RBF-based CSB sin-FDA robust beamforming with insufficient snapshot

WANG Bo1,XIE Junwei1,ZHANG Jing2,GE Jiaang1

Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (6) : 117-124.

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (6) : 117-124.

RBF-based CSB sin-FDA robust beamforming with insufficient snapshot

  • WANG Bo1,XIE Junwei1,ZHANG Jing2,GE Jiaang1
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Abstract

In the process of suppressing the interference outside the platform which is close to the target position, the main lobe distortion of MVDR beamformer was analyzed when the number of array elements is large and the number of fast shots is insufficient.The CSB sin-FDA receiving array structure was used to replace the ULA-FDA receiving array.When the number of snapshots is insufficient, the modified covariance matrix was introduced into the fuzzy RBF neural network to calculate the optimal weight vector, which avoids the matrix inversion operation.Compared with the MVDR beamformer based on PA and FDA-BFF, in the case of low snapshot, the main lobe pointing can be kept in the target position while the effective zero notch is formed at the interference position.And the pattern only forms a single main lobe peak at the target position, which lays an important foundation for fuzzy elimination in a series of subsequent analysis of target parameter estimation.Numerical simulation verified the effectiveness of the proposed method.

Key words

MVDR beamformer / CSB sin-FDA / covariance matrix / fuzzy RBF neural network

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WANG Bo1,XIE Junwei1,ZHANG Jing2,GE Jiaang1. RBF-based CSB sin-FDA robust beamforming with insufficient snapshot[J]. Journal of Vibration and Shock, 2020, 39(6): 117-124

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