Acoustic propagation considerations for underwater acoustic communications network development
ACM SIGMOBILE Mobile Computing and Communications Review
On the relationship between capacity and distance in an underwater acoustic communication channel
ACM SIGMOBILE Mobile Computing and Communications Review
Hierarchical underwater acoustic sensor networks
Proceedings of the Fifth ACM International Workshop on UnderWater Networks
Application of compressive sensing to sparse channel estimation
IEEE Communications Magazine
Concise derivation of scattering function from channel entropy maximization
IEEE Transactions on Communications
Nonstationary system analysis methods for underwater acoustic communications
EURASIP Journal on Advances in Signal Processing - Special issue on recent advances in theory and methods for nonstationary signal analysis
Underwater acoustic communication channel simulation using parabolic equation
Proceedings of the Sixth ACM International Workshop on Underwater Networks
A study on the SPIHT image coding technique for underwater acoustic communications
Proceedings of the Sixth ACM International Workshop on Underwater Networks
International Journal of Communication Systems
Wireless Underwater Communications
Wireless Personal Communications: An International Journal
Time reversal based channel tracking for underwater acoustic communications
Proceedings of the Seventh ACM International Conference on Underwater Networks and Systems
Channel simulation for underwater acoustic communication network
Proceedings of the Seventh ACM International Conference on Underwater Networks and Systems
Asymmetric multi-path division communications in underwater acoustic networks with fading channels
Journal of Computer and System Sciences
Information-theoretic analysis of underwater acoustic OFDM systems in highly dispersive channels
Journal of Electrical and Computer Engineering - Special issue on Underwater Communications and Networking
Underwater Acoustic Multimedia Communication Based on MIMO---OFDM
Wireless Personal Communications: An International Journal
Proceedings of the Eighth ACM International Conference on Underwater Networks and Systems
A new amphibious network infrastructure with hybrid acoustic and radio links
Proceedings of the Eighth ACM International Conference on Underwater Networks and Systems
Study of low-rate OOK and BPSK transmission with PN sequence in shallow water acoustic communication
Proceedings of the Eighth ACM International Conference on Underwater Networks and Systems
Iterative estimation of the time-varying underwater acoustic channel using basis expansion models
Proceedings of the Eighth ACM International Conference on Underwater Networks and Systems
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Acoustic propagation is characterized by three major factors: attenuation that increases with signal frequency, time-varying multipath propagation, and low speed of sound (1500 m/s). The background noise, although often characterized as Gaussian, is not white, but has a decaying power spectral density. The channel capacity depends on the distance, and may be extremely limited. Because acoustic propagation is best supported at low frequencies, although the total available bandwidth may be low, an acoustic communication system is inherently wideband in the sense that the bandwidth is not negligible with respect to its center frequency. The channel can have a sparse impulse response, where each physical path acts as a time-varying low-pass filter, and motion introduces additional Doppler spreading and shifting. Surface waves, internal turbulence, fluctuations in the sound speed, and other small-scale phenomena contribute to random signal variations. At this time, there are no standardized models for the acoustic channel fading, and experimental measurements are often made to assess the statistical properties of the channel in particular deployment sites.