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Main lobe interference resisting method for airborne radar

A main lobe interference and airborne radar technology, which is applied in special data processing applications, complex mathematical operations, instruments, etc., can solve problems such as limited main lobe interference suppression, achieve the effect of improving convergence speed and ensuring correct directivity

Active Publication Date: 2021-06-11
AIR FORCE UNIV PLA
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Problems solved by technology

However, with the upgrading of the level of electronic countermeasures, the difference between the target and the interference presents a subtle characteristic, and the suppression of the main lobe interference only through polarization domain filtering is limited

Method used

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  • Main lobe interference resisting method for airborne radar
  • Main lobe interference resisting method for airborne radar
  • Main lobe interference resisting method for airborne radar

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and specific examples.

[0025] A method of airborne radar anti-critical interference, including the following key steps:

[0026] (1) Polarization domain of the polarized matrix - the derivation of airspace joint guide vector expression

[0027] 1. Polarized array structure: figure 1 As shown, each of the group elements consists of two orthogonal electrocouples, assuming that the electromagnetic wave is a fully polarized wave, indicated by the polarization phase description sub-(γ, η), where γ ∈ [0, π / 2] , Η∈ [0,2π]. The transmission polarization vector is placed in the Xoz plane, the number of array metallographs M × N, the horizontal direction, and the vertical direction of the vertical direction is D. x And D z Each of the group elements is the same as the same component and the position is accurate, the polarization characteristics ar...

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Abstract

The invention discloses a main lobe interference resisting method for an airborne radar. The method comprises the following steps: establishing a polarization area array structure and a receiving signal model based on main / auxiliary array cancellation, constructing an APC iterative algorithm model, and calculating an optimal weight vector of an auxiliary channel. A variance reduction method is introduced based on a stochastic gradient descent principle, gradient correction is performed through inner and outer loop iteration modes to reduce the variance of stochastic gradient estimation, an optimal weight vector of a space domain is calculated, an equivalent weight vector is introduced to measure a beam forming effect,an algorithm is optimized by the combination of a polarization domain and a spatial domain, and the method has good main beam pointing and anti-interference capabilities under the condition of main lobe interference, realizes effective suppression of main lobe interference, ensures correct directivity of beam forming, beam conformal capability and adaptive zeroing capability of side lobe interference, improves convergence speed, has the characteristic of excellent performance, and is suitable for popularization and application.

Description

Technical field [0001] The present invention belongs to the field of radar signal processing, involving a method of airborne radar anti-crowd interference, in particular, involving an adaptive polarization on elimination-machine learning joint optimized airborne radar anti-crucing interference method . Background technique [0002] Airborne radar is the core sensor of remote warning and air command operation. The electronics war in the modern information war is increasingly fierce, and the increasing progress of radar interference technology is the continuous improvement of radar anti-interference technology. The high and low anti-interference ability is directly determined radar. Whether the power can be played. The spatial radiation and energy distribution characteristics of the airborne warning radar are closely related to the antenna of the radar. By using ultra-low sidewall antennas, beam width control, the antenna coverage and the scan control, the side lobe is hidden, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/16G01S7/02G01S7/292G06F111/06
CPCG06F30/20G06F17/16G01S7/021G01S7/292G06F2111/06Y02D30/70
Inventor 彭芳吴军向建军许蕴山王帅王俊迪朱维锋
Owner AIR FORCE UNIV PLA
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