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Estimation method for magnitudes and phases of radar uniform linear array

A uniform linear array, amplitude and phase perturbation technology, applied in the field of radar array signal processing, can solve the problems of deviation of estimation results and low signal-to-noise ratio

Inactive Publication Date: 2014-10-01
XIDIAN UNIV
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Problems solved by technology

However, when the snapshot data is limited and the signal-to-noise ratio is low, the estimation results will have some deviations

Method used

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  • Estimation method for magnitudes and phases of radar uniform linear array
  • Estimation method for magnitudes and phases of radar uniform linear array
  • Estimation method for magnitudes and phases of radar uniform linear array

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Embodiment Construction

[0063] refer to figure 1 , illustrating a method for estimating the magnitude and phase of a radar uniform linear array of the present invention, its specific implementation steps are as follows:

[0064] Step 1. The radar antenna array is set to be a uniform linear array (Uniform Linear Array, ULA) with M array elements, and there is no error in the amplitude and phase of the first g array elements.

[0065] Set up the experimental platform through step 1.

[0066] Step 2, determine the steering vector L of the uniform linear array and the magnitude and phase disturbance vector Γ of the uniform linear array; pre-estimate the magnitude and phase disturbance vector Γ of the uniform linear array, and obtain the magnitude and phase disturbance pre-estimation vector Γ' of the uniform linear array; Use the pre-estimated vector Γ' and the steering vector L of the uniform linear array to construct the array flow pattern D of the uniform linear array, that is, D=diag(Γ') L, diag(.) m...

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Abstract

The invention discloses an estimation method for the magnitudes and phases of a radar uniform linear array, and relates to the field of array signal processing. The method comprises the steps that (1) the radar antenna array is set to be provided with M array elements, wherein errors do not exist in the magnitudes and phases of the first g array elements; (2) pre-estimated values of the magnitudes and phases are used as disturbance initial values of the magnitudes and phases of the uniform linear array, and an array flow pattern of the uniform linear array is built through the disturbance initial values of the magnitudes and phases; (3) a subspace of a measurement matrix is constructed; (4) a target sparse matrix is solved through the array flow pattern and the subspace of the measurement matrix; (5) the array flow pattern is optimized through the array flow pattern, the subspace of the measurement matrix and the target sparse matrix; (6) the estimated magnitude value and the estimated phase value of the uniform linear array are obtained through matrix diagonal elements of the optimized array flow pattern. According to the estimation method for the magnitudes and phases of the radar uniform linear array, the magnitudes and phases of the uniform linear array are effectively estimated under the situation of a low signal-to-noise ratio and a small number of snapshots.

Description

technical field [0001] The invention belongs to the field of radar array signal processing and relates to a method for estimating the amplitude and phase of a uniform linear array of radar. Background technique [0002] Array signal processing is an important research branch of modern signal processing. However, in practical engineering applications, due to various unavoidable errors, the actual array flow pattern often has a certain degree of deviation or disturbance, so that the calculation performance of high-resolution spectral estimation will be seriously deteriorated, so the error estimation of the array is It is one of the very important research directions in array signal processing. [0003] Due to the influence of various disturbances and errors, when the actual model does not match the hypothetical model, the performance of many spectral estimation based on the ideal model will be seriously degraded, so compensation or array error calibration must be taken. In p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/40
Inventor 陈伯孝杨明磊朱芳芳雷文英
Owner XIDIAN UNIV
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