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Method for extending DOA matrix in double-parallel-array two-dimensional direction finding

A dual-parallel, matrix technology used in direction finders using radio waves, radio wave direction/bias determination systems, complex mathematical operations, etc.

Active Publication Date: 2019-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for extending the DOA matrix in the two-dimensional direction finding of the double parallel array, which fully utilizes the autocorrelation information and cross-correlation information of the received signals of the array to construct an extended DOA matrix, and solves the problem of double parallel arrays. Under-array 2D DOA estimation problem

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  • Method for extending DOA matrix in double-parallel-array two-dimensional direction finding
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  • Method for extending DOA matrix in double-parallel-array two-dimensional direction finding

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Embodiment Construction

[0038] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0039] Symbol representation: use (·) in the present invention T Indicates the matrix transpose, ( ) H Indicates matrix conjugate transpose, ( ) * indicates matrix conjugation, uppercase letter X indicates matrix, lowercase letter x( ) indicates vector, I M Expressed as an M×M identity matrix, Represents the Hadamard product, diag(v) represents a diagonal matrix composed of elements in v, E[·] represents the expectation of the matrix, and angle(·) represents the phase angle operation.

[0040] 1. Data model

[0041] The signal receiving array consists of figure 1 The two parallel linear sub-arrays are shown, and the two sub-arrays are called X a and Y a . Each s...

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Abstract

The invention discloses a method for extending a DOA matrix in double-parallel-array two-dimensional direction finding. According to the method, an autocorrelation matrix and a cross-correlation matrix of received data of a double parallel array are completely utilized for constructing an extended DOA matrix; and then the characteristics of the DOA matrix are decomposed, so that to-be-estimated signal direction vector and signal direction element can be directly obtained, and two-dimensional DOA angle estimation of a to-be-estimated signal is obtained. Compared with a traditional DOA matrix method, the method provided by the invention has better DOA estimation performance because the autocorrelation matrix and the cross-correlation matrix of the received data of the double parallel array are completely utilized. The method provided by the invention does not need spatial spectrum search and has relatively low algorithm complexity; and an obtained DOA estimation angle can realize automatic pairing.

Description

technical field [0001] The invention relates to an extended DOA matrix method used in two-dimensional direction finding of a double parallel array, in particular to an angle estimation method of a far-field signal source, and belongs to the technical field of array signal processing. Background technique [0002] The traditional DOA matrix method constructs the DOA matrix according to the properties of the covariance matrix. Through the eigendecomposition of the DOA matrix, the signal direction vector and signal direction elements to be estimated can be directly obtained, and the signal parameters can be estimated from this, thereby completely avoiding the polynomial search, and the calculation amount is relatively small, but because the array is not fully used to receive the signal The autocorrelation information and cross-correlation information of , so the performance of 2D DOA angle estimation is low. Contents of the invention [0003] The technical problem to be solv...

Claims

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Application Information

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IPC IPC(8): G01S3/14G06F17/16
CPCG01S3/14G06F17/16
Inventor 张小飞戴祥瑞郑旺李建峰何益
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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