Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (9): 56-62.doi: 10.16180/j.cnki.issn1007-7820.2020.09.010

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The Orthogonal Wideband Signal Modulation and Demodulation Method Based on Chebyshev Bhaotic Sequence

JIANG Yu,REN Longping,BAI Xingyu,OU Hongfei   

  1. School of Electronic Information,Hangzhou Dianzi University,Hangzhou 310018,China
  • Received:2019-06-18 Online:2020-09-15 Published:2020-09-12
  • Supported by:
    National Natural Science Foundation of China(61871163);Zhejiang Provincial Key Laboratory of Equipment Electronics Research(2019E10009)


An orthogonal wideband signal modulation and demodulation method based on Chebyshev chaotic sequence is proposed in this paper to improve the reliability of underwater acoustic communication. The method is based on the environment and propagation characteristics of ocean underwater acoustic channel. The statistical properties of Chebyshev chaotic sequence are close to environmental noise, and it has sharp autocorrelation and broadband characteristics. Based on the properties, Chebyshev chaotic sequence is used as information carrier and synchronization signal in the proposed method. The received signal is demodulated by Euclidean distance classifier. Experimental results show that the method effectively suppresses the frequency selective fading and inter-symbol interference caused by multi-path propagation of the underwater acoustic channel, and achieves reliable underwater acoustic communication under low SNR conditions. The simulation results verify that the communication method has good communication performance on the underwater acoustic channel with multipath effect in the signal-to-noise ratio environment above -10 dB.

Key words: underwater acoustic channel, orthogonal wideband modulation and demodulation, Chebyshev chaotic sequence, Euclidean distance classifier, multi-path effect, underwater acoustic communication

CLC Number: 

  • TN929.3