Listar IC - Artículos por título
Mostrando ítems 173-183 de 183
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Ultra-efficient surface grating couplers for chip-to-fiber and chip-to-free-space coupling based on single-beam radiation.
Sánchez-Postigo, Alejandro; Ginel-Moreno, Pablo; Schmid, Jens H.; Hadij-El-Houati, Abdelfettah; Ortega-Moñux, Alejandro
; Wanguemert-Pérez, Juan Gonzalo; Halir, Robert; Cheben, Pavel; Molina-Fernández, Íñigo[et al.] (Optica Publishing Group, 2024-10-28)
Surface grating couplers, such as fiber-chip grating couplers and optical antennas, are fundamental devices in photonic integrated circuits, as they enable the coupling of light between the chip and an external medium. An ... -
Ultra-Wideband VCO Phase-Noise Reduction Loop Based on a Six-Port Phase-Shifterless Delay-Line Discriminator.
Ávila Ruiz, Juan Manuel; Molina-Fernández, Íñigo; Moreno-Pozas, Laureano; Moscoso Mártir, Álvaro (IEEE Transactions on Microwave Theory and Techniques, 2014-11-14)
In this paper, a novel frequency-locked loop (FLL) architecture for phase-noise reduction of wideband voltage-controlled oscillators (VCO) is presented. The circuit makes use of a phase-shifterless frequency discriminator, ... -
Underwater Positioning System Based on Drifting Buoys and Acoustic Modems
Otero-Roth, Pablo; Hernández-Romero, Álvaro; Luque-Nieto, Miguel Ángel; Ariza-Quintana, Alfonso (MDPI, 2023-03-23)
GNSS (Global Navigation Satellite System) positioning is not available underwater due to the very short range of electromagnetic waves in the sea water medium. In this article a LBL (Long Base Line) acoustic repeater system ... -
Unraveling brain synchronisation dynamics by explainable neural networks using EEG signals. Application to dyslexia diagnosis
Gallego-Molina, Nicolás J.; Ortiz-García, Andrés; Arco, Juan E.; Martinez-Murcia, Francisco J.; Woo, Wai Lok (Springer, 2024-07)
The electrical activity of the neural processes involved in cognitive functions is captured in EEG signals, allowing the exploration of the integration and coordination of neuronal oscillations across multiple spatiotemporal ... -
Using the Uniform Theory of Diffraction to Analyze Radio Wave Propagation along Urban Street Canyons for Device-to-Device Communication
(IOAP-MDPI, 2023-01-25)This paper examines the propagation of radio waves in so-called urban street canyons through formulations based on Geometrical Optics (GO) and the Uniform Theory of Diffraction (UTD). As this type of environment comprises ... -
Using XAI in the Clock Drawing Test to reveal the cognitive impairment pattern.
Jiménez-Mesa, Carmen; Arco, Juan E.; Valentí-Soler, Meritxell; Frades-Payo, Belén; Zea-Sevilla, María A.; Ortiz-García, Andrés; Ávila-Villanueva, Marina; Castillo-Barnes, Diego; Ramírez, Javier; Del-Ser-Quijano, Teodoro; Carnero Pardo, Cristóbal; Górriz-Sáez, Juan Manuel[et al.] (World Scientific, 2023-02-16)
he prevalence of dementia is currently increasing worldwide. This syndrome produces a deteriorationin cognitive function that cannot be reverted. However, an early diagnosis can be crucial for slowing itsprogress. The Clock ... -
Victim Detection and Localization in Emergencies
Álvarez-Merino, Carlos Simón; Jatib Khatib, Emil; Qiang Luo-Chen, Hao; Barco-Moreno, Raquel (IOAP-MPDI, 2022-11-02)
Detecting and locating victims in emergency scenarios comprise one of the most powerful tools to save lives. Fast actions are crucial for victims because time is running against them. Radio devices are currently omnipresent ... -
Wideband Ultrasonic Acoustic Underwater Channels: Measurements and Characterization.
López-Fernández, Jesús Manuel; Fernández-Plazaola, Unai; París-Ángel, José Francisco; Díez-del-Río, Luis; Martos-Naya, Eduardo (IEEE, 2020-02-12)
In this work we present the results of a measurement campaign carried out in the Mediterranean sea aimed at characterizing the underwater acoustic channel in a wideband at ultrasonic frequencies centered at 80 kHz with ... -
WiFi FTM, UWB and cellular-based radio fusion for indoor positioning
Álvarez-Merino, Carlos Simón; Luo Chen, Hao Qiang; Jatib Khatib, Emil; Barco-Moreno, Raquel (MDPI, 2021-10)
High-precision indoor localisation is becoming a necessity with novel location-based services that are emerging around 5G. The deployment of high-precision indoor location technologies is usually costly due to the high ... -
Wireless backhaul: Performance Modelling and Impact on User Association for 5G.
(IEEE, 2018-02-22)Wireless technology is the strongest contender for catering for the 5G backhaul (BH) stipulated performance, where optical fiber is unavailable. In the presence of ultra-dense networks, such occurrences are exponentially ... -
Women in Telecommunication Engineering: Case Studies.
Barbancho-Pérez, Ana María; Barbancho-Pérez, Isabel; Tardón-García, Lorenzo José; Peinado-Domínguez, Alberto (IEEE, 2024)
The enrolment of women in STEM (Science, Technology, Engineering, Mathematics) degrees and, in particular, in Telecommunication Engineering shows a decreasing trend. Among the general competences common to all the degrees ...