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Heat shrinkable tubes were investigated as HV insulation for complex conductor configuration in terms of applicability and thermo-electrical performance. Overall, the tests show the high potential of heat shrinkable systems for such application. However, for producing insulated conductors from the pre-manufactured tubes, further improvements of the electrical configuration of the full insulation system...
Narrow-band speech coding techniques were previously found to reduce the accuracy of automatic Speech Emotion Recognition (SER), as well as speech and speaker recognition rates. Artificial Bandwidth Extension (ABE) based on spectral folding and spectral envelope estimation has been applied to compressed narrowband speech to test if an improvement in SER can be achieved. The modelling and classification...
We report on optically controlled antennas and photonic downconversion for mm-wave wireless communication applications. Experimental results demonstrate a transmission of 1.25 Gb/s using 28 and 38GHz frequency bands.
Electrochemotherapy is an electroporationbased treatment successfully used in palliation of cutaneous and subcutaneous tumors. Its high response rate encourage further research on electrochemotherapy applied in deep tissues as a minimally invasive procedure for primary tumors. In order to assess electrochemotherapy effectiveness in breast primary tumors in Mexico, it is presented a review of background,...
Coherent sub-mesoscale features such as spiral eddies are known to be ubiquitous in the world's oceans. Yet, due to their complex geometry, they are often difficult to characterize. Sub-mesoscale ocean dynamics with characteristic dimensions on the order of kilometers have been found to play a major role in upper ocean stirring and mixing. Manifestations of these structures all around the Caribbean...
This paper demonstrates experimentally the distribution of radio-over-fiber (RoF) signals using orbital angular momentum (OAM) of light over standard OM4 multimode fiber (MMF) at 850 nm wavelength. Five independent OAM modes are used to convey RoF signals in the microwave regime showing robust performance and therefore opening new prospects for enhancing the capacity of MMF based RoF Links.
This paper proposes and demonstrates an RFID-over-Fiber wireless track and trace system using active RFID tags and operating over distances up to 30 km of optical fiber and 35 meters of wireless readability.
This paper presents a wideband inductorless Balun-LNA targeting spin torque oscillator-based magnetic field sensing applications. The LNA consists of a CS stage combined with a cross-coupled CG stage, which offers wideband matching, noise/distortion cancellation and gain boosting, simultaneously. The Balun-LNA is implemented in a 65 nm CMOS technology, and it is fully ESD-protected and packaged. Measurement...
This paper presents the FLEXOR platform, a modular tool for prototype Wearable Body Area Network (WBAN) applications. This platform is intended to reduce costs, effort and complexity of a WBAN project. The platform is set to a star topology, and allows the configuration of active modules, independent sampling times and ID assignation to each node through a Graphic User Interface (GUI). Finally, a...
This paper presents a step-by-step design procedure for a Class-E Power Amplifier, focusing in the consequences that component variations (re-tuning) have on the overall circuit performance, based on certain evaluation parameters. A proper analysis of these parameters shows that a traditional re-tuning procedure, whose main goal is to achieve zero voltage switching (ZVS) conditions, does not necessarily...
We report on a wafer scale fabrication of graphene based field effect transistors (GFETs) for use in future radio frequency (RF) and sensor applications. The process is also almost entirely CMOS compatible and uses a scalable graphene transfer method that can be incorporated in standard CMOS back end of the line (BEOL) process flows. Such a process can be used to integrate high speed GFET devices...
Today, telephone users are already realizing the multimedia dream as the AT&T VideoPhone 2500, Picasso® and Vistium™ products are introduced into consumer's homes and onto office desktops. A major, common element of these products is a display screen that provides a visual perspective. In addition, end-users now have a choice about what they can view at any given instant. The quality of this choice...
In this paper, a system based on time-hopping spread spectrum techniques for indoor visible light communications is studied via simulation. A 2-PPM modulation scheme is selected because it yields good results in wireless optical communications. Furthermore, the system allows for selecting the number of pulses per symbol to be transmitted and makes use of an optimum maximum-likelihood receiver for...
A two-step continuous-time (CT) incremental sigma??delta (Iσδ) ADC, which enhances the performance of conventional CT Iσδ ADCs, is proposed. By pipelining two second-order CT Iσδ ADCs, the proposed two-step architecture can achieve high resolution without sacrificing the conversion rate. Compared to other alternatives, the two-step CT Iσδ ADC exhibits the freedom of adjusting its accuracy and speed...
Peer to Peer (P2P) computer networks rely on direct connections between participants instead of conventional centralized resources. These networks are useful for many purposes, but the killer application nowadays is file sharing. BitTorrent is a very popular protocol for this matter. In this paper, we use a multi-agent model of a BitTorrent network. In it, each BitTorrent client is an agent that interacts...
Peer to Peer (P2P) computer networks rely on direct connections between participants instead of conventional centralized resources. These networks are useful for many purposes, but the killer application nowadays is file sharing. BitTorrent is a very popular protocol for this matter. In this paper, we use a multi-agent model of a BitTorrent network. In it, each BitTorrent client is an agent that interacts...
The aim of this research has a two-fold objective. On the one hand, it attempts to assist employers of Catalan micro-retailers in designing, implementing and developing their Social Media strategy as a complementary channel of communication. On the other hand, it attempts to contribute to the research community with a better understanding on how a set of mediator variables incise in the transformation...
Robust communications protocols are widely used in safety critical applications, such as aerospace or automotive systems. On-board complex systems, working in harsh environments, are composed of distributed modules with a high degree of interaction and critical tasks replication. Single Event Upsets (SEUs) are very probable to affect these modules and their communications. Robust protocols are usually...
In this paper we present a practical laboratory experiment intended for undergraduate and graduate Electronic Engineering courses on Digital Communications Systems. The main objective of the experiment is to design and implement the electronics of a baseband system that uses pulse code modulation (PCM) to transmit audio signals digitally.
Graphene has caught the attention of the electronic device community as a potential future option for More Moore and More Than Moore devices and applications. This is owed to its remarkable material properties, which include ballistic conductance over several hundred nanometers or charge carrier mobilities of several 100.000 cm2/Vs in pristine graphene. Furthermore, standard CMOS technology may be...
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