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Sidelobe canceller auxiliary channel antenna selection method based on beam pattern

A beam pattern and auxiliary channel technology, applied in diversity/multi-antenna systems, sustainable communication technology, radio transmission systems, etc., can solve problems affecting the performance of sidelobe cancellers, etc.

Inactive Publication Date: 2020-10-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, while eliminating interference, the target signal is also partially canceled, which affects the performance of the sidelobe canceller to a certain extent

Method used

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  • Sidelobe canceller auxiliary channel antenna selection method based on beam pattern
  • Sidelobe canceller auxiliary channel antenna selection method based on beam pattern
  • Sidelobe canceller auxiliary channel antenna selection method based on beam pattern

Examples

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Effect test

Embodiment 1

[0101] This embodiment exemplifies the correctness of the antenna selection method for the auxiliary channel of the sidelobe canceller based on the pattern with a single array element as the unit.

[0102] Using a uniform linear array of 16 antennas such as image 3 As shown, the position of the array element is half of the source wavelength, that is, is the unit, the expected signal incident angle is 0°, there are two interferences, the incident angles are 30° and 60° respectively, and 4 array elements are selected to form the auxiliary channel for sidelobe cancellation.

[0103] According to the method of the present invention, the selected auxiliary channel positions are obtained, i.e. positions 0, 1, 10, and 11, and these four position antennas are selected as the auxiliary channels to make the main channel, auxiliary channel, and sidelobe canceller direction diagrams respectively. Figure 4(a)-Figure 4(d). It can be seen from Figure 4(a)-Figure 4(d) that in the interfer...

Embodiment 2

[0106] This embodiment supplementally verifies the correctness of the antenna selection method for the auxiliary channel of the sidelobe canceller based on the pattern with a single array element as the unit.

[0107] Using a uniform linear array of 16 antennas such as Figure 5 As shown, the position of the array element is half of the source wavelength, that is, is the unit, the expected signal incident angle is 0°, there are three interferences, the incident angles are -60°, 30° and 60° respectively, and 6 array elements are selected to form the auxiliary channel for sidelobe cancellation.

[0108] According to the method of the present invention, the selected auxiliary channel positions are obtained, that is, positions 2, 4, 5, 10, 11, and 12, and these six position antennas are selected as the auxiliary channels to make the main channel, auxiliary channel, and side lobe cancellation respectively. The device direction diagram is shown in Figure 6(a)-Figure 6(d). It can ...

Embodiment 3

[0111] This embodiment verifies the correctness of the sub-array selection method based on the pattern of the sidelobe canceller auxiliary channel with the sub-array as the unit.

[0112] Using 8 sub-arrays, each sub-array is a uniform linear array composed of three array elements, such as Figure 7 As shown, the position of the array element is half of the source wavelength, that is, is the unit, the expected signal incident angle is 0°, there are two interferences, the incident angles are 30° and 60° respectively, and three sub-arrays are selected to form auxiliary channels for sidelobe cancellation.

[0113] According to the method of the present invention, the selected auxiliary channel sub-array positions are obtained, i.e. positions 0, 5, and 7, and these three position sub-arrays are selected as auxiliary channels to make the main channel, auxiliary channel, and side lobe canceller direction diagram respectively As shown in Figure 8(a)-Figure 8(d). It can be seen fro...

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Abstract

The invention discloses a sidelobe canceller auxiliary channel antenna selection method based on a beam pattern, and the method comprises the steps: for the auxiliary channel antenna position selection in the unit of a single array element, firstly obtaining the main channel pattern by conventional beamforming, , and calculating the height of the main channel pattern in an interference direction;designing an auxiliary channel pattern according to the minimum power criterion, wherein the auxiliary channel pattern is as high as the main channel pattern in the interference direction; and calculating a superposition pattern of the two channels, finding out a relationship between main lobe distortion of a main channel pattern caused by the auxiliary channel and an antenna position selected bythe auxiliary channel, and selecting an optimal auxiliary channel antenna position according to a main lobe distortion minimum criterion. The sidelobe canceller auxiliary channel antenna selection method can be used for antenna selection of any array sidelobe canceller auxiliary channel, cancelling of interference signals is achieved from the perspective of a pattern, meanwhile, it is guaranteed that expected signals are not weakened due to introduction of the auxiliary channel, and the sidelobe canceller auxiliary channel antenna selection method can be widely adapted.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a sidelobe canceller auxiliary channel antenna selection method based on a beam pattern. Background technique [0002] The signal received by the array is usually composed of desired signal, interference signal and noise. How to eliminate the interference and noise in the received signal and design an optimal beamformer has always been a hot spot in array signal processing. Traditional methods include minimum variance distortion-free response (MVDR) beamformer, minimum power distortion-free response (MPDR) beamformer, etc. These methods all need to invert the correlation matrix of all array elements receiving signals. High computational complexity. This sometimes affects real-time performance in practical applications. [0003] In order to reduce the amount of computation, the sidelobe canceller is an effective solution. The sidelobe canceller is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0602Y02D30/70
Inventor 王向荣翟唯童王向华曹先彬
Owner BEIHANG UNIV
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