Overview on anti-jamming technology in main lobe of radar

With the improving development of the electronic and information technology and the complexity of the electromagnetic environment in the battlefield, the contest between the electronic jamming and the anti-interference is more and more fierce. The performance of anti-jamming of radar, which is kind of important sensor and data processer, has great meaning for its self-survival and battle performance. At the present stage, the imperious difficulty of anti-jamming of radar has been concentrated in the main lobe, as the anti-jamming in side-lobe has been beautifully restrained by sidelobe canceller and blanking. Combined with the typical scene of medium and short range air defense alerting, the method of anti-jamming in main-lobe is summarized in this paper from two sides: flexible anti-interference with single radar base and synergistic anti-interference with separated basis. The single one is introduced and analyzed from four dimensionality: time, frequency, space, polarization,then significance and the phase-coherent accumulation of the recombined-agility waveform across multi-dimension is emphasized. Besides, multi-based synergistic anti-interference is drawn forth from anti-blanket jamming and anti-deception jamming What’s more, combined with the thought of deep learning, cognition and distinguishing of interference is bring to anti-jamming system and the closed loop of anti-jamming processing is built.