Beam broadening algorithm based on inheritance quasi-global segmentation search

A beam broadening and inheritance technology, applied in the field of beam broadening algorithms based on inheritance quasi-global subsection search, can solve problems such as difficulty in converging to local extremes, unstable solution process, dependence on random quantities, etc., to ensure repeatability , the calculation efficiency is improved, and the effect of improving the optimization efficiency

Active Publication Date: 2020-02-18
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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  • Application Information

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Problems solved by technology

[0011] The purpose of this application is to: solve the demand for fast beam broadening in array antennas, solve the problems of traditional array antenna beamforming algorithms that rely too much on random or pseudo-random quantities, slow solution speed, and unstable solution process,

Method used

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  • Beam broadening algorithm based on inheritance quasi-global segmentation search
  • Beam broadening algorithm based on inheritance quasi-global segmentation search
  • Beam broadening algorithm based on inheritance quasi-global segmentation search

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Embodiment 1

[0042] Such as figure 1 As shown, this embodiment provides a beam broadening algorithm based on inherited quasi-global segmented search, which is suitable for determining the beam broadening in each group of pattern to be optimized in the array antenna. The beam broadening algorithm includes:

[0043] Step S1: Calculate the expansion ratio of the pattern to be optimized in the pattern to be optimized, and sort the pattern to be optimized according to the expansion ratio.

[0044] Specifically, set the expansion ratio to the ratio between the beam width of the pattern to be optimized and the standard (normal) beam width of the antenna, calculate the expansion ratio of each pattern to be optimized, and according to the size of the expansion ratio, from small to In a large order, sort all the directional patterns to be optimized in the group of directional patterns to be optimized.

[0045] Preferably, since errors will be introduced in the pattern to be optimized during scanning, the e...

Embodiment 2

[0087] This embodiment provides a radar imaging system. The radar imaging system is provided with an array antenna. The radar imaging system uses the beam broadening algorithm based on the inherited quasi-global segmented search as in any one of the above-mentioned embodiments to determine the signal transmitted by the array antenna The beam is broadened, and radar imaging is performed based on the received reflected signal.

[0088] Using the radar imaging system in this embodiment, on the one hand, it is possible to constrain the full-space radiation characteristics of the array antenna, and on the other hand, to optimize the radar imaging characteristics of the array antenna.

[0089] Moreover, because the beam broadening algorithm based on the inherited quasi-global segmented search in the first embodiment is adopted, it can also simplify the solution process of the array antenna broadening beam corresponding to the array element excitation, improve the optimization efficiency o...

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Abstract

The invention discloses a beam broadening algorithm based on inheritance quasi-global segmentation search, and the algorithm comprises the steps: S1, calculating the broadening multiple of a to-be-optimized directional diagram in a to-be-optimized directional diagram, and sorting the to-be-optimized directional diagram according to the broadening multiple; S2, calculating a ratio of broadening multiples between two adjacent to-be-optimized directional diagrams, inserting a virtual to-be-optimized directional diagram between the two adjacent to-be-optimized directional diagrams according to a preset target index when the ratio is judged to be greater than or equal to a constraint threshold, and recording the virtual to-be-optimized directional diagram as a revised to-be-optimized directional diagram; S3, calculating and revising universal amplitude distribution of the directional diagram group to be optimized according to the Taylor function; and S4, according to the phase excitation calculation formula, calculating and revising the phase excitation of the to-be-optimized directional diagram by adopting a sectional search algorithm. By means of the technical scheme, the optimizationefficiency of the directional diagram is improved, the calculation requirement for quick beam broadening in the array antenna is met, and the array antenna has the continuous beam characteristic.

Description

Technical field [0001] This application relates to the technical field of array antenna radar imaging, in particular, to a beam broadening algorithm based on inherited quasi-global segmented search. Background technique [0002] The fast beamforming algorithm is an important technology in the field of array antennas. Its main implementation methods can be divided into the following two categories: [0003] The first type is to obtain the amplitude and / or phase distribution of each radiating element through direct analytical calculation of the target pattern. For example, based on the far-field pattern analysis algorithm, through this algorithm, the amplitude and phase distribution of each radiating element in the array antenna can be obtained analytically. [0004] However, the application scenarios of this algorithm are more restrictive. Normally, the expanded pattern cannot be accurately described; and the amplitude and phase excitation based on Fast Fourier Transformation (FFT) a...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08
CPCH04B7/0617H04B7/088
Inventor 孙红兵虞舜华梁志伟汪智程岩余伟
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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