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Volume 32 Issue 5
May  2010
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Zhou Sheng, Lin Chun-sheng. Design of Chaotic Waveforms and Demodulator for Application to Active Sonar System[J]. Journal of Electronics & Information Technology, 2010, 32(5): 1248-1252. doi: 10.3724/SP.J.1146.2009.00544
Citation: Zhou Sheng, Lin Chun-sheng. Design of Chaotic Waveforms and Demodulator for Application to Active Sonar System[J]. Journal of Electronics & Information Technology, 2010, 32(5): 1248-1252. doi: 10.3724/SP.J.1146.2009.00544

Design of Chaotic Waveforms and Demodulator for Application to Active Sonar System

doi: 10.3724/SP.J.1146.2009.00544
  • Received Date: 2009-04-13
  • Rev Recd Date: 2009-09-28
  • Publish Date: 2010-05-19
  • In this paper a new kind of waveform is proposed to improve covertness of active sonar. A specified code is used to modulate the chaotic signal as waveform of active sonar. The issues of the distortions introduced by filtered by physical underwater channel and additive noise are discussed .Echoes are demodulated by adaptive filter .Recovered signals are identified by stored specified codes. The Lyapunov adaptive filter improved in phase space is applied to be demodulator. The obtained results indicate that proposed demodulator quickly and accurately recover original chaotic signal distorted by additive noise and filter. It is found that chaotic waveforms are better covertness than the classical waveforms of active sonar.
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