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Volume 24 Issue 5
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2016  >  24(5): 340-345
HOU Xin-yu, CHEN Hang. Waveform Design and Echo Characteristic of Underwater Carrier-free Ultra-Wide Band Signal[J]. Journal of Unmanned Undersea Systems, 2016, 24(5): 340-345. doi: 10.11993/j.issn.1673-1948.2016.05.005
Citation: HOU Xin-yu, CHEN Hang. Waveform Design and Echo Characteristic of Underwater Carrier-free Ultra-Wide Band Signal[J]. Journal of Unmanned Undersea Systems, 2016, 24(5): 340-345. doi: 10.11993/j.issn.1673-1948.2016.05.005
shu

Waveform Design and Echo Characteristic of Underwater Carrier-free Ultra-Wide Band Signal

doi: 10.11993/j.issn.1673-1948.2016.05.005
  • 1.

    School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an 710072

  • 2.

    National Key Lab of Underwater Information Processing and Control, Xi′an 710072

  • Received Date: 2016-06-27
  • Rev Recd Date: 2016-07-13
  • Publish Date: 2016-10-20
    Abstract
  • The design of signal waveform is very important for improving torpedo homing performance under complex underwater acoustic environment. Ultra-wide band signal has many advantages in target detection, such as high resolution, strong penetrability, and low duty ratio. In this paper, According to the Ricker waveform of underwater acoustic signals modulated by different bit baker codes, the signal′s bandwidth, frequency spectrum and energy uniformity within a frequency band are analyzed, a Ricker signal modulated by a 4 bit baker code is optimized as an underwater carrier-free ultra-wide band signal. Based on this kind of ultra-wide band signal, the echo characteristic simulation analysis of submarine target is carried out, and the influences of incident angle and signal waveform with different pulse interval on the echo of multi-highlight target are obtained. Simulation results verify the feasibility of this kind of pulse signal in underwater target detection, and may provide reference for further research on application of ultra-wide band signal to underwater target detection.

     

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