Method for multi-parameter joint estimation of distributed type electromagnetic vector sensor array

Abstract

The invention relates to a method for multi-parameter joint estimation of a distributed type electromagnetic vector sensor array and belongs to the field of array signal processing. Received data of the distributed type electromagnetic vector sensor array are constructed, covariance matrixes are performed on received data of an electric dipole and a magnetic dipole respectively and adding summation is performed, a covariance matrix sum only containing an information source azimuth parameter is obtained, a sparse signal reconstruction method is utilized to estimate the information source incident azimuth; and the estimation of polarization parameters is obtained by utilizing maxtrix relations of autocovariance and cross covariance of an electric dipole array and a magnetic dipole array. According to the method, the joint estimation of multi-dimensional parameters is converted into substep estimation of a plurality of one-dimensional parameters, the calculation complexity of the method is lowered; by distributed placing of electric dipole and magnetic dipole sensors, not only is the cross coupling influence between array elements reduced, but also the array physical pore diameter is extended effectively, and the parameter estimation accuracy is improved greatly.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to a multi-parameter joint estimation method of a distributed electromagnetic vector sensor array. Background technique [0002] Compared with the scalar sensor array, the electromagnetic vector sensor array has many advantages such as stronger anti-interference ability and higher resolution, which improves the resolution ability of the signal source with a closer spatial distance and the estimation accuracy of the source azimuth angle. These advantages make it have important military and civil application value and broad application prospects. [0003] Since the electromagnetic vector sensor can receive all the electric field components and magnetic field components of the incident electromagnetic wave, the vector array can obtain more incident signal information, and the polarization parameter, as an inherent property of the electromagnetic wave, has become one of the key re...

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Problems solved by technology

[0006] The invention provides a multi-parameter joint estimation method of a distributed electromagnetic vector sensor array to solve the mutual coupling effect when the antennas of the electromagnetic vector sensor are placed at the same point, which affects the estimation performance, and to solve the multi-parameter joint estimation based on the sparse signal reconstruction method Difficult meshing problem

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