Ultra-low side lobe adaptive digital beam forming (ADBF) method for digital array

A digital array and digital beam technology, applied in the field of ultra-low sidelobe adaptive digital beamforming, can solve problems such as the inability to effectively control the adaptive beam sidelobe level, and achieve improved sidelobe performance, less computation, and faster convergence. Effect
CN102608580AInactive Publication Date: 2012-07-25HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HOHAI UNIV
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ultra-low side lobe adaptive digital beam forming (ADBF) method for a digital array. The method comprises four steps of conventional formation of a sum beam, interference airspace direction finding of a beam domain, construction of interference auxiliary beams and calculation of an adaptive weight; and specifically, the ADBF weight is calculated in a beam domain dimension reduction space for the auxiliary beams in the interference direction by using a digital array adaptive design. A theoretical analysis and a simulation result show that the algorithm adaptively inhibits interference, has good ultra-low side lobe beam shape preserving performance and is high in convergence rate, low in calculation quantity and suitable for the engineering application.
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Description

technical field

[0001] The invention relates to an ultra-low side lobe adaptive digital beam forming method in the field of digital array beam forming. Background technique

[0002] Digital arrays have been widely used in radar, communication and other fields. Aiming at the increasingly complex electromagnetic environment, the new generation of radar and communication systems is based on digital arrays to further study Adaptive Digital Beamforming (ADBF) technology at the receiving end to suppress various active interferences. As an application of adaptive filtering in array signal processing, the research on ADBF technology has been carried out for more than 30 years. Its core idea is to realize adaptive zeroing of interference under the conformity of the antenna main beam. The previous research work was mainly based on array-level signals, and the subsequent research on sub-array-level ADBF technology for large-scale phased array systems [1-6] .

[0003] ADBF is an effe...

Claims

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