| Citation: | HAO Xinhong, DU Hanyu, CHEN Qileet al. Rough surface target and jamming signal recognition of FM fuze[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(10): 1946-1955. doi: 10.13700/j.bh.1001-5965.2019.0036(in Chinese)
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A rough surface target and jamming signal recognition method for the ground frequency modulation (FM) fuze is proposed in order to effectively identify the ground target echo signal of the FM fuze and the digital radio frequency memory (DRFM) transmissive jamming. A rough surface beat frequency signal model of the ground FM fuze is established, and a two-dimensional distance-speed extraction method is used to extract the beat frequency and Doppler frequency. The beat frequency peak bandwidth and the Doppler peak bandwidth are used to identify ground target and the DRFM transmissive jamming, and their utility is verified by Monte Carlo simulation and non-parametric hypothesis statistical test. The results show that the spread of the beat frequency peak bandwidth and the Doppler frequency peak bandwidth is positively correlated with the size of the rough surface under the illumination of the fuze antenna. The Doppler frequency peak bandwidth spread is proportional to the carrier frequency. The peak bandwidth characteristics can be used to distinguish between rough surface target echo and DRFM transmissive jamming.
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