Tensor modeling based DOA (direction of arrival) and polarized parameter estimation method of polarized array

Abstract

The invention relates to a tensor modeling based DOA and polarized parameter estimation method of a polarized array, belongs to the techcnial field of radar array signal processing, and aims at solving the problem that a present DOA and polarized estimation method of the polarized array via an electromagnetic vector sensor needs to search / solve DOA and polarized parameters in a combined way and ishigh in calculating complexity. The method comprises that 1) a 4D tensor covariance is constructed according to received data; 2) two dimensions of the obtained 4D tensor covariance are transposed and then projected into a 2D matrix according to the sequence in the spatial and polarization domains; 3) singular value decomposition or characteristic value decomposition is carried out on the 2D matrix in the step 2), and a DOA estimated value is solved further; and 4) the DOA estimated value obtained in the step 3) is used to estimate an array guiding matrix, and the polarized parameter vector is estimated. The method can be used to solve the DOA and polarization parameter of the polarized array structure in any linear arrangement independently, and the computing complexity is reduced.

Description

technical field [0001] The invention relates to a polarization array direction-of-arrival and polarization parameter estimation method based on tensor modeling, and belongs to the technical field of radar array signal processing. Background technique [0002] With the development of modern communication and the increasingly complex electromagnetic environment, people have higher and higher requirements for the performance of communication systems and electronic systems. The polarized array composed of electromagnetic vector sensors can simultaneously obtain the spatial information of space electromagnetic signals and Polarized information has attracted people's attention. It has a wide range of applications in the fields of radar, sonar, communication and biomedicine. [0003] The existing polarization array DOA and polarization parameter estimation method composed of electromagnetic vector sensors needs to jointly search and solve the DOA and polarization parameters, or is...

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Problems solved by technology

[0004] In order to solve the problem of the direction of arrival and polarization parameter estimation method of the polarization array formed by the existing electromagnetic vector sensor, the present invention needs to jointly search and solve the direction of arrival and polarization parameters, and the problem of high computational complexity is proposed. Estimation Method of Direction of Arrival and Polarization Parameters Based on Modular Polarimetric Arrays

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