Rapid and uniform circular array spatial spectrum direction finding implementation method

Abstract

The invention discloses a rapid and uniform circular array spatial spectrum direction finding implementation method. The anti-radiation radar antenna uniform circular array receives electromagnetic information of a target radiation source and acquires target echo IQ data; covariance matrix estimation is performed on the data received by the uniform circular array, an estimated value is obtained; characteristic value decomposition is carried out on the covariance matrix estimated value, and a characteristic value and a characteristic vector are obtained; the number of the signal sources is estimated according to the characteristic values, and the number of the target radiation sources is obtained; a signal subspace and a noise subspace are effectively constructed by utilizing the characteristic values; and the pre-installed information is combined, an effective target searching range is selected, a searching strategy is optimized, meanwhile, a table look-up method is adopted to obtain the coordinate conversion matrix of the antenna array from the polar coordinate system to the rectangular coordinate system, and spatial spectrum estimation operation is carried out to obtain the incident angle information of the multi-target radiation source. According to the rapid and uniform circular array spatial spectrum direction finding implementation method, the operation amount of the guide vector and the space spectrum estimation is greatly reduced, and rapid and accurate high-precision direction finding and stable tracking of the target can be realized.

Description

technical field [0001] The invention relates to the field of anti-radiation missile guidance, in particular to radar seeker array receiving and direction finding technology. Background technique [0002] The anti-radiation radar detects the electromagnetic waves radiated by the anti-missile radar and obtains the position information of the radar, so as to guide the missile system to attack and destroy the opponent's anti-missile radar. To a certain extent, it can suppress or break the enemy's air defense capability. In the modern battlefield have an important position. Anti-radiation radar often adopts the direction-finding method based on phase interferometer, which has the advantages of simple implementation, high real-time performance, and mature technology. However, its direction-finding accuracy and angular resolution are limited by the antenna array size and structural layout, and there are angles vague question. The electromagnetic environment of the modern battlefi...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a fast uniform circular array spatial spectrum direction finding method, which can solve the problems of large amount of computation and poor real-time performance in the existing methods

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