Técnica de modulación obtenida a partir del efecto paramétrico: Aplicación a sistemas acústicos submarinos de comunicaciones

Abstract

For years, in the field of underwater acoustics, a line of research with special relevance for applications of environmental monitoring and maritime security has been developed that explores the possibilities of non-linear phenomena of sound propagation, especially the referring to the so-called parametric effect or self-modulation. This work shows the results of using a new modulation technique based on sine-sweep signals. For this modulation, a 16-bit strings of information is presented with 200 kHz carrier frequency and, by applying the cross-correlation method, the limitations and improvements of this processing technique are evaluated. This allows to achieve improvements in the discrimination of the bits used in underwater parametric acoustic communications. Finally, a simulation of the influence of propagation on an acoustic signal is performed for a conventional and a parametric acoustic device.