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A Direction Finding Method Based on Compressive Sampling of Multi-polarization Vector Antenna Array

An antenna array and compressed sampling technology, which is applied in the field of direction finding in the field of array signal processing, can solve problems such as difficulties in implementation, and achieve the effects of improving direction finding performance, reducing antenna mismatch, and increasing the number of array antennas

Active Publication Date: 2022-06-14
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional direction finding scheme, the number of antennas is equal to the number of channels of the multi-channel receiver processor, which is limited by the weight, volume, power consumption, signal processing resources, etc. Polarization diversity is difficult to realize in engineering

Method used

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  • A Direction Finding Method Based on Compressive Sampling of Multi-polarization Vector Antenna Array
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  • A Direction Finding Method Based on Compressive Sampling of Multi-polarization Vector Antenna Array

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Embodiment 1

[0058] In this embodiment, the direction finding device is such as image 3 As shown, the flow chart of the direction finding device is as follows: Figure 4 shown.

[0059] The specific steps of the direction finding method based on the direction finding device are as follows:

[0060] S1. Acquire data received by the antenna array; the data received by the antenna array are radiation signals output by multiple radiation sources that overlap in the time domain;

[0061] S2. Use the signal processing module to generate a pseudo-random sequence, and construct a random observation matrix;

[0062] Among them, the pseudo-random sequence can be generated by scientific computing software such as MATLAB, and loaded into the signal processing module in advance, and the random observation matrix can be formed by sorting the pseudo-random sequence by column.

[0063] S3, using the random observation matrix to compress and sample the data received by the antenna array to obtain array...

Embodiment 2

[0087] In this example, by carrying out the radiation source test in the microwave anechoic chamber, the test scene is as follows Figure 5 shown. The direction finding device is installed on the turntable and controlled remotely by a computer. Three radiation source antennas are erected at the other end of the darkroom, and the target simulator generates the adopted signals and radiates them through the antennas. The method proposed in the present invention is used to measure the angle of arrival of multiple radiation source signals. Among them, the radiation source signal conditions are set as follows:

[0088] 1) Radiation source angle Set to (-5°, -15°), (9°, 3°), (-10°, 20°) respectively.

[0089] 2) Set the radiation source target simulator to generate 3 signals, and the radiation source signals overlap in the time domain.

[0090] The specific steps for measuring the angle of arrival of the signal by using the method proposed by the present invention are as follow...

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Abstract

The invention discloses a direction finding method and device based on compressed sampling of multi-polarization vector antenna arrays. The method includes the following steps: Step 1. Obtain data received by the antenna array; the data received by the antenna array is output by multiple radiation sources There are overlapping radiation signals in the time domain; step 2, use the signal processing module to generate a pseudo-random sequence, and construct a random observation matrix; step 3, use the random observation matrix to perform compressed sampling on the data received by the antenna array, and obtain array compressed sampling data; step 4. According to the compressed sampling data of the array, a noise subspace is obtained; Step 5. According to the noise subspace, an angle of arrival of the data received by the antenna array is determined. Under the condition that the number of receiving channels remains unchanged, the invention reduces the influence of antenna polarization mismatch and improves the performance of direction finding by only increasing the number of partial array antennas and combining the radio frequency network to compress and sample the array.

Description

technical field [0001] The invention relates to the technical field of direction finding in the field of array signal processing, in particular to a direction finding method and device based on multi-polarization vector antenna array compression sampling. Background technique [0002] The existing traditional direction finding device generally adopts the scheme of single-polarized circular array combined with multi-channel receiving processor. In this scheme, a vector antenna array is used, and the polarization information of the signal is sensed by using the different polarization characteristics of multiple single-polarized antennas. The signal is filtered and amplified by the radio frequency network, down-converted to the multi-channel acquisition module, and finally the arrival angle of the signal is calculated in the signal processing module. In the single-polarized annular array, a plurality of single-polarized antenna elements are uniformly arranged in a ring to form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 沈志博王浩丞朱全江唐勇刘俊
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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