices is proposed to solve the problem of performance deterioration of signal detection and azimuth estimation under low signal-to-noise ratio. The proposed method divides the array into odd and even sub-arrays, and the extended received data is constructed by using the cross-covariance and auto-covariance matrices of the two sub-arrays. Finally, the final extended signal is obtained by combining the extended received data. The proposed method breaks through the physical aperture of array, and avoids the problem of grating lobe when using the cross-covariance of odd and even sub-arrays only to reconstruct the received data. Simulated results show that the proposed method can be used to reduce the sidelobe of beam output, and has good weak target detection ability and azimuth resolution. Compared with the array extension algorithm based on the cross covariance of odd and even sub-arrays, the proposed method can provide higher azimuth estimation accuracy. © 2024 China Ordnance Industry Corporation. All rights reserved.
引用
收藏
页码：1717 / 1724
页数：7
相关论文
共 24 条
  • [1] DONG Y Y, DONG C X, LIU W, Et al., 2-D DOA estimation for l-shaped array with array aperture and snapshots extension techniques, IEEE Signal Processing Letters, 24, 4, pp. 495-499, (2017)
  • [2] MAO W N, QIAN J., A linear array extension based on sub-arrays covariance matrix, Acta Armamentarii, 43, 5, pp. 1129-1134, (2022)
  • [3] LI B B, ZHANG X F, LI J F, Et al., DOA estimation of noncircular source for large uniform linear array with a single snapshot: extended dft method[J], IEEE Communications Letters, 25, 12, pp. 3843-3847, (2021)
  • [4] LI H, LIU Z W, XU Y G., Aperiodic vector antenna switching based direction of arrival estimation for noncircular signals[C], Proceedings of the 2021 4th International Conference on Information Communication and Signal Processing, pp. 50-54, (2021)
  • [5] SUN Z G, BAI Q S, BAI Y Z, Et al., Improved weighted spatial smoothing algorithm based on virtual array expansion, Systems Engineering and Electronics, 45, 1, pp. 250-256, (2023)
  • [6] DUAN H L, HUANG D S, ZHOU L Y, Et al., A decorrelation algorithm based on virtual array extension [C], Proceedings of the 7th International Conference on Communications and Networking in China, pp. 348-351, (2012)
  • [7] QIAN Y N, CHEN Y W, CAO X R, Et al., Broadband aperture extension of a passive sonar array using multi-dimension autoregression model, Proceedings of the 2020 International Conference on Sensing, Measurement & Data Analytics in the Era of Artificial Intelligence, pp. 502-506, (2020)
  • [8] LU J M., Fuzzy solution based on least squares virtual array algorithm, Electronic Science and Technology, 22, 11, pp. 9-11, (2009)
  • [9] LI Y B, ARCE G R., A maximum likelihood approach to least absolute deviation regression, EURASIP Journal on Advances in Signal Processing, 12, pp. 1762-1769, (2004)
  • [10] WANG Q, GONG X F, LUO R S., Coherent sources number estimation based on circular array virtual array translation, Computer Engineering, 44, 9, pp. 78-82, (2018)
123