Universitat Politècnica de Catalunya
Now showing items 315-334 of 346
This dissertation deals with different subset selection problems in wireless communications systems. These type of problems have a combinatorial nature, which makes them computationally intractable for medium and large-scale ...
This thesis introduces a methodology for obtaining an alternative representation of video sequences captured by calibrated multi-camera systems in controlled environments with known scene background. This representation ...
Soil moisture is an essential climate variable that plays a crucial role linking the Earth’s water, energy, and carbon cycles. It is responsible for the water exchange between the Earth’s surface and the atmosphere, and ...
Connect, upload, download, share and transfer anything at anytime and anywhere is not a futuristic vision and is indeed a real demand on current and future wireless and fixed communication systems. From the point of view ...
The meteoric growth of the mobile communication market for the last three decades has been strongly related with the evolution of the electroacoustic (EA) filter technology. With way over 5 billion cell phone users worldwide ...
(English) The deployment of 5G antenna infrastructure and the mandatory adoption of anti-collision radars for automotive cars will require large amount of antennas operating in the millimeter and sub-millimeter wavelength. ...
Terahertz is the portion of the spectrum that covers a frequency range between 300 GHz - 3 THz. This frequency band has proven its potential for imaging applications thanks to the good compromise between spatial resolution ...
This thesis is dedicated to the study of texture analysis and physical interpretation of PolSAR data. As the starting point, a complete survey of the statistical models for PolSAR data is conducted. All the models are ...
En la presente tesis doctoral se ha realizado una serie de aportaciones para contribuir al desarrollo de los sistemas de comunicaciones móviles de tercera generación. Esta nueva generación de sistemas utilizará una técnica ...
El comportamiento de los sistemas actuales de reconocimiento del habla se degrada rápidamente en presencia de ruido de fondo cuando las etapas de entrenamiento y de test no pueden llevarse a cabo en las mismas condiciones ...
Las prestaciones de muchos sistemas de procesado de vozse degradan rápidamente en aplicaciones reales ante lapresencia de ruido. Para solucionar este problema lastécnicas de speech enhancement pretenden reducir esteruido ...
En els últims anys la importància de la polarització en les comunicacions òptiques ha crescut notablement com resultat de tres grans desenvolupaments:<br/>1. L'aparició de l'amplificació òptica ha fet que es produeixi un ...
Firstly, an External Model Deformation Decomposition based Persistent Scatters Interferometry (EMDD-PSI) method has been proposed. This method first uses original interferograms to optimize the parameters of the external ...
This work was developed during a period where most of the optical management and provisioning system where manual and proprietary. This work contributed to the evolution of the state of the art of optical networks with new ...
This thesis aims at contributing to overcome two of the main challenges for the deployment of M2M networks in data collection scenarios for the Internet of Things: the management of massive numbers of end-devices that ...
The rise of third-party content providers and the introduction of numerous applications has been driving the growth of mobile data traffic in the past few years. In order to tackle this challenge, Mobile Network Operators ...
La tesis presenta un modelo no recursivo de sistemas no lineales (SNLS) basado en las series de fourier, estableciendo una comparación con el modelo de volterra en términos de coste computacional y diseño. <br/><br/>Del ...
Worldwide, the coherent technologies have revolutionized the optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation formats and effective ...
The emergence of very capable mobile terminals, e.g. smartphones or tablets, has dramatically increased the demand of wireless data traffic in recent years. Current growth forecasts elucidate that wireless communication ...
Over the last few decades, transistor miniaturization has enabled a tremendous increase in the processing capability of commercial electronic devices, which, combined with the reduction of production costs, has tremendously ...
