A Method for Adaptive Interference Suppression of Spaceborne Phased Array Antenna

Abstract

The present invention is a method for self-adaptive suppression of interference of a spaceborne phased array antenna. The spaceborne phased array antenna array is composed of N antenna feed sources, and the mode of combining the main antenna with the auxiliary antenna is adopted, wherein the main antenna and the auxiliary antenna have the same Directionality, can achieve global coverage. The implementation process of the present invention is: when interference occurs in the main lobe of the antenna, locate the interference, use the open-loop algorithm to calculate the zeroing weight, and use the beamforming network to generate a null at the interference; then use the closed-loop algorithm to zero the weight The value is continuously optimized. The invention solves the problems that the open-loop algorithm cannot be optimized in real time and the closed-loop self-adaptive zeroing algorithm has a long iteration cycle, and realizes fast and accurate adjustment of the phased array antenna.

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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