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Unmanned aerial vehicle cluster direction finding system and method based on non-uniform intelligent metasurface array

A metasurface, non-uniform technology, used in radio wave measurement systems, radio wave direction/bias determination systems, direction finders using radio waves, etc., to solve the problem of poor estimation accuracy, reduce computational complexity, and reduce complexity. Effect

Pending Publication Date: 2021-11-19
SOUTHEAST UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a UAV cluster direction finding system and method based on a non-uniform intelligent metasurface array, in order to solve the sparsity characteristics of mining signals in the airspace under the condition of reducing the system cost, and adopt the no-network based atomic norm Technical Problems of Angle of Arrival Estimation for Lattice Sparse Reconstruction Problem

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  • Unmanned aerial vehicle cluster direction finding system and method based on non-uniform intelligent metasurface array
  • Unmanned aerial vehicle cluster direction finding system and method based on non-uniform intelligent metasurface array
  • Unmanned aerial vehicle cluster direction finding system and method based on non-uniform intelligent metasurface array

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Embodiment Construction

[0037] In order to better understand the purpose, structure and function of the present invention, a UAV swarm direction finding system and method based on a non-uniform intelligent metasurface array of the present invention will be described in further detail below with reference to the accompanying drawings.

[0038] like figure 1 As shown, the UAV swarm direction finding system based on the non-uniform intelligent metasurface array includes two parts: the intelligent metasurface array with non-uniform unit spacing and a single omnidirectional receiving antenna; the intelligent metasurface integrates low-cost varactor diodes inside, By changing the bias voltage of the varactor diode, the amplitude and phase of the incident signal can be changed; compared with the uniform linear array, the distance between the intelligent metasurface array is non-uniform, and the position of the array element is deviated from the ideal position of the array element ; The omnidirectional recei...

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Abstract

The invention discloses an unmanned aerial vehicle cluster direction finding system and method based on a non-uniform intelligent metasurface array. The system employs the non-uniform intelligent metasurface array to carry out the multiple measurement of an incoming wave, and receives a reflection signal through an omnidirectional receiving antenna. A reflected signal model after multiple times of measurement is constructed for signals received by an omnidirectional receiving antenna, and a solution expression of an unknown angle of arrival is theoretically derived by mining airspace sparse characteristics of an UAV cluster target and adopting a sparse reconstruction algorithm. According to the method, a new atom norm is constructed, a sparse reconstruction problem is established, a positive semidefinite programming problem is used for solving a corresponding convex optimization problem, and sparse estimation of the UAV cluster signal arrival angle is achieved.

Description

technical field [0001] The invention belongs to the field of array signal processing, and in particular relates to a UAV cluster direction finding system and method based on a non-uniform intelligent metasurface array. Background technique [0002] Signal angle of arrival (DOA) estimation is an important part of array signal processing. Antenna arrays usually use large-scale RF channels, which are costly. [0003] In recent years, smart metasurfaces have been widely used in wireless communication, signal processing and radar. The intelligent metasurface integrates a large number of low-cost passive reflection elements on a plane, controls the amplitude / phase of the reflection unit to adjust the reflection direction of the incident signal, and intelligently reconstructs the propagation environment of wireless electromagnetic waves. In practical application, the intelligent metasurface can be arranged on any building surface, and the array element spacing is random. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/143
Inventor 陈鹏杨子晗
Owner SOUTHEAST UNIV
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