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Monostatic MIMO radar DOA estimation method under impact noise background

A shock-noise, monostatic technique for radar detection applications

Inactive Publication Date: 2020-02-18
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The invention discloses a DOA estimation method for single-base MIMO radar under the background of impact noise. The technical problem to be solved is: for single-base MIMO radar, the Cauchy kernel function is used to suppress the impact noise of single-base MIMO radar, combined with iterative convex optimization algorithm and Accurate DOA Estimation of Monostatic MIMO Radar Using Signal Subspace Rotation Invariant Method

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  • Monostatic MIMO radar DOA estimation method under impact noise background
  • Monostatic MIMO radar DOA estimation method under impact noise background
  • Monostatic MIMO radar DOA estimation method under impact noise background

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[0075] The present invention will be further described below in conjunction with the accompanying drawings. The software environment used in the present invention is Matlab R2017a version, and the hardware computing environment used is an Intel Corel i7 processor with a main frequency of 2.4GHz and a memory of 8GHz. In the simulation, M = 5 transmitting antennas and N = 6 receiving antennas in the single-static MIMO radar. Both the transmitting and receiving antennas are uniform linear arrays with an element spacing of half a wavelength. The variation range of the steady-state distribution α is 0 Figure 8 Shown, the inventive method step is as follows:

[0076] The first step is the schematic diagram of the impact noise under different characteristic exponents α based on the steady-state distribution of SαS and the error analysis of the Cauchy kernel DOA estimator. Such as Figure 1a ~ Figure 1d As shown, the impact noise has a larger magnitude than the Gaussian noise. And t...

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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.

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...

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Application Information

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IPC IPC(8): G01S3/14G01S7/41
CPCG01S3/14G01S7/414G01S7/418
Inventor 潘小义谢前朋陈吉源冯德军赵锋艾小锋顾赵宇宋鲲鹏肖顺平
Owner NAT UNIV OF DEFENSE TECH
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