High-speed sampling-based laser semi-active guides against high re-frequency interference

With the wide application of laser semi-active guided weapons, the research on jamming technology for laser guided weapons has become a hot spot of research at home and abroad day by day. Among them, laser high-frequency jamming has the advantages of simple implementation and good jamming effect, which makes it a very effective jamming method. Commonly used anti-high-frequency methods are coded wavegate technology, reverse suppression gate technology, are based on the pulse width spreading signal judgment, but in the interference frequency is high, the signal receiving system can not be completely stripped of the interference signal, and thus can not be effective anti-high-frequency interference.By analyzing the mechanism of laser high-frequency active interference, a high-speed sampling-based laser semi-active guide head anti-high-frequency interference method is now proposed, which uses a high-speed sampling chip to sample the characteristics of the measurement signal, combined with a feature recognition algorithm to identify the high-frequency interference to be rejected. After laboratory and outdoor verification, the method can effectively reject 200kHz highfrequency interference signal and achieve the purpose of precise guidance.