Information source number estimation method for polarization sensitive array

Abstract

The invention discloses an information source number estimation method for a polarization sensitive array. The method includes the following steps that spatial electromagnetic wave signals are received through a polarization sensitive array formed by N polarization sensitive array elements, and receiving data are obtained; a covariance matrix is calculated according to the data received by the polarization sensitive array; feature value decomposition is conducted on the covariance matrix, 2 N feature values and feature vectors corresponding to the 2 N feature values are solved, and the 2 N feature values are sorted in a descending mode from big to small; feature removal treatment is conducted on the covariance matrix through the sorted front N feature values, corresponding N new covariance matrixes are obtained, and a projection matrix is built through sub spaces formed by the feature vectors corresponding to the sorted rear N feature values; projection on the projection matrix of the N new covariance matrixes is solved respectively; the information source number is estimated according to a projection structure criterion function. According to the information source number estimation method for the polarization sensitive array, the information source number is estimated through a noise sub spatial dimension feature of the polarization sensitive array, the calculated amount is reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the research field of high-resolution direction-finding algorithms in signal processing, and in particular relates to a method for estimating the number of sources of polarization-sensitive arrays using the characteristic of the subspace dimension of polarization-sensitive array noise. Background technique [0002] The polarization-sensitive array is an array formed by placing the polarization-sensitive array elements in a certain form in space. The polarization information of the electromagnetic wave can be obtained by using the polarization-sensitive array elements. The polarization information is represented by the polarization-sensitive array elements. The correlation characteristics between orthogonal channels, while the spatial information is expressed as the spatial phase delay between adjacent array elements, so the spatial arrangement of polarization-sensitive arrays can be used to obtain spatial information. Polarizat...

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Problems solved by technology

However, the above existing source number estimation methods are all derived under the traditional scalar sensor array model, and the existing source number estimation methods for polarization-sensitive arrays all directly use the source number estimation algorithm of the traditional scalar array Extended application to the estimation of polarization-sensitive arrays does not take into account the characteristics of polarization-sensitive arrays

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