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Study of Statistical Tests for Underwater Ambient Noise


Author(s):

Amale Varsha S. , Vidya Pratishthan’s College of Engineering, Baramati; Shastri Rajveer K., Vidya Pratishthan’s College of Engineering, Baramati; Kolhar Shrikrishna U., Vidya Pratishthan’s College of Engineering, Baramati

Keywords:

Ambient noise, Doppler shift, Gaussianity, Hydrophones, Stationarity

Abstract:

Underwater Acoustic Communication is a rapidly growing field of research and engineering. Its main application is of transmitting and receiving data in between underwater instruments like as hydrophones, radars, etc. The use of low-frequency signal comes from the fact that electromagnetic signals get absorbed in underwater due to their high frequency. The wave propagation in underwater sound channel mainly gets affected because of channel variations, multipath propagation and Doppler shift that keep a lot of hurdles for acquiring high data rates and transmission robustness. Basically, the usable bandwidth of an underwater sound channel is typically of few kilohertz at large distances. In addition to that, there is no typical underwater acoustic channel such that every body of water exhibits quantifiably different properties. The problem with the underwater communication is the addition of random noise in the signal. The noise in underwater is of various types such as ambient noise, ship noise, aquatic noise, shallow water noise, etc. which can be categorized as anthropogenic and natural noise sources. For this, there are various techniques based upon signal processing and stochastic replay to denoise the signal. Here, a review of signal Stationarity and Gaussianity testing using different tests is represented.


Other Details:

Manuscript Id :IJSTEV2I7112
Published in :Volume : 2, Issue : 7
Publication Date: 01/02/2016
Page(s): 155-160
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