Title :
Underwater acoustic channel models for 4800 b/s QPSK signals
Author :
Falahati, Abolfazl ; Woodward, Bryan ; Bateman, Stephen C.
Author_Institution :
Dept. of Electron. & Eng., Loughborough Univ. of Technol., UK
fDate :
1/1/1991 12:00:00 AM
Abstract :
Two computer models are presented, one for short-range and one for long-range propagation of acoustic signals through an underwater channel from a transmitter to a receiver. In the short-range model, the received signal is due to a direct path (steady component) and a random path (diffused component) that could be the result of boundary scattering. For the long-range case, the received signal is the superposition of a number of time-delayed, randomly propagated components arriving by different paths. Both models assume perfect transmitter-receiver synchronization but use realistic channel time delays. They demonstrate the time-varying characteristics of underwater acoustic channels and are used in simulations to evaluate the performance of the detection technique
Keywords :
acoustic signal processing; computerised signal processing; delays; digital communication systems; digital simulation; phase shift keying; signal detection; telecommunication channels; underwater sound; 4800 bit/s; QPSK signals; acoustic signals; channel time delays; computer models; interference; long-range propagation; performance evaluation; short range model; signal detection; time-varying characteristics; transmitter-receiver synchronization; underwater acoustic channels; underwater channel; Acoustic applications; Acoustic propagation; Acoustic scattering; Acoustic signal detection; Echo interference; Marine vehicles; Ocean temperature; Quadrature phase shift keying; Sea surface; Underwater acoustics;
Journal_Title :
Oceanic Engineering, IEEE Journal of
