Wave arrival direction estimation method based on L-shaped electromagnetic vector sensor array

Abstract

The invention discloses a wave arrival direction estimation method based on an L-shaped electromagnetic vector sensor array, which mainly solves the problem that the mutual coupling is large and the parameter estimation precision is not consistent in a two-dimensional wave arrival direction estimation method of an existing nested array, and the realization steps are as follows: (1) constructing anL-shaped electromagnetic vector sensor array; (2) establishing a received data model of a target signal; (3) calculating the signal subspace matrix of the array; (4) calculating the cosine estimationvalue of the L-shaped array on the target signal; (5) calculating a fuzzy direction cosine estimation value of a single split electromagnetic vector sensor for a target signal; (6) calculating the cosine estimation value of the target signal direction after de-blurring; (7) obtaining the two-dimensional wave arrival direction of the target. According to the invention, the two-dimensional wave arrival direction estimation of the L-shaped electromagnetic vector sensor array is realized, and the method can be used for target positioning in radar and communication.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a direction-of-arrival estimation method based on an L-shaped array and an electromagnetic vector sensor in the technical field of radar. The invention can be used for estimating the direction of arrival of the target signal by the radar antenna, thereby obtaining the angle positioning of the target by the radar and improving the angle measurement performance of the radar antenna for the target signal. Background technique [0002] Electromagnetic vector sensor array radar is a new system radar with great potential to adapt to modern warfare. Compared with the conventional array, the electromagnetic vector sensor array can perceive the electromagnetic components of the incident wave in different directions, thereby extracting more information such as polarization, etc., and the combination of polarization domain information and spatial domain information can further i...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that since the array unit of the array is a common-point electromagnetic vector sensor, the mutual coupling between the components of the electromagnetic vector sensor is relatively large, which affects the estimation of the two-dimensional direction of arrival of the target. Accuracy

However, the disadvantage of this method is that it only estimates in one direction of expansion, resulting in inconsistent parameter estimation accuracy.

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