An anti-jamming method for ehf satellites based on aperiodic multi-stage array

Abstract

The invention relates to an EHF satellite anti-jamming method based on an aperiodic multi-level array, comprising: receiving satellite signals based on an array antenna to obtain a multi-level array satellite signal, dividing the multi-level array satellite into N sub-arrays, and obtaining a first-level A sub-array and a secondary sub-array, the first-level sub-array is composed of M array elements, and then the second-level sub-array is formed with the N sub-arrays as array elements; the aperiodic distribution of the second-level sub-array is calculated As a result, the coordinates of the center position of the sub-array are determined, and the evolutionary algorithm is executed according to the parameters entered in the configuration to find the optimal aperiodic distribution result of the sub-array. The non-periodic multi-stage array in the present invention improves the beam resolution, suppresses the generation of grating lobes at the same time, and effectively solves the uplink interference problem faced by satellite communication.

Description

technical field [0001] The invention relates to the technical field of satellite anti-jamming, in particular to an EHF satellite anti-jamming method based on an aperiodic multi-level array. Background technique [0002] The extremely high frequency (EHF) band satellite communication system has the characteristics of high frequency, wide frequency band and narrow beam. As the development direction of satellite communication in the future, it has been valued by various countries. In satellite system planning, anti-jamming capability is an important design index, especially in complex or confrontational scenarios. The interference to the satellite communication system can be divided into uplink interference and downlink interference. The uplink interference is mainly aimed at the satellite, and the downlink interference is mainly aimed at the terminal. [0003] In satellite communication, technologies such as spread spectrum and frequency hopping are often used to suppress int...

AI Technical Summary

Problems solved by technology

When the interference source is in or close to the beam coverage area, it may cause interference to the satellite, so the direction of the interference signal and the uplink signal arriving at the satellite terminal will be very close, which will cause conventional adaptive zeroing to suppress the interference while also causing damage to the uplink signal. Significant attenuation

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