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Open AccessArticle

Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication

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Departamento de Electrónica, Tecnología de Computadores y Proyectos, Universidad Politécnica de Cartagena (UPCT), 30202 Cartagena, Murcia, Spain
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Laboratorio de Hidroacústica (LHA), Centro Tecnológico Naval y del Mar (CTN), Ctra El Estrecho-Lobosillo, Km. 2, 30320 Fuente Álamo, Murcia, Spain
*
Author to whom correspondence should be addressed.
This paper is an extended version of the conference paper: Campo-Valera, M.; Felis, I. Underwater Acoustic Communication for The Marine Environment’s Monitoring. In Proceedings of the The 6th International Electronic Conference on Sensors and Applications (ECSA-6), online, 15–30 November 2019.
Sensors 2020, 20(20), 5878; https://doi.org/10.3390/s20205878
Received: 31 July 2020 / Revised: 28 September 2020 / Accepted: 12 October 2020 / Published: 17 October 2020
(This article belongs to the Special Issue Piezoelectric Transducers)
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 referring to the so-called parametric effect or self-modulation. This article shows the results of using a new modulation technique based on sine-sweep signals, compared to classical modulations (FSK and PSK). For each of these modulations, a series of 16-bit strings of information with different frequencies and durations have been performed, with the same 200 kHz carrier wave. All of them have been tested in the Hydroacoustic Laboratory of the CTN and, through the application of cross-correlation processing, the limitations and improvements of this novel processing technique have been evaluated. This allows reaching better limits in discrimination of bits and signal-to-noise ratio used in underwater parametric acoustic communications. View Full-Text
Keywords: underwater acoustic communication; non-linear acoustic; parametric effect; modulation techniques; acoustic propagation underwater acoustic communication; non-linear acoustic; parametric effect; modulation techniques; acoustic propagation
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Campo-Valera, M.; Felis-Enguix, I.; Villó-Pérez, I. Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication. Sensors 2020, 20, 5878.

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