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Large scale phased array difference beam forming system based on sub-array division

A technology of sub-array division and difference beam, which is applied in the direction of radio wave measurement systems and instruments, can solve the problems of large difference beam difference beam error, degradation of single pulse tracking performance, and inability to divide in special rules, so as to achieve less resource consumption and avoid The performance of monopulse tracking deteriorates and the effect of easy engineering realization

Active Publication Date: 2018-05-18
10TH RES INST OF CETC
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Problems solved by technology

Since the division of sub-arrays cannot be particularly regular, the established coordinate axes may pass through some sub-arrays, which makes this sub-array-based implementation and the array-based division method quite different, and the obtained difference beam zero-depth size and The error between the position and the difference beam realized by the element-level division becomes larger, which also leads to the degradation of the monopulse tracking performance of the system

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  • Large scale phased array difference beam forming system based on sub-array division
  • Large scale phased array difference beam forming system based on sub-array division

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Embodiment Construction

[0015] refer to figure 1 and figure 2 . In the embodiment described below, a large-scale phased array differential beamforming system based on sub-array division includes: dividing into M sub-arrays, each sub-array contains N array elements, and a total of N×M antenna array elements N×M antenna array elements correspond to the serial radio frequency processing module, digital preprocessing module, beamforming module 1 within the primary sub-array and the cross-regional split processing weighted synthesis module 4 of the secondary differential beam sub-array, wherein each The beamforming module 1 in the primary sub-array is composed of the array element amplitude phase weighting unit 2 connected in series with the sub-array and the beam-forming unit 3; the secondary difference beam sub-array cross-region splitting process weighting and combining module 4 includes the weighting and combining module 4 with each sub-array and the beam-forming unit 3 connected azimuth dimension ...

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Abstract

The invention provides a large scale phased array difference beam forming system based on sub-array division, and aims to provide a difference beam forming device that can approach to the performanceof array element level difference beams and mono-pulse tracking precision. The system comprises N*M serially connected radio frequency processing modules corresponding to antenna array elements, a digital pretreatment module, a primary sub-array inner beam forming module, and a secondary difference beam sub-array cross-regional splitting and weighting-synthesizing module. The system comprises a designed azimuth dimension and pitching dimension sub-array cross-regional splitting unit and following cascaded units: a sub-array symmetrical positive azimuth difference beam weighting processing unit, a sub-array symmetrical negative azimuth difference beam weighting processing unit, a sub-array symmetrical positive pitching difference beam weighting processing unit, a sub-array symmetrical negative pitching difference beam weighting processing unit, and an azimuth difference and azimuth difference beam synthesizing unit. An add-subtract treatment is carried out in an azimuth-pitching coordinate area division symmetrical negation mode to obtain the azimuth difference and pitching difference beams.

Description

technical field [0001] The invention relates to a large-scale phased array difference beamforming method based on sub-array division. Background technique [0002] With the rapid development of modern signal processing and VLSI technology, phased array antenna technology has also made great progress. In order to obtain a longer operating distance and sufficient spatial resolution capabilities, array antennas are developing towards large-scale, almost Antennas with hundreds, thousands or even tens of thousands of elements are not uncommon. Subarray-level adaptive beamforming is often used for large array antennas. If the beamforming method is applied at the element level in such a large array, the received signal of each antenna element must be processed separately, that is, each element forms a receiving channel. Because each receiving channel must include several times of amplification, mixing, and finally video processing or analog-to-digital A / D conversion. It is conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02G01S7/28G01S7/36
CPCG01S7/023G01S7/2813G01S7/36
Inventor 冯林高赵卫东曾富华徐茂格
Owner 10TH RES INST OF CETC
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