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A method of doa estimation based on l-matrix and two-dimensional esprit algorithm

A technology of DOA and algorithm, applied in directions such as direction finders using radio waves, radio wave direction/deviation determination systems, etc., can solve the problems of not being able to suppress the influence of noise well, errors in array direction finding results, and complex construction forms, etc. Achieve the effect of improving resolution and statistical performance, removing the influence of statistical independent noise sources, and simple matrix form

Active Publication Date: 2022-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

For the two-dimensional direction finding based on the L array, some two-dimensional ESPRIT methods have been proposed before, but these methods have the problems of complex structure and high calculation amount, and cannot suppress the influence of noise well, and cannot be used in radar signal processing. Balance the relationship between performance and computing cost well, and the array direction finding results will always have large errors

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  • A method of doa estimation based on l-matrix and two-dimensional esprit algorithm
  • A method of doa estimation based on l-matrix and two-dimensional esprit algorithm
  • A method of doa estimation based on l-matrix and two-dimensional esprit algorithm

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Embodiment Construction

[0050] The performance of the present invention will be described below in conjunction with the accompanying drawings and simulation.

[0051] The method proposed by the present invention is simulated and verified by using Matlab. Computer simulation environment: Microsoft Windows 10 operating system, Matlab 2020a software, AMD R7-4800U processor (supports AVX instruction set), 16GB DDR4-3200 memory.

[0052] (1) DOA direction finding estimation performance of the inventive method

[0053] Simulation 1: The direction accuracy of the method varies with the signal-to-noise ratio

[0054] The total number of L-array elements in the space is 13, the number of elements of the four sub-arrays is 7, the data length of the simulated signal is 500 snapshots, and the incoming wave direction of the signal is (60°, 60°). Under different signal-to-noise ratios, 1000 Monte-Carlo experiments are carried out, and the angle estimation RMSE of the method of the present invention is obtained w...

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Abstract

The invention belongs to the technical field of radar signal processing, and in particular relates to a DOA estimation method based on an L array and a two-dimensional ESPRIT algorithm. The present invention proposes a DOA estimation method based on the L array and the two-dimensional ESPRIT algorithm. After the array receives the radiation source signal, the array data is processed by using the array characteristics of the L array, and the data used for the operation of the two-dimensional ESPRIT algorithm is constructed. Matrix, get the estimated angle, and complete the direction measurement estimation of the signal source. The beneficial effect of the present invention is that the present invention utilizes the L array to construct a large matrix, and the obtained matrix has a simple form, which maintains a relatively low computational complexity in the subsequent direction finding process, effectively removes the influence of statistically independent noise sources, and improves The resolving power and statistical performance in Gaussian noise environment are improved.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a DOA estimation method based on an L array and a two-dimensional ESPRIT algorithm. Background technique [0002] In radar signal processing, the direction of arrival (DOA) estimation of the target radar emitter signal based on the L array has always been the focus of research. However, with the increasingly dense modern electromagnetic spectrum, higher pulse density and With the application of high-power electronic equipment, the electromagnetic environment is becoming more and more complex. The traditional DOA estimation method based on the MUSIC algorithm faces the problems of low direction finding accuracy and high computational complexity. At the same time, most of these methods are only applicable to one-dimensional For DOA estimation, the direction-finding ability of two-dimensional angles in the actual space is lacking, and it is still a relati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 林仕文周亚文邹炜钦李万春
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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