Parametric transmission of wide-band signals

Loubet, G.; Vial, F.; Essebbar, A.; Kopp, L.; Cano, D.

doi:10.1109/oceans.1996.568338

Cited by 8 publications

(4 citation statements)

References 2 publications

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“…Subsequently, it has become popular in the field of underwater acoustics as regards the processing of parametric array signals [ 2 , 3 , 4 ]. These parametric acoustic sources are gradually being used in detection sonars and communication sonars in shallow water [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication

Campo-Valera

Felis

Villó-Pérez

2020

Sensors

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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.

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Section: Introductionmentioning

confidence: 99%

Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication

Campo-Valera

Felis

Villó-Pérez

2020

Sensors

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“…In this way, a modulated wave with favourable properties can be generated. Although some prototypical PUC systems have been realized and reported in literature [2], [3], [4], [5], only minor work on the system performance from the information theoretical point of view has been done.…”

Section: Introductionmentioning

confidence: 99%

Constellation-constrained capacities for parametric underwater communication

Wiedmann

Weber

2013

2013 MTS/IEEE OCEANS - Bergen

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In this paper, constellations-constrained capacities of a parametric underwater communication system, which employs robust modulation for quadrature-amplitude-modulation, are analysed. A parametric underwater communication (PUC) system uses nonlinear effects in the underwater channel for data transmission.For performance analysis from the information theoretical point of view, a nonlinear channel model for PUC is derived from the physical modelling. On this basis, robust modulation is discussed and a time-discrete equivalent lowpass channel model is derived. According to this, appropriate constellations are introduced and the corresponding achievable transmission rates are determined. To evaluate the overall performance loss, the maximum achievable transmission rate of the system, which is the channel capacity of the considered equivalent lowpass channel, is calculated numerically. For this purpose, the nonlinear channel is transformed to a linear channel with adapted constraints.The results give valuable insights in the performance of a PUC system from the information theoretical point of view and support the system design.

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“…Although the theory of nonlinear wave propagation in fluids is well known since the 20th century, only a few parametric communication systems for digital data transmission were realized and reported [2], [3], [4]. Considerably work in this field was done in the MAST project ,,PARACOM", where parametric communication was employed and different modulation schemes were tested, among others FSK, MSK and BPSK [5]. In connection to this, a parametric communication link for long range communication using M -DPSK modulation was demonstrated [6].…”

Section: Introductionmentioning

confidence: 99%