IC - Artículos
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Traffic Monitoring via Mobile Device Location.
Martín, Juan; Jatib Khatib, Emil; Lázaro-Legaz, Pedro
; Barco-Moreno, Raquel (MDPI, 2019-10-15)
Measuring traffic in real time is one of the main functionalities of Smart Cities. To reduce the costs of deployment and operation, traffic measurement with mobile devices has been widely studied. In this paper, a traffic ... -
Optimization of 5G Networks for Smart Logistics.
Jatib Khatib, Emil; Barco-Moreno, Raquel (MDPI, 2021-03-22)
Industry 4.0 is generalizing the use of wireless connectivity in manufacturing and logistics. Specifically, in Smart Logistics, novel Industry 4.0 technologies are used to enable agile supply chains, with reduced management, ... -
Self-healing in mobile networks with big data
Jatib Khatib, Emil; Barco-Moreno, Raquel; Muñoz, Pablo; De la Bandera Cascales, Isabel; Serrano, Inmaculada (IEEE, 2016-01)
Mobile networks have rapidly evolved in recent years due to the increase in multimedia traffic and offered services. This has led to a growth in the volume of control data and measurements that are used by self-healing ... -
Bricked subwavelengh gratings: A tailorable biaxial on-chip metamaterial topology
Luque-González, José Manuel; Ortega-Moñux, Alejandro; Halir, Robert; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Wanguemert-Pérez, Juan Gonzalo[et al.] (Wiley, 2021)
Integrated metamaterials are redefining the capabilities of silicon photonic chips. In providing lithographic control over dielectric permittivity, dispersion and anisotropy, they are enabling photonic devices with ... -
A review of silicon subwavelength gratings: building break-through devices with anisotropic metamaterials
Luque-González, José Manuel; Sánchez-Postigo, Alejandro; Hadij-El-Houati, Abdelfettah; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Halir, Robert[et al.] (De Gruyter, 2021)
Silicon photonics is playing a key role in areas as diverse as high-speed optical communications, neural networks, supercomputing, quantum photonics, and sensing, which demand the development of highly efficient and compact ... -
An ultracompact GRIN lens based spot size converter using subwavelength grating metamaterials
Luque-González, José Manuel; Halir, Robert; Wanguemert-Pérez, Juan Gonzalo; De-Oliva-Rubio, José; Schmid, Jens H.; Cheben, Pavel; Molina-Fernández, Íñigo; Ortega Moñux, Alejandro[et al.] (Wiely, 2019)
Graded-index materials offer virtually complete control over light propagation in integrated photonic chips but can be challenging to implement. Here, an anisotropic graded-index metamaterial, synthesized with fully etched ... -
Polarization splitting directional coupler using tilted subwavelength gratings
Luque-González, José Manuel; Herrero-Bermello, Alaine; Ortega-Moñux, Alejandro; Sánchez-Rodriguez, Marina; Velasco, Aitor V.; Schmid, Jens; Cheben, Pavel; Molina-Fernández, Íñigo; Halir, Robert[et al.] (Optica Publishing Group, 2020)
On-chip polarization splitters are key elements for coherent optical communication systems and polarization diversity circuits. These devices are often implemented with directional couplers that are symmetric for one ... -
Extreme eigenvalue distributions of Jacobi ensembles: new exact representations, asymptotics and finite size corrections
Moreno-Pozas, Laureano; Morales-Jiménez, David; Mckay, Matthew R. (Elsevier, 2019-10)
Let W1 and W2 be independent complex central Wishart matrices with m1 and m2 degrees of freedom respectively. This paper is concerned with the extreme eigenvalue distributions of double-Wishart matrices (W1+W2)^-1 W1, which ... -
A new Approach to the Statistical Analysis of Non-Central Complex Gaussian Quadratic Forms With Applications
Ramírez Espinosa, Pablo; Moreno-Pozas, Laureano; París-Ángel, José Francisco; Cortés-Arrabal, José Antonio; Martos-Naya, Eduardo (Institute of Electrical and Electronics Engineers, 2019-07)
This paper proposes a novel approach to the statistical characterization of non-central complex Gaussian quadratic forms (CGQFs). Its key strategy is the generation of an auxiliary random variable that replaces the original ... -
Largest eigenvalue distribution of noncircularly symmetric Wishart-type matrices with application to Hoyt-faded MIMO communications
Moreno-Pozas, Laureano; Morales-Jimenez, David; Mckay, Matthew R.; Martos-Naya, Eduardo (Institute of Electrical and Electronics Engineers, 2018-03)
This paper is concerned with the largest eigenvalue of the Wishart-type random matrix W = XX† (or W = X†X), where X is a complex Gaussian matrix with unequal variances in the real and imaginary parts of its entries, i.e., ... -
Frequency-tuning dual-comb spectroscopy using silicon Mach-Zehnder modulators.
Deniel, Lucas; Weckenmann, Erwan; Pérez-Galacho, Diego; Alonso-Ramos, Carlos; Boeuf, Frederic; Vivien, Laurent; Marris-Morini, Delphine[et al.] (Optica, 2020)
Dual-comb spectroscopy using a silicon Mach-Zehnder modulator is reported for the first time. First, the properties of frequency combs generated by silicon modulators are assessed in terms of tunability, coherence, and ... -
Add/Drop Mode-Division Multiplexer Based on a Mach–Zehnder Interferometer and Periodic Waveguides.
Pérez-Galacho, Diego; Marris-Morini, Delphine; Ortega-Moñux, Alejandro; Wanguemert-Pérez, Juan Gonzalo; Vivien, Laurent (IEEE, 2015)
Mode-division multiplexing (MDM) is currently under study due to its potential to further increase data rates in optical communication circuits. In this paper, we propose an add/drop MDM for the first- and second-order ... -
Silicon subwavelength modal Bragg grating filters with narrow bandwidth and high optical rejection
Oser, Dorian; Pérez-Galacho, Diego; Le Roux, Xavier; Tanzilli, Sébastien; Vivien, Laurent; Labonté, Laurent; Cassan, Éric; Alonso-Ramos, Carlos[et al.] (Optical Publishing Group, 2020-10-13)
Waveguide Bragg grating filters with narrow bandwidth and high optical rejection are key func- tions for several advanced silicon photonics circuits. Here, we propose and demonstrate a new Bragg grating geometry that ... -
Subwavelength engineering and asymmetry: two efficient tools for sub-nanometer-bandwidth silicon Bragg filters
Oser, Dorian; Pérez-Galacho, Diego; Alonso-Ramos, Carlos; Le Roux, Xavier; Tanzilli, Sébastien; Vivien, Laurent; Labonté, Laurent; Cassan, Éric[et al.] (Optical Publishing Group, 2018-07-02)
Bragg filters stand as a key building blocks of the silicon- on-insulator (SOI) photonics platform, allowing the implementation of advanced on-chip signal manipulation. However, achieving narrowband Bragg filters with ... -
QPSK modulation in the O-band using a single dual-drive Mach-Zehnder silicon modulator
Pérez-Galacho, Diego; Bramerie, Laurent; Baudot, Charles; Chaibi, Mohamed; Messaoudène, Sonia; Vulliet, Nathalie; Vivien, Laurent; Peucheret, Christophe; Marris-Morini, Delphine[et al.] (IEEE, 2018-09-15)
Keeping up with bandwidth requirements in next generation short- and long-reach optical communication systems will require migrating from simple modulation formats such as on-off keying (OOK) to more advanced formats such ... -
Linearization of a Dual-Parallel Mach-Zehnder Modulator Using Optical Carrier Band Processing
Torrijos-Morán, Luis; Catalá-Lahoz, Cristina; Pérez-López, Daniel; Xu, Li; Tianxiang, Wang; Pérez-Galacho, Diego[et al.] (IEEE, 2023-05-15)
The linearization of a microwave photonic link based on a dual-parallel Mach-Zehnder modulator is theoretically de- scribed and experimentally demonstrated. Up to four different radio frequency tones are considered in the ... -
5G Numerologies Assessment for URLLC in Industrial Communications
Segura, David; Jatib Khatib, Emil; Munilla-Fajardo, Jorge; Barco, Raquel (MDPI, 2021-04)
The fifth-generation (5G) network is presented as one of the main options for Industry 4.0 connectivity. Ultra-Reliable and Low Latency Communications (URLLC) is the 5G service category used by critical mechanisms, with a ... -
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 ... -
A Functional Architecture for 6G Special-Purpose Industrial IoT Networks
(IEEE, 2023-03)Future industrial applications will encompass compelling new use cases requiring stringent performance guarantees over multiple key performance indicators, such as reliability, dependability, latency, time synchronization, ... -
Low voltage 25Gbps silicon Mach-Zehnder modulator in the O-band
Pérez-Galacho, Diego; Baudot, Charles; Hirtzlin, Tifenn; Messaoudène, Sonia; Vulliet, Nathalie; Crozat, Paul; Boeuf, Frederic; Vivien, Laurent; Marris-Morini, Delphine[et al.] (Optical Publishing Group, 2017-05-04)
In this work, a 25 Gb ps silicon push-pull Mach-Zehnder modulator operating in the O-Band (1260 nm - 1360 nm) of optical communications and fabricated on a 300 mm platform is presented. The measured modulation efficiency ...