Adaptive interference suppression method for spaceborne phased-array antenna

Abstract

The invention relates to an adaptive interference suppression method for a spaceborne phased-array antenna. A spaceborne phased-array antenna array consists of N antenna feeding sources in a manner that a main antenna is combined with an auxiliary antenna, wherein the main antenna and the auxiliary antenna have the same directionality, and both the main antenna and the auxiliary antenna can realize global coverage. The method comprises the steps: when a main lobe of the antenna is subjected to interference, positioning the interference, calculating a zeroing weight by using an open-loop algorithm, and generating a null at the interference by using a beam forming network; then, continuously optimizing the zeroing weight by a closed-loop algorithm. The adaptive interference suppression method has the advantages that the problems that the open-loop algorithm can not carry out real-time optimization and the iteration cycle of the closed-loop adaptive zeroing algorithm is long are solved, and the fast and accurate adjustment on the phased-array antenna is realized.

Description

technical field [0001] The invention relates to a method for adaptively suppressing interference of a space-borne phased array antenna, which can be widely used in phased-array antennas and space-borne zeroing antenna systems, and belongs to the technical field of electronic anti-interference. Background technique [0002] At present, there are many anti-jamming methods for phased array antennas. When the jamming incident comes from the main lobe, the beam null point can be formed in the jamming direction by adjusting the weight of the antenna feed. [0003] While the traditional beamforming technology produces a zero point in the interference direction, it will produce two serious defects at the same time: one is the increase of the side lobe level, and the other is the serious deformation of the main lobe. Of course, the closed-loop iterative adaptive algorithm can be used to optimize the beamforming weights to overcome the above defects through continuous iteration, but a...

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Problems solved by technology

[0003] While the traditional beamforming technology produces a zero point in the interference direction, it will produce two serious defects at the same time: one is the increase of the side lobe level, and the other is the serious deformation of the main lobe

While this algorithm provides better zero-point convergence, it also greatly increases the complexity of the hardware, and the system uses a closed-loop convergence algorithm, and does not use an open-loop algorithm to provide the initial value of the zeroing weight, so a certain number of iterations is required , unable to respond quickly and in real time to disturbances

[0008] None of the above background technologies adopts the method of calculating the initial value of the zeroing weight by the open-loop algorithm, and using the closed-loop iterative algorithm to optimize the adaptive zeroing weight

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