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Correlation interferometer direction finding method, system and device and storage medium

A correlation interferometer and correlation coefficient technology, which is applied in radio wave direction/deviation determination systems, direction finders using radio waves, etc., can solve problems such as weak receiving signal of the vibrator, decline in direction finding accuracy, and deviation from omnidirectional characteristics , to achieve the effect of improving the direction finding accuracy

Active Publication Date: 2021-10-29
广州辰创科技发展有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The traditional correlative interferometer direction finding technology uses omnidirectional antenna elements, mainly using the phase information received by each antenna element. After the antenna array is formed, due to the influence of mutual coupling and oscillator occlusion, the direction diagram of the antenna elements is distorted and deviates from the ideal Omni-directional characteristics, when the received signal power is low, some vibrators receive weak signals, and their phase measurement errors become larger, causing a decrease in the overall direction-finding accuracy

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  • Correlation interferometer direction finding method, system and device and storage medium
  • Correlation interferometer direction finding method, system and device and storage medium

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Embodiment 1

[0044] This embodiment provides a correlation interferometer direction-finding method, which improves the direction-finding algorithm and is applicable to single-channel, dual-channel and multi-channel correlation interferometer systems; mainly when performing correlation operations, the antenna The amplitude information of the signal received by the oscillator weights the direction finding results of the relevant interferometer to ensure that the results of the correlation calculation mainly depend on the antenna oscillator with a strong receiving amplitude, and reduce the influence of the antenna oscillator with a weak received signal amplitude on the correlation calculation results, thereby improving the Direction finding accuracy in weak signal conditions.

[0045] like figure 1 As shown, the related interferometer direction finding method of this embodiment specifically includes the following steps:

[0046] Step S1: Collect the signals received by each measuring oscilla...

Embodiment 2

[0076] This embodiment provides a correlation interferometer direction finding system, which implements the correlation interferometer direction finding method described in Embodiment 1. In this embodiment, the angular interval , eight direction-finding oscillators and a central reference oscillator constitute a direction-finding antenna array as an example to illustrate the functions of each module of the direction-finding system.

[0077] Its direction finding system mainly includes the following modules: sample library module, signal acquisition module, amplitude and phase calculation module, correlation coefficient calculation module and angle calculation module.

[0078] Wherein, after the sample data of this embodiment is collected, it can be directly used in the subsequent direction finding without repeated acquisition. The sample data collection method in the sample library module is: in advance in the standard site (open site without reflection environment), for each...

Embodiment 3

[0094] This embodiment provides a related interferometer device, which includes a processor, a memory, and a computer program stored on the memory and operable on the processor, and the embodiment is realized when the processor executes the computer program A correlation interferometer direction finding method; in addition, this embodiment also provides a storage medium on which a computer program is stored, and when the computer program is executed, the above correlation interferometer direction finding method is implemented.

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Abstract

The invention discloses a correlation interferometer direction finding method, system and device and a storage medium, and the direction finding method comprises the steps: collecting signals received by each measurement oscillator in a direction finding antenna according to a preset frequency, and obtaining the amplitude and phase information corresponding to each measurement oscillator; performing weighting processing on the phase information by using the signal amplitude, and performing correlation operation on each angle phase vector pre-stored in a phase sample library to obtain a correlation coefficient corresponding to each angle; and calculating the signal incoming wave direction according to the correlation coefficient corresponding to each angle so as to output a final direction finding result. According to the method, the signal amplitude of each antenna oscillator is normalized in the correlation operation process, and the normalized amplitude vector is used for weighting the phase correlation operation, so the influence of weak signals on the correlation result is reduced, and the direction finding precision under the weak signal condition is improved.

Description

technical field [0001] The present invention relates to the field of radio direction finding, in particular to a direction finding method, system, equipment and storage medium of a correlation interferometer. Background technique [0002] With the development of communication technology, radio interference is becoming more and more serious. In order to efficiently use limited spectrum resources and ensure smooth communication, radio monitoring and direction finding must be carried out. Radio direction finding is the process of using instruments and equipment to determine the direction of incoming radio waves based on the propagation characteristics of electromagnetic waves. [0003] Correlative interferometer is a direction-finding system developed on the basis of interferometer direction-finding. Its essence is that there is a one-to-one correspondence between the orientation of the radio signal relative to the reference direction of the antenna array and the phase distribu...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 张海拓
Owner 广州辰创科技发展有限公司