A Beam Broadening and Sidelobe Suppression Method Based on Sparse Constraints

A sparse constraint and beam broadening technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of performance degradation, long distance, poor robustness, etc., and achieve enhanced suppression ability and low sidelobe level Effect

Inactive Publication Date: 2017-10-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, there are often major defects in the current methods, such as the results are far from the real situation; the performance drops seriously when the signal-to-noise ratio is high; It is wider, and has higher requirements for the prediction of the direction of arrival and the width of the main lobe, etc.

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  • A Beam Broadening and Sidelobe Suppression Method Based on Sparse Constraints
  • A Beam Broadening and Sidelobe Suppression Method Based on Sparse Constraints
  • A Beam Broadening and Sidelobe Suppression Method Based on Sparse Constraints

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Embodiment Construction

[0027] In this implementation manner, a uniform linear antenna array with 32 elements and a half-wavelength interval is taken as an example, and only narrowband signal source scenarios are considered.

[0028] First of all, we can assume that the element factors of all azimuth angles are the same and initialize the base range to determine the position of the first quadrant. Then set the center frequency fc to 9.5e9Hz. Set the beam main lobe and side lobe constraint parameters again. The sampling interval of the main lobe area is 0.1°, and the sampling interval of the side lobe area is 1°. The parameters of the main lobe and side lobe area are set as shown in step 1-2.

[0029] Step 1, parameter setting:

[0030] Step 1-1, set the parameters γ, λ, p of the steering vector according to the given array structure (in order to obtain the sparse beam we require that the p value is less than 2, the value of the parameter λ can be set to 0.2 according to experience in this embodiment...

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Abstract

The invention discloses a method for beam broadening and sidelobe suppression based on sparse constraints, which belongs to the field of antenna array signal processing for receiving wireless transmission signals, in particular, a beam broadening and sidelobe suppression method using sparse reconstruction to make the antenna array optimized method. While using the sparse constraint algorithm to realize beam broadening, a lower side lobe level can be obtained, thereby enhancing the ability to suppress interference signals. By establishing the antenna array model, determining the steering vector parameters, and then using the over-complete dictionary to represent the matrix of observation and interference direction information, and then initializing the weight vector of the beamformer, and performing sparse iteration on it, the weight vector that meets the conditions has been obtained , so that the output peak has a lower side lobe on the original basis. Compared with other algorithms, this algorithm achieves super-resolution while achieving a narrow main lobe, and improves stability while having a low side lobe.

Description

technical field [0001] The invention belongs to the field of antenna array signal processing for receiving wireless transmission signals, in particular to a method for realizing beam broadening and sidelobe suppression by using sparse reconstruction to optimize the antenna array. Background technique [0002] The array antenna is easy to realize narrow beam, low sidelobe and phased beam scanning, which improves the reliability, stability and real-time performance of finding and tracking targets. Therefore, the optimization of the antenna is particularly important in real life. The optimization of the array antenna mainly has two aspects: one is to optimize the directivity coefficient index to obtain the array excitation amplitude and phase with the maximum directivity coefficient; the other is to optimize the beamforming design, that is, to change the array excitation amplitude and / or phase to make the radiation pattern the specified beam shape. Among them, beam broadening...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 张瑛赵丹旎汪婷静陈垠江康宁赵华鹏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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