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Hexagonal array DOA estimation algorithm based on phased array technology

An estimation algorithm, hexagonal technology, applied in the field of hexagonal array DOA estimation algorithm to achieve the effect of increasing accuracy

Active Publication Date: 2018-02-23
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

[0005] The present invention proposes a hexagonal array DOA estimation algorithm based on phased array technology to solve the technical problem of how to measure the distance and angle of a high-speed moving target based on the phased array antenna array

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  • Hexagonal array DOA estimation algorithm based on phased array technology
  • Hexagonal array DOA estimation algorithm based on phased array technology
  • Hexagonal array DOA estimation algorithm based on phased array technology

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Embodiment Construction

[0024] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] This embodiment proposes a DOA estimation algorithm for a hexagonal phased array antenna array. structured as figure 1 shown. Among them, the distance between the centers of the two hexagonal antenna bodies is 0.4λ 0 ,λ 0 is the working wavelength of the antenna of the antenna array.

[0026] The DOA estimation algorithm of the present embodiment comprises the following steps:

[0027] S1. The calibration signal is transmitted by the hexagonal antenna body for calibration, and the six hexagonal antenna bodies receive the calibration signal. According to the geometric position relationship of the six hexagonal antenna bodies, the six hexagonal antenna bodies receive the calibration signal. The phase differenc...

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Abstract

The invention belongs to the technical field of signal and information processing and specifically relates to a hexagonal array DOA estimation algorithm based on phased array technology, wherein the angle between a high-speed moving target and a ground measurement and control station can be measured. According to the invention, the small array of each phased array is subjected to phase feeding, and the directed angles of different phased arrays are adjusted. Based on the change of the phase difference between small arrays, the angle calculation is realized. According to the technical scheme ofthe invention, the core algorithm of the method comprises the steps of (1) considering the jitter of a phase center during the phase-feeding change of different small arrays; (2) estimating the phasechange of the system at different temperatures in real time; (3) by utilizing the hexagonal array arrangement of an antenna, optimizing the DOA algorithm. By adopting the technical scheme of the invention, the angle estimation accuracy of a moving target is improved.

Description

technical field [0001] The invention belongs to the technical field of signal and information processing, and in particular relates to a hexagonal array DOA estimation algorithm based on phased array technology, which can measure the angle between a high-speed moving target and a ground measurement and control station. Background technique [0002] In the current radio ranging and angle measuring methods, a typical long baseline interferometer is usually used for measurement. The higher the measurement accuracy, the longer the distance is required, and the distance is usually several kilometers or even more than ten kilometers. In this case, the expanded use of the device will be greatly restricted. However, if the ranging and angle measuring method of the phased array system is adopted, it can be realized within a phased array antenna, and the calculation convergence time is short, which is especially suitable for fast measurement under high dynamic conditions, and has a ve...

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Application Information

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IPC IPC(8): G01S3/14G01S11/02
CPCG01S3/14G01S11/02
Inventor 张涛
Owner TIANJIN JINHANG COMP TECH RES INST
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