Diseño de un amplificador de bajo ruido (LNA) para un receptor basado en el estándar DVB‐H

Proyecto y presentación del Proyecto Fin de Carrera titulado "Diseño de un Amplificador de Bajo Ruido (LNA) para un receptor basado en el Estándar DVB‐H"

Diseño de un mezclador en tecnología SiGe 0.35um para un receptor basado en el estándar DVB-H

Proyecto y presentación del Proyecto Fin de Carrera titulado "Diseño de un Mezclador en Tecnología SiGe 0.35um para un Receptor Basado en el Estándar DVB-H"

Diseño de un oscilador controlado por tensión (VCO) en tecnología SiGe 0.35 µm para el estándar DVB-H

Presentación del Proyecto Fin de Carrera titulado "DISEÑO DE UN OSCILADOR CONTROLADO POR TENSIÓN (VCO) EN TECNOLOGÍA SiGe 0.35 µm PARA EL ESTÁNDAR DVB-H"

Sigma Delta frequency synthesizer for DVB-SH

Programa de doctorado: Ingeniería de telecomunicación avanzada.

Computing inverse optical flow

[EN] We propose four algorithms for computing the inverse optical flow between two images. We assume that the forward optical flow has already been obtained and we need to estimate the flow in the backward direction. The forward and backward flows can be related through a warping formula, which allows us to propose very efficient algorithms. These are presented in increasing order of complexity. The proposed methods provide high accuracy with low memory requirements and low running times.In general, the processing reduces to one or two image passes. Typically, when objects move in a sequence, some regions may appear or disappear. Finding the inverse flows in these situations is difficult and, in some cases, it is not possible to obtain a correct solution. Our algorithms deal with occlusions very easy and reliably. On the other hand, disocclusions have to be overcome as a post-processing step. We propose three approaches for filling disocclusions. In the experimental results, we use standard synthetic sequences to study the performance of the proposed methods, and show that they yield very accurate solutions. We also analyze the performance of the filling strategies. 

CMOS RF front-end receivers for DVB-SH

Programa de doctorado: Ingeniería de Telecomunicación Avanzada.

A PDE model for computing the optical flow

[EN] In this paper we present a new model for optical flow calculation using a variational formulation which preserves discontinuities of the flow much better than classical methods. We study the Euler-Lagrange equations asociated to the variational problem. In the case of quadratic energy, we show the existence and uniqueness of the corresponding evolution problem. Since our method avoid linearization in the optical flow constraint, it can recover large displacement in the scene. We avoid convergence to irrelevant local minima by embedding our method into a linear scale-space framework and using a focusing strategy from coarse to fine scales.