Results 21 to 30 of about 4,455,887 (219)
Acoustic Parametric Signal Generation for Underwater Communication
Sensors, 2018 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 ...
María Campo-Valera +6 more
doaj +1 more source
Sensors, 2020 There is an optical interference noise in the conventional Raman-based fiber-optics distributed sensing, which results in a poor temperature resolution performance. In addition, the traditional whole-fiber demodulation principle complicates the operation
Jian Li +6 more
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Novel adaptation of the demodulation technology for gear damage detection to variable amplitudes of mesh harmonics [PDF]
, 2011 In this paper, a novel adaptive demodulation technique including a new diagnostic feature is proposed for gear diagnosis in conditions of variable amplitudes of the mesh harmonics.
L. Gelman +3 more
core +1 more source
Photonics, 2023 We have established a novel method for quadrature signal construction in a semiconductor laser diode self-mixing interferometry system using two photodiodes and a beam splitter with a liquid crystal phase shifter (LCPS).
Yancheng Li +3 more
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IEEE Photonics Journal, 2022 We demonstrate the use of a self-injection locked distributed feedback (DFB) diode laser for high-sensitivity detection of acoustic emission (AE) using a fiber-coil Fabry-Perot interferometer (FPI) sensor.
Farzia Karim +3 more
doaj +1 more source
A Novel Scheme for Discrete and Secure LoRa Communications
Sensors, 2022 In this paper, we present a new LoRa transceiver scheme to ensure discrete communications secure from potential eavesdroppers by leveraging a simple and elegant spread spectrum philosophy.
Clément Demeslay +4 more
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Self-demodulation effect on subharmonic response of ultrasound contrast agent [PDF]
SPIE Proceedings, 2012 In this work the use of the self-demodulation (S-D) signal as a mean of microbubble excitation at the subharmonic (SH) frequency to enhance the SH emission of ultrasound contrast agent (UCA) is studied. SH emission from the UCA is of interest since it is produced only by the UCA and is free of the artifacts produced in harmonic imaging modes.
V. Daeichin +6 more
openaire +1 more source
A Self-Sensing Active Magnetic Bearing Based on a Direct Current Measurement Approach
Sensors, 2013 Active magnetic bearings (AMBs) have become a key technology in various industrial applications. Self-sensing AMBs provide an integrated sensorless solution for position estimation, consolidating the sensing and actuating functions into a single ...
Carel P. du Rand +2 more
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BPSK Circuit Based on SDC Memristor
Micromachines, 2022 Digital communication based on memristors is a new field. The main principle is to construct a modulation and demodulation circuit by using the resistance variation characteristics of the memristor.
Ran Gao, Yiran Shen
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Photonics, 2023 Operation modes of the optoelectronic oscillator (OEO), based on a phase electrooptic modulator with an acetylene reference cell as a photonic filter, have been investigated.
Vladimir Lebedev +8 more
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