Uniform circular array dual-channel interferometer direction finding method, device and system

A uniform circular array, dual-channel technology, applied in the field of interferometer direction finding, can solve problems such as system complexity, reduced direction finding accuracy, and restrictions on the efficient application of uniform circular array dual-channel interferometers

CN109959892AActive Publication Date: 2019-07-0236TH RES INST OF CETC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-07-02

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Abstract

The invention discloses a uniform circular array dual-channel interferometer direction finding method, device and system. The method provided by the invention comprises the steps that a pre-established angle estimation model is acquired, and the relationship between a direction finding error of the uniform circular array dual-channel interferometer and baseline selection is acquired; a preferred baseline which minimizes the direction finding error is acquired according to the relationship; the preferred baseline is used to carry out dual-channel time-division direction finding on the signal toacquire the phase difference measurement value of the signal; after the phase difference measurement value is substituted into the angle estimation model, the least squares method is used to solve the angle estimation model to acquire the estimated values of azimuth parameters and elevation angle parameters in the angle estimation model. According to the invention, the relationship between the direction finding error of the direction finding system of the uniform circular array dual-channel interferometer of an arbitrary unit and direction finding baseline selection is analyzed; the preferredbaseline which minimizes the direction finding error is acquired based on the relationship; and the preferred baseline is used for dual-channel time-division direction finding to give full play of the effectiveness of the direction finding system.
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Description

technical field

[0001] The invention relates to the technical field of interferometer direction finding, in particular to a uniform circular array double-channel interferometer direction finding method, device and system. Background technique

[0002] The array antenna direction finding system is an important passive direction finding equipment. Compared with the active radar system, in addition to the advantages of anti-interception and anti-jamming, it also has the advantages of high direction finding accuracy, small volume and weight, and low cost. attention in recent years. In the array direction finding system, the uniform circular array interferometer direction finding system is widely used because of its isotropy and easy application.

[0003] The commonly used uniform circular array interferometer direction finding system adopts the method of multi-array elements to measure the phase at the same time to extract the phase difference of each baseline. This method has ...

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0019] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the invention. The words "a", "an" and "the" used herein shall also include the meanings of "plurality" and "multiple", unless the context clearly indicates otherwise. In addition, the...