Browsing Departament de Teoria del Senyal i Comunicacions by Title

Image Compression based on Perceptual Coding Techniques

Casas Pla, Josep Ramon (Date of defense: 1996-03-29)

En aquesta tesi s'estudien els mètodes de codiﬁcació d'imatges i seqüències de vídeo des del punt de vista de la forma en què el sistema visual humà percep i entén la informació visual. La rellevància d'aquest estudi ...

Image segmentation evaluation and its application to object detection

Pont Tuset, Jordi (Date of defense: 2014-02-19)

The first parts of this Thesis are focused on the study of the supervised evaluation of image segmentation algorithms. Supervised in the sense that the segmentation results are compared to a human-made annotation, known ...

IMPACT OF CHANNEL STATE INFORMATION ON THE ANALYSIS AND DESIGN OF MULTIANTENNA COMMUNICATION SYSTEMS

Payaró Llisterri, Miquel (Date of defense: 2007-02-14)

Al llarg d'aquesta última dècada, s'ha produit un creixement constant en la demanda d'elevades taxes de transmissió de dades que han de suportar les aplicacions sobre comunicacions sense fils. Entre les diferents solucions ...

Improving statistical machine translation through adaptation and learning

Henriquez Q., Carlos A. (Date of defense: 2014-03-07)

With the arrival of free on-line machine translation (MT) systems, came the possibility to improve automatic translations with the help of daily users. One of the methods to achieve such improvements is to ask to users ...

Impulsive noise cancellation and channel estimation in power line communication systems

Shrestha, Deep (Date of defense: 2019-09-13)

Power line communication (PLC) is considered as the most viable enabler of the smart grid. PLC exploits the power line infrastructure for data transmission and provides an economical communication backbone to support the ...

Injection of linguistic knowledge into neural text generation models

Casas Manzanares, Noé (Date of defense: 2020-12-14)

Language is an organic construct. It emanates from the need for communication and changes through time, influenced by multiple factors. The resulting language structures are a mix of regular syntactic and morphological ...

Integrated IT and SDN Orchestration of multi-domain multi-layer transport networks

Mayoral López de Lerma, Arturo (Date of defense: 2019-07-25)

Telecom operators networks' management and control remains partitioned by technology, equipment supplier and networking layer. In some segments, the network operations are highly costly due to the need of the individual, ...

Interferometric GNSS-R processing : modeling and analysis of advanced processing concepts for altimetry

Martín Alemany, Francisco (Date of defense: 2015-07-14)

This PhD dissertation is focused on the use of the opportunity signals from the Global Navigation Satellite Systems (GNSS), that scatter-off the Earth's surface for perform ocean mesoscale altimetry (the so called GNSS-R ...

Interferometric orbit determination for geosynchronous earth sensing missions

Nicolás Álvarez, Jorge (Date of defense: 2023-05-16)

(English) Future Geosynchronous Synthetic Aperture Radar (GEOSAR) missions will provide permanent monitoring of continental areas of the planet with revisit times of less than 24 h. Several GEOSAR missions have been studied ...

Introducing linguistic knowledge into statistical machine translation.

Gispert Ramis, Adrià (Date of defense: 2007-01-26)

Aquesta tesi està dedicada a l'estudi de la utilització de informació morfosintàctica en el marc dels sistemes de traducció estocàstica, amb l'objectiu de millorar-ne la qualitat a través de la incorporació de informació ...

Investigation of continuous-wave range-resolved lidar systems for gas detection and concentration measurement

Batet Torrell, Óscar (Date of defense: 2011-07-27)

The techniques for detection of the atmosphere constituents and their distribution in the space have evolved in the last years driven by needs in the environmental, meteorological and climate science fields and backed by ...

Investigation of reflective optical network units for bidirectional passive optical access networks

Arellano Pinilla, Cristina (Date of defense: 2007-07-25)

Esta investigación está conducida a la resolución del problema de encontrar soluciones rentables para el despliegue de redes de fibra hasta el hogar (Fibre to the Home - FTTH). En una red de FTTH, el equipo transmisor-receptor ...

Knowledge graph population from news streams

Fernández Cañellas, Dèlia (Date of defense: 2023-10-09)

(English) Media producers publish large amounts of multimedia content online - both text, audio, image and video. As the online media market grows, the management and delivery of contents becomes a challenge. Semantic ...

Large vocabulary continuous speech recognition for the transcription of Catalan broadcast news and conversations : towards analysis and modelling of acoustic reduction in spontaneous speech

Schulz, Henrik (Date of defense: 2017-03-02)

The transcription of spontaneous speech still poses a challenge to state-of-the-art methods for automatic speech recognition. The present thesis describes the comprehensive development of a large vocabulary continuous ...

Learning multilingual and multimodal representations with language-specific encoders and decoders for machine translation

Escolano Peinado, Carlos (Date of defense: 2022-03-18)

This thesis aims to study different language-specific approaches for Multilingual Machine Translation without parameter sharing and their properties compared to the current state-of-the-art based on parameter-sharing. We ...

Learning to extract features for 2D – 3D multimodal registration

Pujol Miró, Alba (Date of defense: 2020-09-18)

The ability to capture depth information form an scene has greatly increased in the recent years. 3D sensors, traditionally high cost and low resolution sensors, are being democratized and 3D scans of indoor and outdoor ...

Lidar and S-band radar profiling of the atmosphere : adaptive processing for boundary-layer monitoring, optical-parameter error estimation, and application cases

Lange Vega, Diego (Date of defense: 2014-07-17)

This Ph.D. thesis addresses remote sensing of the atmosphere by means of lidar and S-band clear-air weather radar, and related data signal processing. Active remote sensing by means of these instruments offers unprecedented ...