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An Angle Estimation Method for Polarimetric Mimo Radar Based on Block Sparse

An angle estimation, block sparse technology, applied in the field of radar, can solve the problems of small amount of calculation and serious mutual coupling of polarized MIMO radar, and achieve the effect of small amount of calculation

Active Publication Date: 2021-10-19
AIR FORCE UNIV PLA
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and propose a method for estimating the angle of polarized MIMO radar based on block sparseness. This algorithm can solve the problem of serious mutual coupling in traditional polarized MIMO radar. The dictionary completes the estimation of three-dimensional parameters, with a small amount of calculation, and at the same time, it can realize the automatic pairing of three-dimensional parameter estimates, and has good performance

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  • An Angle Estimation Method for Polarimetric Mimo Radar Based on Block Sparse
  • An Angle Estimation Method for Polarimetric Mimo Radar Based on Block Sparse
  • An Angle Estimation Method for Polarimetric Mimo Radar Based on Block Sparse

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Embodiment Construction

[0027] refer to figure 1 , shows a flow chart 100 of the angle estimation method based on the block-sparse polarized MIMO radar of the present invention, and the specific steps are as follows:

[0028] Step 101, according to the received data x(t) of the polarization MIMO radar, use the maximum likelihood algorithm to calculate the covariance matrix R of the received data x(t) xx .

[0029] The present invention is aimed at the separated polarization MIMO radar, which is composed of: the electric dipoles Ex and Ey are respectively placed along the x-axis direction and the y-axis direction, the two are perpendicular to each other, the center of Ex is the coordinate origin O, and the target T The azimuth and elevation angles are φ and θ respectively, where φ∈[0,2π), θ∈[0,π], and the auxiliary polarization angle Polarization phase difference η∈[-π,π), dipole spacing D d . In the OT direction, the array element response of the classical co-point crossed dipole is:

[0030] ...

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Abstract

The invention discloses an angle estimation method of a polarization MIMO radar based on block sparseness, which mainly solves the target positioning and tracking problems of the polarization MIMO radar. The implementation scheme is as follows: 1) According to the received data x(t) of the polarization MIMO radar, calculate the covariance matrix R of x(t) xx ; 2) For the covariance matrix R xx Perform vectorization operations, ie vec(R xx ); 3) Divide the dictionary interval according to the angle range [0 °, 180 °] of the target, and construct it in an over-complete dictionary matrix D(Θ) with a sparse structure; 4) For the covariance matrix R xx Carry out eigenvalue decomposition to obtain the smallest eigenvalue, which is the estimated value of the noise power, and then obtain the estimated value I of the noise n as the unit matrix; 5) Construct the sparse recovery equation according to the overcomplete dictionary and the noise item, and use the BOMP algorithm to obtain The support position P and its amplitude 6) According to the calculation of P and the angle value and polarization parameter value of K targets, this invention solves the problem of serious mutual coupling in traditional polarization MIMO, and the calculation amount is small, and at the same time realizes the automatic matching of parameter estimation values , with good performance.

Description

technical field [0001] The invention belongs to the field of radar technology, and relates to radar angle-of-arrival estimation, in particular to an angle estimation method based on block-sparse polarization MIMO (Multiple-Input Multiple-Output, multiple-input multiple-output) radar, which can be used for target positioning with tracking. Background technique [0002] Since the polarization MIMO radar has both polarization diversity and MIMO radar waveform diversity, it can effectively reduce the echo signal loss caused by the single polarization waveform, so as to obtain more target information through the diversification of the polarization domain, especially for the target Due to the fluctuation of RCS (Radar-Cross Section, radar cross-sectional area) and clutter interference, it can improve the detection ability and estimation accuracy to a certain extent. At the same time, the use of polarization characteristics also enables the radar system to resist various The abili...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S7/42
CPCG01S7/41G01S7/42
Inventor 张秦郑桂妹陶建锋张栋李槟槟
Owner AIR FORCE UNIV PLA