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Low-side-lobe beam pattern integrated design method based on convex optimization

A comprehensive design and low sidelobe technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as poor robustness, large side effects of paired gain, and high sidelobe values

Active Publication Date: 2017-05-17
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-sidelobe beam pattern comprehensive design method based on convex optimization, which solves the problems of high sidelobe value, poor robustness, and large side effects of pair gain in the existing response beam design method

Method used

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  • Low-side-lobe beam pattern integrated design method based on convex optimization
  • Low-side-lobe beam pattern integrated design method based on convex optimization
  • Low-side-lobe beam pattern integrated design method based on convex optimization

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Embodiment

[0129] The experiment of the present invention is a uniform linear array of 10 array elements, and the array element spacing is frequency f 0 Corresponding half-wavelength; Adopt the design of the present invention to be corresponding to frequency f=f 0 / 2, point to θ 0 = The side lobe control beam pattern in the 0° direction, the side lobe area is [-90°, -15°]∪[15°, 90°], the beam side lobe level is set to -30dB, through the formula (6)-( The calculation iteration of 23) can obtain the weight vector w; the beam pattern calculated by this, such as figure 2 As shown, the designed beam achieves the required side lobe control beam.

[0130] In the present invention, by optimizing the beam side lobes, the robustness of the beamformer is good in the process, the side lobe control has low side effects on the pair gain, and the obtained side lobe value is low, the method is simple, the operation is simple, and there is a good effect. Practical value.

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Abstract

The invention discloses a low-side-lobe beam pattern integrated design method based on convex optimization. Auxiliary variables are introduced to achieve variable separation by adopting an alternative direction multiplier method (ADMM), a large amount of original inequality constraint limits are converted into solvable problems, iteration solution is performed by applying an ADMM thought, and accordingly parameters are determined to obtain an ideal wave beam, namely side-lobe values are reduced. The robustness of a wave beam forming device is good in the process by optimizing wave beam side lobes, the side effect of the side lobes on array gains is low, the obtained side lobe values are low, and the low-side-lobe beam pattern integrated design method is simple and simple in operation and has a very good practical value.

Description

technical field [0001] The invention belongs to the field of array signal processing, and in particular relates to a method for comprehensively designing low sidelobe beam patterns based on convex optimization. Background technique [0002] In signal processing problems, beam pattern optimization design includes two aspects of research content, one is to control the beam side lobe, and the other is to design the beam main lobe response. In recent years, more and more people pay more and more attention to the design problems of these two aspects. This kind of design problem is called the beam pattern synthesis problem, which is mainly the problem of expected response beam design. [0003] For sidelobe steering beam design, the formation and noise field are generally fixed, and the sidelobes of conventional beamformers are fixed. When it is applied to certain shapes of arrays, the sidelobes may be relatively high. As for the actual matrix system, since a single sensor may no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 梁军利于国阳范文
Owner NORTHWESTERN POLYTECHNICAL UNIV
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