scholarly journals Performance Evaluation of Underwater Acoustic Communication in Frequency Selective Shallow Water

2013 ◽  
Vol 32 (2) ◽  
pp. 95-103 ◽  
Author(s):  
Kyu-Chil Park ◽  
Jihyun Park ◽  
Seung Wook Lee ◽  
Jin Woo Jung ◽  
Jungchae Shin ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Shallow Water ◽  
Acoustic Communication ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Frequency Selective

Experimental Multipath Delay Profile of Underwater Acoustic Communication Channel in Shallow Water

2016 ◽  
Vol 2 (2) ◽  
pp. 351 ◽  
Author(s):  
Yasin Yousif Al_Aboosi ◽  
Ahmad Zuri Sha'ameri
Keyword(s):  
Shallow Water ◽  
Acoustic Communication ◽  
Multipath Propagation ◽  
Water Channel ◽  
Underwater Acoustic Communication ◽  
Communication Performance ◽  
Underwater Acoustic ◽  
Research Fields ◽  
Different Depths ◽  
Major Factors

<p>The shallow water channel is an environment that is of particular interest to many research fields. An underwater acoustic channel is characterized as a multipath channel. Time-varying multipath propagation is one of the major factors that limit the acoustic communication performance in shallow water. This study conducts two underwater acoustic experiments in Tanjung Balau, Johor, Malaysia. A transducer and a hydrophone are submerged at different depths and separated by different distances. Linear frequency modulated (LFM) pulses are chosen as the main transmit signal for the experiments. The cross-correlation between the transmitted and received signals represents the impulse response of the channel (multipath profile). The results show that the amplitude of the successive paths will not rapidly decline, and vice versa, when the distance between the sender and the receiver increases. Moreover, the time difference between the different paths will be small in the case of distance increase. In other words, the successive paths will converge in time.</p>

scholarly journals Analytical Performance Evaluation of GFDM in Underwater Acoustic Communication Systems

2021 ◽  
Author(s):  
Alexander Hilario-Tacuri ◽  
Leonel Soncco ◽  
Diego Donaires ◽  
Juan Borja
Keyword(s):  
Performance Evaluation ◽  
Wireless Communications ◽  
Acoustic Communication ◽  
Communication Systems ◽  
Underwater Acoustic Communication ◽  
Time Model ◽  
Underwater Acoustic ◽  
Communications Systems ◽  
Wide Range ◽  
Analytical Expressions

The rapid growth of the Internet of Things (IoT) has extended its concept to underwater environments. However, the implementation of these systems via wired communication still represents a technological challenge, mainly due to the high cost of their deployment. Therefore, wireless communications are seen as an interesting solution for the deployment of underwater communications systems. Preliminary research indicated that underwater acoustic wireless communication could be used for some Internet of Underwater Things applications, mainly due to the wide range of communications involved. However, a significant disadvantage of acoustic systems is their low transmission data rate; thus, studies and analyses to improve this disadvantage must be carried out. Considering that new waveforms have been proposed to improve the performance of terrestrial wireless communications systems, this work presents the development of general analytical expressions that allow the performance evaluation of the Generalized Frequency Division Multiplexing (GFDM) waveform in underwater environments. These analytical expressions were obtained considering a continuous-time model for the GFDM signal and modeling the underwater acoustic communication channel as a time-varying multipath channel. Numerical results were obtained for many different systems and channel parameters, allowing a quantitative evaluation of the system performance degradation.

Experimentation of MIMO underwater acoustic communication in shallow water channel

2017 ◽  
Author(s):  
Pierre-Jean Bouvet ◽  
Yves Auffret ◽  
Didier Munck ◽  
Alain Pottier ◽  
Guy Janvresse ◽  
...  
Keyword(s):  
Shallow Water ◽  
Acoustic Communication ◽  
Water Channel ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic
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