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A Robust Adaptive Beamforming Method Based on Interference Covariance Matrix Reconstruction

An adaptive beam, interference covariance technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., to achieve the effect of less coupling effect, high resolution, and high degree of freedom

Active Publication Date: 2021-12-14
UNIV OF SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, adaptive beamforming methods that take into account both DOF enhancement and robustness have rarely been proposed

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  • A Robust Adaptive Beamforming Method Based on Interference Covariance Matrix Reconstruction
  • A Robust Adaptive Beamforming Method Based on Interference Covariance Matrix Reconstruction
  • A Robust Adaptive Beamforming Method Based on Interference Covariance Matrix Reconstruction

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] Embodiments of the present invention provide a method for reconstructing a more accurate interference-plus-noise covariance matrix based on semi-positive definite constraints and obtaining a higher degree of freedom based on a virtual uniform matrix, making full use of the advantages of the mutual prime matrix formation, and at the same time Enhance the robustness of the beamformer in case of arbitrary errors. Such as figure 1 As shown, the method mainly...

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Abstract

The invention discloses a mutual prime array robust adaptive beamforming method based on the reconstruction of the interference covariance matrix. The sampling covariance matrix is ​​reconstructed on the virtual uniform array, and the expected signal components are removed by projection. According to the semi-positive definite Constraints estimate the exact power and direction of each interference, reconstruct the interference covariance matrix, estimate the noise power in the noise angle region, and obtain the interference plus noise covariance matrix; then the main The eigenvalue is used as the steering vector of the desired signal, and the weight vector of the robust adaptive beamformer based on the mutual prime array can be obtained to form the output of the robust adaptive beamformer.

Description

technical field [0001] The present invention relates to the research field of beamforming in the field of array signal processing, in particular to a robust adaptive beamforming method based on interference covariance matrix reconstruction, especially in non-ideal situations where various errors may exist , and when the number of interferences may exceed the number of array elements, the robustness of adaptive beamforming under various errors can be greatly improved through the precise reconstruction of the interference plus noise covariance matrix by taking advantage of the structural advantages of the mutual prime array sex. Background technique [0002] Recently, a series of robust adaptive beamforming methods based on uniform linear arrays have been proposed. In order to satisfy the Nyquist sampling theorem, the array element spacing of uniform arrays is equal to half the wavelength, so the array aperture is directly determined by the number of array elements. In additi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0408H04B7/06
CPCH04B7/0408H04B7/0617
Inventor 叶中付孙思聪朱星宇
Owner UNIV OF SCI & TECH OF CHINA