Phase interferometer direction finding method for ambiguity resolution by extension baselines

A phase interferometer and deblurring technology, which is used in direction determination direction, radio wave measurement systems, instruments, etc., can solve the problems of high calculation amount, low utilization of array element information, inaccurate direction finding, etc. The effect of direction finding accuracy, improving the efficiency of the direction finding system, and reducing the amount of calculation

Inactive Publication Date: 2012-04-11
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] Aiming at the technical problems of inaccurate direction finding and high calculation amount caused by the low utilizat

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  • Phase interferometer direction finding method for ambiguity resolution by extension baselines
  • Phase interferometer direction finding method for ambiguity resolution by extension baselines
  • Phase interferometer direction finding method for ambiguity resolution by extension baselines

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[0029] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0030] The present invention provides a phase interferometer direction finding method based on the idea of ​​correlation method to resolve ambiguity. Through the present invention, the two-dimensional direction finding accuracy of the correlation interferometer can be improved, while reducing the amount of calculation and improving the performance of the direction finding system. Direction finding performance.

[0031] The present invention mainly selects a triangular array from the circular array. First, the direction cosine is solved by the phase difference between the elements of the triangular array, and then the direction cosine is substituted into the phase difference theoretical calculation formula of the circular array, and the circular array is completed through correlation operations. Unblur, finally solve the exact...

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Abstract

The invention belongs to the technical field of communication radar. An equilateral triangular array is selected as a rough measurement array in a circular array, the phase difference between two baselines in a triangular matrix is calculated, and possible actual phase differences are exhaustively listed according to the maximum ambiguity degree; the possible actual phase differences are substituted to a circular array phase difference solving formula to build a phase difference vector sample library; the ambiguity degree of the actual circular array phase difference is obtained by a related operation, and further an actual circular array phase difference vector is obtained; and finally, an incident angle value as an accurate DOA (Direction of Arrival) estimate is inversely solved by finding the least squares solution of direction cosine. The novel phase interferometer two-dimensional direction finding algorithm for ambiguity resolution by extension baselines is applied, so that higher precision can be obtained compared with a direction finding algorithm based on a related operation, and the required amount of computation is greatly reduced. The method is a high-performance angle measurement algorithm.

Description

technical field [0001] The invention belongs to the technical field of communication radar, in particular to a phase interferometer direction finding method in radio monitoring. Background technique [0002] In the existing direction finding system, phase interferometer direction finding has the advantages of passive direction finding, high direction finding accuracy, high sensitivity, good real-time performance, etc., and can be applied to various antenna array forms, so it is widely used in electronic reconnaissance field direction finding system. In the military field, it can locate radiation sources such as radar, communication, and measurement and control, and can play an important role in the implementation of targeted electronic jamming and military strikes; in the civilian field, it can be used for traffic control, life rescue, and radio spectrum management etc. [0003] In phase interferometer direction finding, the multi-valued phase or ambiguity is the key issue...

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Application Information

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IPC IPC(8): G01S3/46
Inventor 蒲刚贾可新程婷何子述吴奉微李亚星蒋林鸿张昕郑攀邹丁秋
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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