Computer Science ›› 2019, Vol. 46 ›› Issue (9): 113-119.doi: 10.11896/j.issn.1002-137X.2019.09.015

• Network & Communication • Previous Articles     Next Articles

Acoustic Signal Propagation Model and Its Performance in Cave Environment

HE Ming-xing1, ZHOU Jie1,2, WU Peng1, LIU Yang1   

  1. (Deparment of Communications,Nanjing University of Information Science and Technology,Nanjing 210044,China)1;
    (Deparment of Electronic and Electrical Engineering,Niigata University,Niigata 950-2181,Japan)2
  • Received:2018-08-06 Online:2019-09-15 Published:2019-09-02

Abstract: In view of the cave environment,this paper presented a geometric model based on the new environment in the cave.The channel on both sides of the cave gradually widen (narrow) from the entrance to the depth.According to the geometric model,and by means of ray theory,this paper assumed that both sides of the channel surface are approximate smooth,and proposed a random channel model of single transmission and single reception for acoustic signal communication system in cave environment.According to the geometric model,the influence of channel opening angle on channel distribution,instant channel capacity,time autocorrelation function,frequency correlation function,Doppler power spectral density and power delay distribution is studied.The theoretical and simulation results show that compared with the case where both sides of the channel are parallel (i.e.the opening angle of both sides is 0),the statistical characteristics of the acoustic channel wireless communication system will be significantly affected by only a small change in the ope-ning angle of both sides of the channel,and the parallel is a special case of this research content.

Key words: Acoustic signal stochastic model, Channel envelope distribution, Doppler power spectral density, Power delay distribution, Frequency correlation function

CLC Number: 

  • TN911.6
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