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Scattering point model estimation method based on target echo intensity sorting

A technology of target echo and echo model, which is applied to radio wave measurement systems, instruments, etc.

Active Publication Date: 2021-01-22
WUHAN BINHU ELECTRONICS
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Problems solved by technology

Secondly, due to the large number of primary singular value screenings, the reconstructed matrix bundle contains some noise components, and there are some useless elements in the solved model parameter set

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  • Scattering point model estimation method based on target echo intensity sorting
  • Scattering point model estimation method based on target echo intensity sorting
  • Scattering point model estimation method based on target echo intensity sorting

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] The invention provides a matrix beam method based on "coefficient truncation" for estimating the parameters of the target scattering point echo model and improving the accuracy of the estimating model.

[0035] Such as figure 1 As shown, the parameter estimation steps of the target scattering point echo all-pole model in the present invention include: constructing a Hankel matrix and decomposing its singular value, intercepting the singular value and unitary matrix and reconstructing the Hankel matrix, calculating the generalized eigenvalue of the matrix bundle, calculating and combining Intercept the model coefficients, filter the generalized eigenvalues ​​to re-estimate the model coefficients, and construct the scattering point echo model.

[0036] Coefficient truncation: According to the relative echo intensity of each scattering poi...

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Abstract

The invention relates to the field of target scattering point echo model estimation, in particular to a scattering point model parameter estimation method based on target echo intensity sorting. According to the method, more original signal data are used for participating in model pole estimation, descending sorting is carried out on the calculated model coefficients, a plurality of previous larger coefficient values are intercepted according to the calculated model order, and finally, a target scattering point echo model is established, so that the extrapolation data accuracy is higher.

Description

technical field [0001] The invention relates to the field of target echo model estimation of scattering points, in particular to a method for estimating parameters of scattering point models based on the ordering of target echo intensities. Background technique [0002] Estimation of attenuation exponent and model parameters is an important link in the field of UWB radar imaging. The traditional method is to equate the attenuation exponent and the model to an all-pole model first, and then combine root-MUSIC and least squares algorithm to estimate the model parameters. Due to the attenuation term in the model, all the obtained poles will deviate from the unit circle to varying degrees, so the algorithm is less robust in the case of low signal-to-noise ratio. Based on the all-pole model, it can be regarded as the superposition process of harmonics. Follow-up research has proposed a matrix beam algorithm based on "singular value truncation" to estimate model parameters. Solv...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 李翔张建明宋慧厉芸
Owner WUHAN BINHU ELECTRONICS
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