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Broadband two-dimensional reconfigurable digital beam forming method

A digital beam and broadband technology, which is applied in the field of broadband two-dimensional reconfigurable digital beam forming, can solve the problems such as the inability to accurately measure the pitch angle of arrival of a single pulse signal, and the inability to accurately measure the pitch angle of arrival of the signal.

Pending Publication Date: 2021-11-23
中国船舶重工集团公司第七二三研究所
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Problems solved by technology

[0003] With the in-depth application of digital beamforming technology in the field of electronic reconnaissance, the traditional one-dimensional arrangement of beams, combined with the method of front electronic scanning for airspace coverage, has gradually exposed the following problems: since the one-dimensional arrangement has only one Layer beams, unable to accurately measure the signal pitch angle of arrival
It is impossible to measure the elevation angle of arrival of a single pulse signal in real time and accurately, which has become a major factor restricting the improvement of the direction finding accuracy of the system

Method used

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  • Broadband two-dimensional reconfigurable digital beam forming method
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Embodiment

[0034] A broadband two-dimensional reconfigurable digital beamforming method, the specific steps are:

[0035] Step 1: Construct a two-dimensional planar phased array antenna composed of 512 array elements, which is composed of 32 sub-arrays in azimuth, and the signal of each sub-array is obtained by simulating and synthesizing 16 array elements in elevation. The pitch pointing of each sub-array is controlled by the phase shifter inside the TR component of each array element.

[0036] Step 2: The equipment control unit issues control commands to the phased array and the beamforming unit, and divides the array into J 1 / J arrays according to the control commands sent by the main controller, and performs beamforming and wave position arrangement respectively. Cloth, N is a multiple of J.

[0037] The two-dimensional planar phased array is divided into left and right half-arrays, each half-array is composed of 16 sub-arrays, and the pitch points of the two half-arrays are control...

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Abstract

The invention discloses a broadband two-dimensional reconfigurable digital beam forming method. According to the method, beams which are originally arranged in a one-dimensional mode in the space are expanded to be arranged in a two-dimensional mode, beam pointing can be reconstructed in real time, and therefore real-time accurate measurement of the arrival angle of the monopulse signal is achieved; therefore, phased array plane is divided into a plurality of sub-arrays according to requirements for beam forming, and the beam pointing is reasonably set, so that the azimuth and pitching dimensions are covered by a plurality of beams, and the real-time accurate measurement of the angle of arrival of a single pulse signal is conveniently realized.

Description

technical field [0001] The invention belongs to digital beam forming technology, in particular to a broadband two-dimensional reconfigurable digital beam forming method. Background technique [0002] Digital Beam Forming (Digital Beam Forming, DBF) is a new technology in the field of radar and electronic warfare established after introducing digital signal processing methods on the basis of analog beam forming principles. For the inter-channel phase difference caused by the electromagnetic wave propagation path difference caused by the different antenna units in different spatial positions, the traditional analog beamforming process is to phase-shift and analogize the signals of each array element on the intermediate frequency carrier or radio frequency carrier, while the digital Beamforming is to digitalize the signal output by the array antenna through AD sampling, and then use the digital beamformer to carry out complex weighting to compensate the phase difference between...

Claims

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Application Information

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IPC IPC(8): H04B7/06H01Q21/06
CPCH04B7/0617H01Q21/061Y02D30/70
Inventor 朱业腾张生凤王玉斐赵鑫于勇
Owner 中国船舶重工集团公司第七二三研究所
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