Space-based radar electromagnetic spectrum environment cognition system and anti-interference method

Abstract

The invention discloses a space-based radar electromagnetic spectrum environment cognition system and an anti-interference method. According to the method, the space-based radar electromagnetic spectrum environment cognition system is constructed on the basis of a space-based radar, fast beam scanning is performed on a task region continuously by multiple times through the space-based radar electromagnetic spectrum environment cognition system, signals outside a radar signal band range are intercepted from multiple collected signals for spectral analysis, the characteristics of pure interference signals are extracted, and band information of all the interference signals is acquired quickly; and information of the direction of arrival is estimated according to the change of each interference normalization power along with a beam scanning angle, electromagnetic spectrum environment perception prior information is obtained and fed back to the radar system in real time, and consequently the space-based radar system has an anti-interference ability and still maintains a target detection tracking ability even in a complicated electromagnetic environment. Through the method, the characteristics of the pure interference signals can be extracted rapidly, the direction of arrival of interference is estimated, interference information is fed back to the radar system in real time, and theanti-interference function of the system is achieved.

Description

technical field [0001] The invention relates to a space-based radar electromagnetic spectrum environment cognition system and an interference countermeasure method, belonging to the technical field of space-based radar anti-jamming. Background technique [0002] The orbit of space-based radar is known, so relevant parameters such as radar frequency and waveform are easily detected by enemy reconnaissance equipment, and electronic attacks are used to implement targeted electromagnetic interference on space-based radar. At present, in ground combat, electronic warfare (spectrum warfare) has become the fifth-dimensional combat space following the four-dimensional combat space of latitude, longitude, altitude, and time. Both enemy fighters and surface ships are equipped with special electronic warfare equipment. Capable of electronic warfare. Therefore, space-based radar must have the ability to quickly and real-time monitor the electromagnetic environment information within th...

Images