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Performance evaluation of acoustic signals for underwater applications in high-frequency range

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Title Performance evaluation of acoustic signals for underwater applications in high-frequency range
 
Creator Naidu, V. Sanyasi
Padmanabham, M.
Rao, G. Manmadha
Kumar, G.V. Krishna
 
Subject CW
LFM
HFM
Multipath
Doppler
Underwater acoustic channel
 
Description 252-258
Performance evaluation of
high frequency (20-24 kHz) underwater acoustic waveforms
such as CW, LFM and HFM was carried out
theoretically in the presence
of white Gaussian
noise, multipath and Doppler.
Measured sound speed profiles off Indian coast were used in ray based models Bellhop and VirTEX to mimic the environment with multipath and Doppler.
The source signals were convolved
with channel impulse
response function
to predict the received
signal. Correlation between the transmitted and received
signal was used to evaluate
the performance of waveforms. Performance evaluation studies have revealed that LFM and HFM have better resistance to additive white Gaussian noise than CW. Similarly multipath has affected
CW the most while HFM and LFM are resistant
to it. The Doppler imposed by the source/receiver motion has very little effect on HFM followed by LFM and CW. It was also found that both LFM and HFM have shown greater resistance
to Doppler when the receiver
is close to the surface.
 
Date 2016-07-04T09:24:04Z
2016-07-04T09:24:04Z
2015-02
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34645
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.44(02) [February 2015]