Small-scale array direction finding method based on bionic technology

Abstract

The invention relates to the technical field of array signal processing, and discloses a small-scale array direction finding method based on a bionic technology. The method comprises the steps that the number of array elements, the spacing of array elements and the array formation rule are set to acquire a basic array; a coupling unit is set to comprise multiple input signals, and the coupling unit is equivalent to a mechanical model, and then is converted into a circuit model to acquire a coupling circuit; the parameters of the coupling circuit are determined through simulation; the output signals of the array elements are input into the coupling circuit, and the amplitude difference of a number of signals of the basic array is amplified by the coupling circuit; the output signals of thearray elements are converted into digital signals by AD sampling after passing through a coupling structure, and the digital signals are uploaded to a processor; array signal processing is completed in the processor; and the target orientation is estimated. According to the invention, high-precision direction finding of a small-scale basic array is realized under the condition of high signal-to-noise ratio; the size of the basic array is greatly reduced; and the flexibility, maneuverability and concealability of installation and deployment of an array direction finding system are improved.

Description

technical field [0001] The invention relates to the technical field of array signal processing, in particular to a small-scale array direction finding method based on bionic technology. Background technique [0002] With the development of science and technology, array signal processing technology has always been the focus of academic research, and the research results have been widely used in many fields such as radar, sonar, wireless communication, astronomy, biomedicine, geological survey and navigation. The DOA estimation technology derived from the field of array signal processing plays an important role in both military and civilian fields. [0003] The DOA estimation method mainly receives the incoming wave signal through the array antenna combined according to certain rules, and estimates the direction of the outgoing wave according to the time delay between the received signal of different array elements and the reference array element. This method generally assume...

AI Technical Summary

Problems solved by technology

However, no matter what estimation method is used, the distance between adjacent elements of the array antenna must satisfy the half-wavelength array principle, and in order to obtain higher array gain and angular resolution, the number of array elements is generally large, and the array size is very large. It is not conducive to installation and deployment, and the mobility and concealment of equipment are poor

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