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Volume 28 Issue 6
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2020  >  28(6): 677-684
JIANG Shuai, FAN Shu-hong, HAO Bao-an. Two-Torpedo Salvo Active Homing Method Based on Fractional Fourier Transform[J]. Journal of Unmanned Undersea Systems, 2020, 28(6): 677-684. doi: 10.11993/j.issn.2096-3920.2020.06.013
Citation: JIANG Shuai, FAN Shu-hong, HAO Bao-an. Two-Torpedo Salvo Active Homing Method Based on Fractional Fourier Transform[J]. Journal of Unmanned Undersea Systems, 2020, 28(6): 677-684. doi: 10.11993/j.issn.2096-3920.2020.06.013
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Two-Torpedo Salvo Active Homing Method Based on Fractional Fourier Transform

doi: 10.11993/j.issn.2096-3920.2020.06.013

  • The 705 Research Institute, China Shipbuilding Industry Corporation, Xi’an 710077, China

  • Received Date: 2020-07-31
  • Rev Recd Date: 2020-09-28
  • Publish Date: 2020-12-31
    Abstract
  • A two-torpedo salvo can effectively improve hit probability, but it may cause mutual interference problems. Therefore, a two-torpedo salvo active homing method based on fractional Fourier transform is proposed in this study. The echo signals of two torpedoes can be separated and detected by transmitting linear frequency modulation (LFM) signals at different chirp rates and by applying the focus characteristics of the fractional Fourier transform to those LFM signals. Accordingly, a general scheme for two-torpedo salvo target detection is proposed, and the main factors that affect the target parameter estimation results are further analyzed. Simulation results under different signal-to-noise ratios show that using fractional Fourier transform can effectively realize target detection of a two-torpedo salvo and has strong anti-interference capabilities. In addition, two torpedoes can work in the same frequency band without frequency division, thus making the method feasible for use in two-torpedo salvo active homing.

     

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