A fuzzy function-based target location method for frequency control array mimo radar

Abstract

The present invention provides a method for locating a frequency-controlled array MIMO radar target based on fuzzy functions. The coordinates of moving targets at equal intervals and in the far field construct frequency-controlled array MIMO, and construct the signal matrix received by the frequency-controlled array MIMO receiving array according to the frequency-controlled array MIMO, and then use fuzzy functions and multi-signal classification algorithms to solve the angle dimension of radar targets distance dimension information, so as to complete the positioning of the radar target, the present invention uses the fuzzy matrix instead of the correlation matrix to perform eigenvalue decomposition to solve the noise subspace and signal subspace, and then performs two-dimensional search in the time spectrum to obtain the angle and distance dimension information of the target , using this target positioning method can greatly improve the performance of far-field target positioning, and solve the problem that the frequency control array MIMO cannot accurately estimate the target information under the condition of low signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of frequency-controlled array radar, and in particular relates to a target positioning method for frequency-controlled array MIMO radar based on fuzzy functions. Background technique [0002] Due to its unique distance-angle dependence, frequency control array radar has a very wide range of applications in the fields of radar systems, wireless communications, radar imaging, target estimation and tracking, jamming and anti-jamming. Compared with the phased array, the uniform linear frequency-steered array can form an angle-distance dependent transmit beam, and can estimate the angle and distance dimensions of far-field targets. The traditional target estimation method MUSIC algorithm has a large error in estimating the angle and distance of moving targets in the case of low signal-to-noise ratio, and cannot effectively estimate the angle and distance of multiple targets when they are close. At present, the s...

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a target positioning method based on ambiguity function for frequency control array MIMO radar, which solves the problem that frequency control array MIMO cannot accurately estimate target information under the condition of low signal-to-noise ratio

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