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Subarray Beam-space Adaptive Beamforming Combined with Array Shape Estimation based on Non-Acoustic Sensor

  • ACOUSTIC SIGNALS PROCESSING. COMPUTER SIMULATION
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Abstract

To address the issue of serious decline in performance of the array signal processing caused by the towed array shape distortion during maneuvering, this paper presents a new method of subarray beam-space adaptive beamforming combined with an array shape estimation method based on non-acoustic sensor. Firstly, the array shape through the approximate circular arc structure of the array segment between the adjacent sensor during maneuvering is preliminary calculated. Next, the final estimated array shape through a smooth processing method on the entire array shape by means of a calibration method using spline interpolation technique is achieved. This method is able to estimate the array shape in real time. The array steering vector based on the real-time estimation of the array shape is updated, using a subarray beam-space adaptive beamforming (SBABF) to reduce the demand of the number of the snapshots. And the beam-space covariance matrix converges fast within a few snapshots. The SBABF method combined with array shape estimation (AE-SBABF) was verified by simulation data and sea trial data processing results. During maneuvering, the AE-SBABF can not only improve the array processing gain of the target effectively, but also solve the left/right ambiguity problem well.

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ACKNOWLEDGMENTS

This study was founded by Young Elite Scientists Sponsorship Program by CAST (Grant no. 2017QNRC001) and the National Natural Science Foundation of China (Grant no. 61701450).

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Authors and Affiliations

  1. Science and Technology on Sonar Laboratory, Hangzhou, China

    Q. Wang, B. Zhou, Y. Chen & H. Quan

  2. Hangzhou Applied Acoustics Research Institute, Hangzhou, China

    Q. Wang, B. Zhou, Y. Chen & H. Quan

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  1. Q. Wang
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  2. B. Zhou
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  3. Y. Chen
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  4. H. Quan
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Correspondence to Q. Wang.

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Wang, Q., Zhou, B., Chen, Y. et al. Subarray Beam-space Adaptive Beamforming Combined with Array Shape Estimation based on Non-Acoustic Sensor. Acoust. Phys. 65, 226–233 (2019). https://doi.org/10.1134/S1063771019020106

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  • DOI: https://doi.org/10.1134/S1063771019020106

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