This page has only limited features, please log in for full access.

Dr. María Campo-Valera
Universidad Politécnica de Cartagena

Basic Info


Research Keywords & Expertise

0 Signal Processing for Communications
0 ultrasound waves
0 ultrasound transducers
0 Nonlinear Acoustics
0 Parametric acoustic generation

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Conference paper
Published: 14 November 2020 in Proceedings of 7th International Electronic Conference on Sensors and Applications
Reads 0
Downloads 0

Acoustic leaky-wave antennas (ALWAs) have demonstrated the capacity to steer directive sound waves in frequency-dependent directions, due to the inherent dispersive radiation characteristic of leaky modes. Compared to more conventional uniform linear array (ULA) acoustic traducers for electronic beam steering (which rely on multiple sensors), the ALWA allows for single microphone operation. Thus, ALWAs offer a direct mechanism to scan a directive acoustic beam in the angular space by simply sweeping the operating frequency of the acoustic signal, which envisions cost-efficient single-transducer direction finders for SONAR applications. In this paper, we study for the first time some important features of an ALWA for acoustic underwater Direction-of-Arrival (DoA) estimation applications. First, we report for the first time on the necessity to shape the radiated ALWA beams in both far- and near-field zones to improve the DoA estimation performance, following similar techniques recently applied for low-cost frequency-scanned direction-finding radars based on LWAs. Furthermore, the capacity to reduce the Side Lobe Level (SLL) has been analyzed in order to improve performance, demonstrating aperture tapering techniques to the ALWA for the first time. These acoustic behaviour aspects have a considerable interest in real applications of ALWA in innovative SONAR systems for underwater scenarios.

ACS Style

Ivan Felis-Enguix; Jorge Otero-Vega; María Campo-Valera; Isidro Villó-Pérez; J. L. Gómez-Tornero. Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding. Proceedings of 7th International Electronic Conference on Sensors and Applications 2020, 2, 93 .

AMA Style

Ivan Felis-Enguix, Jorge Otero-Vega, María Campo-Valera, Isidro Villó-Pérez, J. L. Gómez-Tornero. Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding. Proceedings of 7th International Electronic Conference on Sensors and Applications. 2020; 2 (1):93.

Chicago/Turabian Style

Ivan Felis-Enguix; Jorge Otero-Vega; María Campo-Valera; Isidro Villó-Pérez; J. L. Gómez-Tornero. 2020. "Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding." Proceedings of 7th International Electronic Conference on Sensors and Applications 2, no. 1: 93.

Journal article
Published: 17 October 2020 in Sensors
Reads 0
Downloads 0

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.

ACS Style

María Campo-Valera; Ivan Felis-Enguix; Isidro Villó-Pérez. Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication. Sensors 2020, 20, 5878 .

AMA Style

María Campo-Valera, Ivan Felis-Enguix, Isidro Villó-Pérez. Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication. Sensors. 2020; 20 (20):5878.

Chicago/Turabian Style

María Campo-Valera; Ivan Felis-Enguix; Isidro Villó-Pérez. 2020. "Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication." Sensors 20, no. 20: 5878.

Proceedings
Published: 14 November 2019 in Proceedings
Reads 0
Downloads 0

Within the possibilities of non-linear acoustics, the parametric effect offers a range of acoustic applications that are currently being exploited in different areas. In underwater acoustics, environmental monitoring and security are one of the applications that can benefit from these technologies, allowing the transmission of information in a directivity controlled and efficient manner. An essential aspect for the optimal functioning of these technologies is the choice of the modulation that best suits the needs of communication. In the present work, different modulation techniques are explained, through their non-linear propagation, that allows generating the signals to be propagated. Among the modulations presented in this work, we have Amplitude Modulation (AM), Continuous Phase Frequency Shift Keying (CPFSK), and Linear Frequency Modulation (LFM) modulations normally used in communications. These modulations are performed with a modulating signal (sine and sine-sweeps type) whose non-linear demodulation determines the shape of the 1 and 0 bits, through the transmission of a bit string. With all this, comparisons are made between each technique, to obtain a more precise detection and discrimination of the bits.

ACS Style

María Campo-Valera; Ivan Felis. Underwater Acoustic Communication for The Marine Environment’s Monitoring. Proceedings 2019, 42, 51 .

AMA Style

María Campo-Valera, Ivan Felis. Underwater Acoustic Communication for The Marine Environment’s Monitoring. Proceedings. 2019; 42 (1):51.

Chicago/Turabian Style

María Campo-Valera; Ivan Felis. 2019. "Underwater Acoustic Communication for The Marine Environment’s Monitoring." Proceedings 42, no. 1: 51.

Journal article
Published: 04 July 2018 in Sensors
Reads 0
Downloads 0

This paper presents a study of different types of parametric signals with application to underwater acoustic communications. In all the signals, the carrier frequency is 200 kHz, which corresponds to the resonance frequency of the transducer under study and different modulations are presented and compared. In this sense, we study modulations with parametric sine sweeps (4 to 40 kHz) that represent binary codes (zeros and ones), getting closer to the application in acoustic communications. The different properties of the transmitting signals in terms of bit rate reconstruction, directivity, efficiency, and power needed are discussed as well.

ACS Style

María Campo-Valera; Miguel Ardid; Dídac D. Tortosa; Ivan Felis; Juan A. Martínez-Mora; Carlos D. Llorens; Pablo Cervantes. Acoustic Parametric Signal Generation for Underwater Communication. Sensors 2018, 18, 2149 .

AMA Style

María Campo-Valera, Miguel Ardid, Dídac D. Tortosa, Ivan Felis, Juan A. Martínez-Mora, Carlos D. Llorens, Pablo Cervantes. Acoustic Parametric Signal Generation for Underwater Communication. Sensors. 2018; 18 (7):2149.

Chicago/Turabian Style

María Campo-Valera; Miguel Ardid; Dídac D. Tortosa; Ivan Felis; Juan A. Martínez-Mora; Carlos D. Llorens; Pablo Cervantes. 2018. "Acoustic Parametric Signal Generation for Underwater Communication." Sensors 18, no. 7: 2149.

Proceedings
Published: 14 November 2017 in Proceedings
Reads 0
Downloads 0

This paper presents a study of different types of parametric signals with application to submarine acoustic telecommunications. In all of them, the carrier frequency is 200 kHz, which corresponds to that resonation of the transducer under study, while they differ by the different modulations they present. In this sense, we study modulations with sweeps (4 to 40 kHz), in which represent binary codes (zeros and ones), getting closer to the application in acoustic telecommunications. The different properties of the transmitting signals in terms of communication speed, directivity, efficiency and power needed are discussed as well.

ACS Style

Miguel Ardid; María Campo-Valera; Dídac D. Tortosa; Ivan Felis; Carlos D. Llorens; Juan A. Martínez-Mora. Underwater Communication Using Acoustic Parametric Arrays. Proceedings 2017, 2, 139 .

AMA Style

Miguel Ardid, María Campo-Valera, Dídac D. Tortosa, Ivan Felis, Carlos D. Llorens, Juan A. Martínez-Mora. Underwater Communication Using Acoustic Parametric Arrays. Proceedings. 2017; 2 (3):139.

Chicago/Turabian Style

Miguel Ardid; María Campo-Valera; Dídac D. Tortosa; Ivan Felis; Carlos D. Llorens; Juan A. Martínez-Mora. 2017. "Underwater Communication Using Acoustic Parametric Arrays." Proceedings 2, no. 3: 139.