Monostatic MIMO radar DOA estimation method under impact noise background

A shock-noise, monostatic technique for radar detection applications
CN110806557AInactive Publication Date: 2020-02-18NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2020-02-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a monostatic MIMO radar DOA estimation method under an impact noise background. The method comprises the steps: step one, carrying out impact noise modeling based on S alpha Ssteady-state distribution and impact noise suppression based on a Cauchy kernel function; step two, carrying out signal subspace construction based on an iterative convex optimization algorithm; and step three, realizing DOA estimation based on a rotation invariant method. According to the invention, the iterative solving of array receiving data signal subspace is realized by using a complex-valued Newton gradient descent algorithm to solve a solution problem of the Cache kernel function; and after multi-times iteration, the signal subspace with good performance is obtained. The suppression ofthe impact noise is realized by using the Cache kernel function; and a DOA estimation problem under the background of the impact noise in the monostatic MIMO radar is solved. The azimuth parameter information estimation result is relatively accurate; and good incoming wave azimuth estimation is realized while spectral peak search is avoided.
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Description

【Technical field】

[0001] The invention discloses a single base MIMO radar DOA estimation method under the background of impact noise, which belongs to the technical field of radar detection, and specifically relates to the passive positioning of single base multiple-input multiple-output (MIMO) radar, especially the single base MIMO under the background of impact noise Direction of Arrival (DOA) estimation technique for radar. 【Background technique】

[0002] MIMO radar is a new system radar, which can form multiple observation channels in space by transmitting mutually orthogonal signals at the transmitting end and performing orthogonal matching filtering at the receiving end, and can suppress environmental noise , clutter and other irrational signals have greatly improved their own survivability and target detection capabilities, and have broad application prospects.

[0003] At present, the research on DOA estimation of MIMO radar is mainly carried out based on the Gaussi...

Claims

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