High-precision rapid radio direction finding method and system

Abstract

The embodiment of the invention provides a high-precision rapid radio direction finding method and system. The method combines the advantages of interferometer direction finding and spatial spectrum direction finding, and proposes an interferometer-spatial spectrum direction finding algorithm. According to the interferometer-spatial spectrum direction finding algorithm, the characteristic that the direction finding speed of an interferometer is high is utilized, a result with a large error is obtained through direction finding of the interferometer, then spectrum peak searching is carried out near the angle through the spatial spectrum direction finding algorithm according to the result, an angle measurement result is obtained, and the spectrum peak searching range is greatly narrowed. The algorithm solves the problems of low precision of direction finding by only adopting an interferometer and high complexity and low speed of direction finding by only adopting a spatial spectrum in the prior art. The interferometer-spatial spectrum direction finding algorithm can simultaneously meet the requirements of high direction finding precision, high direction finding speed and low algorithm complexity, and is beneficial to engineering implementation.

Description

technical field [0001] The present invention relates to the field of radio technology, and more specifically, to a high-precision fast radio direction finding method and system. Background technique [0002] The direction finding accuracy of the interferometer direction finding algorithm is usually a few degrees, and the direction finding accuracy is lower. Taking the L-band signal as an example, the target range of the general direction finding accuracy is not greater than 2°. In the process of communication reconnaissance or radar reconnaissance, if the single-station passive positioning method is used to determine the location information of the reconnaissance target, its positioning accuracy mainly depends on the direction-finding accuracy of the reconnaissance target. Low direction finding accuracy will lead to low positioning accuracy of the scouted target, making it impossible to achieve precise positioning of the scouted target. [0003] Radio direction finding can...

AI Technical Summary

Problems solved by technology

Low direction finding accuracy will lead to low positioning accuracy of the scouted target, making it impossible to accurately locate the scouted target

[0003] Radio direction finding can also use the spatial spectrum direction finding algorithm. The space spectrum estimation algorithm is a technology that has emerged in recent years and has the characteristics of high direction finding accuracy. Taking the L-band signal as an example, the direction finding accuracy of this algorithm can reach the target The range is not greater than 0.5°, but the algorithm is highly complex and requires a high-performance processor to meet the calculation requirements, and the high-performance processor consumes a lot of power, which brings great difficulties to engineering implementation

And in order to obtain higher direction finding accuracy, the spatial spectrum estimation algorithm needs to perform multiple iterations, which increases the processing delay and reduces the real-time performance of direction finding.

Images