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Sharpened broadband beam forming method and device based on two-stage delay

A beam sharpening technology, applied in the field of signal processing, can solve problems such as low beam resolution and inability to suppress beam sidelobe interference, and achieve the effects of improving measurement accuracy, increasing signal processing speed, and suppressing sidelobe interference

Inactive Publication Date: 2021-04-30
北京星天科技有限公司
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Problems solved by technology

[0004] The purpose of the embodiment of the present application is to provide a sharpened broadband beamforming method and device based on two-stage delay to solve the problem that conventional beamforming methods cannot suppress beam sidelobe interference and result in low beam resolution

Method used

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  • Sharpened broadband beam forming method and device based on two-stage delay
  • Sharpened broadband beam forming method and device based on two-stage delay
  • Sharpened broadband beam forming method and device based on two-stage delay

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Embodiment Construction

[0034] Embodiments of the present application provide a two-stage delay-based sharpening broadband beamforming method and device to solve the problem that conventional beamforming methods cannot suppress beam sidelobe interference and result in low beam resolution.

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0036] figure 1 is a schematic flowchart of a two-stage delay-based sha...

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Abstract

The embodiment of the invention discloses a sharpened broadband beam forming method and device based on two-stage delay, which are used for solving the problem of low beam resolution caused by incapability of suppressing beam sidelobe interference in a conventional beam forming mode. The method comprises the following steps: carrying out orthogonal transformation on an original signal received by a transducer array element to obtain an IQ signal corresponding to the original signal, wherein the transducer array element comprises a plurality of array element channels; dividing the transducer array element into a plurality of sub-arrays which are not overlapped in space, and determining sub-array IQ signals corresponding to the sub-arrays respectively; performing inter-array delay processing on the sub-array IQ signals corresponding to the sub-arrays respectively to obtain sub-array delay IQ signals corresponding to the sub-arrays respectively; and performing beam sharpening processing on each sub-array delay IQ signal to obtain a target high-resolution beam corresponding to the original signal. According to the technical scheme, sidelobe interference of broadband beams can be suppressed, and the measurement precision of the broadband multi-beam sounding system is improved.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a two-stage delay-based sharpening broadband beamforming method and device. Background technique [0002] With the development of modern new technologies, broadband digital multi-beam sounding systems can obtain higher spatial gain and spatial resolution, and can meet higher detection accuracy and different sounding ranges, becoming the mainstream of multi-beam sounding systems. [0003] Wideband digital multi-beam sounding systems mostly use wideband array signals. If the conventional narrowband beamforming method is used to process the signal, it will be affected by the aperture transition effect, which will lead to beam pointing deviation, while the broadband beamforming with digital delay Although this method can completely eliminate the aperture transition effect, it cannot avoid the problems of widening the main lobe of the beam and increasing the side lob...

Claims

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Application Information

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IPC IPC(8): G01S7/52
CPCG01S7/52003
Inventor 李春雨邬松
Owner 北京星天科技有限公司
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