Radar arrival direction estimation method and device, computer device, and storage medium

Abstract

The invention belongs to the field of radar signal processing, and provides a radar arrival direction estimation method and device, a computer device, and a storage medium.The radar arrival directionestimation method comprises the following steps that a matrix X composed of echo signals of K received targets is subjected to a dimension reduction process toobtain a dimension reduction data matrixY; a sparse signal model is constructed based on the dimension reduction data matrix Y; an objective function used for estimating the echo power of the K targets is obtained according to the sparse signal model; the echo signal power in the objective function non-uniform noise covariance matrix are initialized and updated; grid points in need of location update in the sparse signal model are updated through polynomial rooting; when the number of iterationsof an algorithm reaches a preset upper limit or when the algorithm converges, the updated spatial discrete gridis subjected to a one-dimensional space spectrum searching to obtaina multi-input and multi-output radar arrival direction estimated value. The radar discrete grid arrival direction estimation method and device, the computer device, and the storage medium has the advantages of being robust both to non-uniform noise and the discrete grid,performance isstill good in a rough grid, and accuracy is high.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a radar direction-of-arrival estimation method, device, computer equipment and storage medium. Background technique [0002] In the past few decades, MIMO radar system, as a new type of radar system, has been the focus of research in the field of signal processing due to its high resolution and superior parameter estimation performance. The use of MIMO radar system to estimate the direction of arrival (Direction-of-arrival, DOA) of the target has also attracted much attention. According to different antenna array configuration methods, MIMO radar systems can be roughly divided into two types: statistical MIMO radar (statistical MIMO radar) and co-located MIMO radar (colocated MIMO radar). Monostatic MIMO radar is one of the co-located MIMO radar systems. For the signal DOA estimation problem, researchers have proposed a large number of effective methods based o...

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Problems solved by technology

[0005] An embodiment of the present invention provides a radar direction-of-arrival estimation method, which aims to solve the problem in the prior art that the estimation performance is significantly attenuated under the influence of non-uniform noise, thereby limiting its practicability and accuracy.

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