# 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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## AI-Extracted Technical Summary

### Problems solved by technology

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View more## 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.

Application Domain

Direction finders

Technology Topic

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