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Method for forming steady broadband beam based on frequency response invariability

A frequency response, wideband technology, applied in the field of signal anti-interference, can solve the problem of algorithm robustness to be improved

Inactive Publication Date: 2014-08-06
HARBIN ENG UNIV
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Problems solved by technology

On the other hand, the algorithmic robustness of existing methods also needs to be improved

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  • Method for forming steady broadband beam based on frequency response invariability
  • Method for forming steady broadband beam based on frequency response invariability
  • Method for forming steady broadband beam based on frequency response invariability

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[0037] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] The purpose of the embodiments of the present invention is to provide a robust broadband beamforming method based on frequency response invariance. Under the premise of maximizing the freedom of the array to improve the signal-to-interference-noise ratio of the output signal, the algorithm can form a deep null for strong interference or even fast-moving interference signals to meet the anti-interference requirements of broadband signal processing .

[0039] The embodiment of the present invention is implemented in this way, a robust broadband beamforming method based on an invariant frequency response, the robust broadband beamforming method based on an invariant frequency r...

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Abstract

The invention belongs to the technical field of signal interference resistance, and particularly relates to a method for forming a steady broadband beam based on frequency response invariability. The method comprises the steps that an overall broadband signal frequency band is divided into L sub bands; a reference frequency is selected, an optimal weight vector with a nulling control feature is designed at the reference frequency point, and a reference beam pattern is obtained; a response variable is introduced and used for providing an invariable frequency response, and therefore all frequency points of a signal on the frequency band can have continuous and consistent array responses; a second-order cone programming method is used for designing low-side-lobe optimal weight vectors of other sub bands, and therefore beam patterns of other sub bands and the reference beam pattern can be the same in main lobe width and nulling control feature; the optimal weight vectors which are finally obtained through design are used for forming the steady broadband beam based on frequency response invariability. According to the method for forming the steady broadband beam based on frequency response invariability, the response variable is introduced, so that the array degree of freedom is higher, the calculation quantity is smaller, and the manifested anti-interference performance is better.

Description

technical field [0001] The invention belongs to the technical field of signal anti-interference, and in particular relates to a robust broadband beamforming method based on constant frequency response. Background technique [0002] Array signal processing has a wide range of applications in sonar, radar, wireless communication and other fields, and broadband beamforming is a very important task of array signal processing. In recent years, broadband adaptive beamforming has also become an important development direction of broadband beamforming due to its special advantages in interference signal suppression. [0003] In broadband adaptive beamforming, the usual array system is designed to form beams for a single frequency signal. Only when the target signal is located in the direction of the beam, can it be ensured that the target signals of different frequencies pass through the array system. Signal distortion occurs (power spectrum remains unchanged). This distortion has...

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/2813
Inventor 周广涛李佳璇刘晓旭林萌萌郭萌孙梦陈俊博梁美美杨建通白红美
Owner HARBIN ENG UNIV
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