Target parameter estimation method based on FDA-MIMO radar

A target parameter, radar technology, applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, measurement devices, etc. The effect of solving coupling and improving estimation performance

Active Publication Date: 2019-06-18
XIDIAN UNIV
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Problems solved by technology

Some scholars have used nonlinear frequency offset methods to solve this problem, such as the square method, cubic method, log method, etc., to a certain extent, these methods have achieved the coupling of the FDA-MIMO system radar transmit beams, but different frequency offsets The target launch beam of the method will affect the performance of the beam, that is, the radar can only better estimate the parameters of a single target or the parameters of multiple targets at the same angle. When the distances and angles of multiple targets are different, false targets will appear. lead to a significant decrease in the estimation performance of the radar

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] figure 1 A schematic flow chart of a target parameter estimation method based on FDA-MIMO radar provided by the embodiment of the present invention, refer to figure 1 , the method provided by the embodiment of the present invention includes the following steps:

[0027] Step 1. Set the radar transmitting end to have M transmitting array elements, the receiving end to have N receiving array elements, and the distance between adjacent transmitting array ...

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Abstract

The invention belongs to the radar signal processing technology field and discloses a target parameter estimation method based on an FDA-MIMO radar. The method comprises the following steps of designing a frequency increment resulting in wave beam coupling and an array element spacing, breaking linearly increasing synchronization between the two, achieving a decoupling effect, and providing a condition for unique estimation of a target distance angle; and through designing, making the frequency increment of each array element satisfy a sinc function increasing relation, and then carrying outangle and distance estimation to obtain an accurate target angle and distance information. By using the method of the invention, coupling of an emission wave beam at a distance-angle can be solved. When the distances and the angles of multiple targets are different, the distance and the angle of the target is well estimated to avoid occurrence of false targets, and estimation performance of the radar is improved.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a target parameter estimation method based on FDA-MIMO radar, which can be used for parameter estimation of FDA-MIMO system radar. Background technique [0002] Multiple-input multiple-output (English full name: Multiple-Input Multiple-Output, English abbreviation: MIMO) radar can provide flexible transmission beams according to different working modes, but similar to traditional phased arrays, MIMO radar transmission beams are only aligned with the target It is related to the angle of the target, and it is impossible to distinguish targets with the same angle but different distances. In addition, if there is interference from the same angle but different distances, the positioning performance of MIMO radar will be greatly affected. [0003] The concept of Frequency Diversity Array (full English name: Frequency Diverse Array, English abbreviation: FDA) was first ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/02G01S7/41
Inventor 朱圣棋罗丹许京伟曾操廖桂生李军茆健王鹏辉
Owner XIDIAN UNIV
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