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A large-scale digital array null broadening adaptive beam forming method

An adaptive beam and digital array technology, applied in complex mathematical operations, etc., can solve problems such as large amount of calculations and poor robustness

Pending Publication Date: 2019-04-16
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to propose a large-scale digital array zero trap widening adaptive beamforming method to solve the problem of large-scale digital array full-array adaptive digital beamforming algorithm with a large amount of calculation and poor robustness against fast maneuvering interference

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  • A large-scale digital array null broadening adaptive beam forming method
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  • A large-scale digital array null broadening adaptive beam forming method

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Embodiment

[0137] The present invention adopts adaptive array theory, on the basis of sub-array dimension reduction adaptive beamforming, by adding random phase perturbation to array element data, to realize adaptive zero-slot widening to improve the anti-jamming stability of the algorithm against fast maneuvering jamming . The algorithm implementation model under the subarray dimensionality reduction architecture is as follows: figure 1 shown. This embodiment adopts a triangular grid array with 172 array elements, the array element spacing is 0.6λ, λ is the working wavelength, and the unit antenna is an omnidirectional antenna. The arrangement structure of the array is as follows figure 2 shown.

[0138] The realization of the efficient zero-slot widening adaptive beamforming method of this large-scale digital array under the triangular grid array of 172 array elements includes the following steps:

[0139] Step 1. Let the expected null-sag widening width W=0.05 in the unit of angle...

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Abstract

The invention provides a large-scale digital array null broadening adaptive beam forming method, which comprises the following steps of: firstly, constructing a phase disturbance weighting matrix according to an array structure and a required null width, and performing phase disturbance weighting on an array receiving data matrix; Secondly, constructing a subarray dimension reduction transformation matrix according to the static wave beam weight coefficient vector and the subarray division matrix, and performing subarray transformation processing on the output after the phase disturbance weighting to obtain a subarray output signal; And finally, performing noise power normalization on the subarray output according to subarray division and the static weight coefficient, performing conventional adaptive processing on the normalized output to obtain a subarray adaptive weight vector, and performing digital beam forming by using the weight vector to obtain an adaptive digital beam output.According to the method, the high-efficiency adaptive null broadening spatial domain interference resistance of the large-scale digital array aiming at the fast maneuvering interference source is realized, and the complexity of the algorithm is greatly reduced while the effectiveness and the stability of sidelobe interference suppression are ensured.

Description

technical field [0001] The invention belongs to the field of array antenna space adaptive anti-jamming, in particular to a large-scale digital array zero trap widening adaptive beam forming method. Background technique [0002] Adaptive digital beamforming technology can effectively suppress spatial interference and noise because it can adaptively form pattern nulls in the direction of spatial interference. It is a cutting-edge technology in the fields of modern radar, sonar and mobile communications. The nulls formed by conventional adaptive digital beamforming algorithms are very steep in the interference direction, and can only be effectively suppressed when the interference falls strictly on the null position. However, in practical applications, due to the continuous rotation of the system platform, the self-motion of the interference source or the non-stationary interference propagation path, the angle of the interference relative to the system platform will appear non-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/16
CPCG06F17/16
Inventor 马晓峰沈爱松盛卫星张仁李韩玉兵崔杰戴铭晖
Owner NANJING UNIV OF SCI & TECH
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