High-resolution accurate two-dimensional direction-of-arrival estimation method based on planar co-prime array virtual domain tensor spatial spectrum search

A direction estimation, virtual domain technology, applied in the direction/bias determination system of radio waves, the directional device for determining the direction, the direction finder using radio waves, etc. Aliasing etc.

Active Publication Date: 2020-09-01
ZHEJIANG UNIV
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Problems solved by technology

However, the existing method is still based on the actual received tensor signal processing, and does not use the two-dimensional virtual domain of the planar coprime array to construct the tensor space spectrum, and does not solve the problem of the signal mismat...

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  • High-resolution accurate two-dimensional direction-of-arrival estimation method based on planar co-prime array virtual domain tensor spatial spectrum search
  • High-resolution accurate two-dimensional direction-of-arrival estimation method based on planar co-prime array virtual domain tensor spatial spectrum search
  • High-resolution accurate two-dimensional direction-of-arrival estimation method based on planar co-prime array virtual domain tensor spatial spectrum search

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[0132] Simulation example: using a coprime array to receive the incident signal, its parameter is selected as M x = 2, M y = 2,N x = 3, N y = 3, that is, the coprime array of the architecture contains 4M x m y +N x N y -1=24 physical array elements. Assume that the number of incident narrowband signals is 1, and the azimuth and elevation angles of the incident direction are [45°, 50°] respectively; the simulation experiment is carried out with L=500 sampling snapshots and an input signal-to-noise ratio of 10dB.

[0133] The space spectrum of the high-resolution and accurate two-dimensional DOA estimation method based on the planar coprime array virtual domain tensor space spectrum search proposed by the present invention is as follows: Figure 4 shown. It can be seen that the method proposed in the present invention can effectively construct a two-dimensional spatial spectrum, wherein there is a sharp spectral peak corresponding to the two-dimensional direction of arri...

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Abstract

The invention discloses a high-resolution accurate two-dimensional direction-of-arrival estimation method based on planar co-prime array virtual domain tensor spatial spectrum search, and mainly solves the problems of signal multi-dimensional information loss and spatial spectrum resolution and accuracy limitation in the existing method. The method comprises the following implementation steps: constructing a planar co-prime array; modeling a receiving signal tensor of the planar co-prime array; deriving a virtual domain equivalent signal based on a planar co-prime array second-order mutual correlation tensor; constructing an equivalent received signal of a virtual domain uniform area array; deriving a fourth-order autocorrelation tensor of the virtual domain smooth signal; realizing signaland noise subspace classification based on multi-dimensional feature extraction of a virtual domain autocorrelation tensor; and high-resolution accurate two-dimensional direction-of-arrival estimation based on virtual domain tensor spatial spectrum search. According to the method, high-resolution accurate two-dimensional direction-of-arrival estimation based on tensor spatial spectrum search is realized on the basis of multi-dimensional feature extraction of virtual domain tensor statistics of the planar co-prime array, and the method can be used for passive detection and target positioning.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a statistical signal processing technology based on planar coprime array tensor signals, specifically a high-resolution and accurate two-dimensional direction of arrival based on planar coprime array virtual domain tensor space spectrum search Estimation method that can be used for passive detection and spatial localization. Background technique [0002] As a two-dimensional sparse array with a systematic architecture, the planar coprime array has the characteristics of large aperture and high resolution. Compared with the traditional uniform array, it can realize the comprehensive performance of two-dimensional DOA estimation in terms of estimation accuracy and resolution. At the same time, by constructing a two-dimensional virtual domain, the signal processing that meets the Nyquist matching condition can be performed on the uniform array in the virt...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/143
Inventor 郑航周成伟史治国王勇陈积明
Owner ZHEJIANG UNIV
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