Parameter estimation quaternion method for non-concurrent point electromagnetic vector sensor array

Abstract

A parameter estimation quaternion method for a non-concurrent point electromagnetic vector sensor array comprises the following steps: sampling received data of a receiving array to obtain sampling data, and superposing the sampling data according to sampling data of an electric dipole and a magnetic dipole of the same array element to constitute quaternion data; calculating an autocorrelation matrix of full-array received quaternion data, and performing quaternion feature decomposition to obtain the estimated value of an array steering vector; obtaining an airspace steering vector estimated value formed by the phase difference of a phase center of an upper sub-array relative to the origin of coordinates according to the array steering vector estimated value of the upper sub-array, and calculating the estimated value of the signal arrival angle according to the relation between an array element position matrix and a phase matrix; and reconstructing an array steering vector estimated value of an electric dipole sub-array and an array steering vector estimated value of a magnetic dipole sub-array according to the array steering vector estimated value of the upper sub-array, and obtaining the estimated value of auxiliary polarization angle and the estimated value of polarization phase angle according to the rotational invariance relation between the array steering vectors of the sub-arrays.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a method for estimating parameters of a space non-co-point electromagnetic vector sensor array. Background technique [0002] Electromagnetic vector sensor array is a new type of array that can obtain electromagnetic signal space and polarization domain information. With the rapid development of wireless communication services, scholars have achieved many valuable research results in parameter estimation based on electromagnetic vector sensor arrays, and proposed orthogonal electric dipole pairs, orthogonal tripoles, and orthogonal three magnetic Various types of electromagnetic vector sensor array parameter estimation algorithms such as loop and full electromagnetic vector sensor. [0003] figure 1 It is a schematic diagram of a cylindrical conformal electromagnetic vector sensor array in the prior art. The array elements are distributed on the upper and lower bottom...

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Problems solved by technology

In theory, the co-point dipole antenna has good performance, but in fact, due to the limitation of mechanical technology, it is difficult to realize the complete co-point of the dipole antenna, and the distance between the co-point antennas is too close, and there will be electromagnetic coupling. produce coupling error

When there is a coupling error in the array, there is a deviation between the actual array manifold and the ideal array manifold, and the parameter estimation performance will degrade or even fail completely

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