Burenin A.V., Voytenko E.A., Lebedev M.S., Morgunov Yu.N., Tagiltsev A.A.
The article presents the results of experimental and theoretical researches on the propagation and reception in underwater sound channels (USC) of broadband impulse signals based on pseudo-random sequences. Analysis of the experimentally obtained impulse responses indicates the presence of prerequisites for increasing the noise immunity of receiving navigation and command signals, as well as increasing the range at a constant power. The purpose of the specially performed experimental work was to obtain initial data to improve the efficiency of long-range navigation systems by optimizing the characteristics of the emitted signals. The features of the formation of impulse responses when receiving signals with different frequency bands and durations of symbols, as well as the dynamics of the structure of responses at displacements of the depth of the receiving hydrophone relative to the USC axis, have been investigated. On the basis of ray representations, a physical interpretation of the obtained experimental results is carried out for practical application in solving urgent problems of underwater acoustics and oceanology.
