Characterization and Modeling of Underwater Acoustic Communications Channels for Frequency-Shift-Keying Signals

OCEANS 2006 ◽  
2006 ◽  
Author(s):  
Wen-bin Yang ◽  
T.c. Yang
Keyword(s):  
Frequency Shift ◽  
Underwater Acoustic Communications ◽  
Acoustic Communications ◽  
Frequency Shift Keying ◽  
Underwater Acoustic ◽  
Shift Keying

scholarly journals M-ary Cyclic Shift Keying Spread Spectrum Underwater Acoustic Communications Based on Virtual Time-Reversal Mirror

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3577
Author(s):  
Zhou ◽  
Liu ◽  
Nie ◽  
Yang ◽  
Zhang ◽  
...  
Keyword(s):  
Time Reversal ◽  
Spread Spectrum ◽  
Underwater Acoustic Communications ◽  
Cyclic Shift ◽  
Acoustic Communications ◽  
Underwater Acoustic ◽  
Underwater Acoustic Channels ◽  
Shift Keying ◽  
Virtual Time ◽  
Time Reversal Mirror

Underwater acoustic communications are challenging because channels are complex, and acoustic waves when propagating in the ocean are subjected to a variety of interferences, such as noise, reflections, scattering and so on. Spread spectrum technique thus has been widely used in underwater acoustic communications for its strong anti-interference ability and good confidentiality. Underwater acoustic channels are typical coherent multipath channels, in which the inter-symbol interference seriously affects the performance of underwater acoustic communications. Time-reversal mirror technique utilizes this physical characteristic of underwater acoustic channels to restrain the inter-symbol interference by reconstructing multipath signals and reduce the influence of channel fading by spatial focusing. This paper presents an M-ary cyclic shift keying spread spectrum underwater acoustic communication scheme based on the virtual time-reversal mirror. Compared to the traditional spread spectrum techniques, this method is more robust, for it uses the M-ary cyclic shift keying spread spectrum to improve the communication rate and uses the virtual time-reversal mirror to ensure a low bit error rate. The performance of this method is verified by simulations and pool experiments.

scholarly journals Fully Quadrature Subcarrier-Index Shift Keying for Efficient Underwater Acoustic Communications

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 46975-46984
Author(s):  
Hany S. Hussein ◽  
Turki M. Alanazi ◽  
Mohammed Zubair Shamim ◽  
Mohammed Sayeeduddin Habeeb ◽  
Mohammed Usman ◽  
...  
Keyword(s):  
Underwater Acoustic Communications ◽  
Acoustic Communications ◽  
Underwater Acoustic ◽  
Shift Keying

Multi-channel time frequency shift keying in underwater acoustic communication

2016 ◽  
Vol 103 ◽  
pp. 54-63 ◽  
Author(s):  
Xiaoyi Hu ◽  
Deqing Wang ◽  
Yurong Lin ◽  
Wei Su ◽  
Yongjun Xie ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Acoustic Communication ◽  
Underwater Acoustic Communication ◽  
Frequency Shift Keying ◽  
Underwater Acoustic ◽  
Time Frequency ◽  
Shift Keying
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