Browsing by Subject "Signal theory (Telecommunication)"
Now showing items 1-20 of 355
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3Cat-4 nanosatellite mission: development of the ground station
(Universitat Politècnica de Catalunya, 2023-07-07)
Master thesis
Restricted access - confidentiality agreementThis project focuses on the development of a versatile and adaptable ground station, that can be fully operated remotely, so as to meet the mission requirements of the 3Cat-4 satellite. This ground station, has been ... -
60GHz channel characterization using a Scatterer Mapping Technique
(2010)
Conference report
Open AccessIn this paper, a Scatterer Mapping Technique based on a Multi-Frequency Bi-focusing operator with good imaging capabilities is used to characterize the 60GHz wireless channel in an office environment. The measurement data ... -
A BPSK superregenerative receiver. Preliminary results
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009-05)
Conference report
Open AccessThis paper describes a bit-synchronous superregenerative receiver suitable for BPSK demodulation. The output of the superregenerative oscillator (SRO), which reproduces the phase information of the input signal, is ... -
A calibration method for fully polarimetric microwave radiometers
(IEEE Press. Institute of Electrical and Electronics Engineers, 2003-03)
Article
Open AccessA technique for absolute end-to-end calibration of a fully polarimetric microwave radiometer is presented. The technique is based on the tripolarimetric calibration technique of Gasiewski and Kunkee, but is extended to ... -
A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs
(2009-09)
Conference report
Open AccessChannel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could ... -
A cross-layer scheduling strategy for the downlink of a MIMO-OFDMA system with heterogeneous traffic
(2009)
Conference report
Open Accessin this paper we propose and investigate a cross-layer multiuser scheduling strategy for the support of heterogeneous traffic in the downlink of a MIMO-OFDMA system. It jointly considers different objectives: maximize ... -
A field study on satellite and cellular
(IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
Conference report
Restricted access - publisher's policyThis article presents a statistical study on the availability of location sources. In particular, it rates the availability of cellular network base stations and GPS satellites in urban scenarios. Individual and joint ... -
A field study on the fusion of terrestrial and satellite location methods in urban cellular networks
(2010-05-01)
Article
Restricted access - publisher's policyThis work studies the improvement in service coverage obtained by three different approaches to combining two triangulation (terrestrial and satellite) location methods for cellular networks in an urban environment. The ... -
A graph-based strategy to streamline translation quality assessments
(2012)
Conference report
Open AccessWe present a detailed analysis of a graph- based annotation strategy that we employed to annotate a corpus of 11,292 real-world En- glish to Spanish automatic translations with relative (ranking) and absolute ... -
A linear transform for spectral estimation
(1981-10)
Article
Open Access -
A long Saharan dust event over the western Mediterrranean: Lidar, Sun photometer observations and regional dust modeling
(2006-08-31)
Article
Open AccessA long Saharan dust event affected the western Mediterranean in the period 12– 28 June 2002. Dust was present mainly between 1- and 5-km height affecting most parts of the Iberian Peninsula and reaching western/central ... -
A maximum approach for robust MIMO design: combining OSTBC and beamforming with minimum transmission power requirements
(2004)
Conference report
Open AccessIn this paper we address the problem of the design of a transmitter in a Multi-Input-Multi-Output (MIMO) space diversity system. We consider a design which is robust to errors in the channel estimate available at the ... -
A miniaturized two axis sun sensor for attitude control of nano-satellites
(2010-10-10)
Article
Open AccessThis paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ... -
A new subtree-transfer approach to syntax-based reordering for statistical machine translation
(2009-05)
Conference lecture
Open AccessIn this paper we address the problem of translating between languages with word order disparity. The idea of augmenting statistical machine translation (SMT) by using a syntax-based reordering step prior to translation, ... -
A novel autonomous RAT selection algorithm for non real time services
(2009)
Conference report
Open AccessThis paper proposes a new solution for autonomous decision-making in the RAT selection process in multi-service multi-access network scenarios. It is based on exploiting the time dimension in the RAT selection, so that, ... -
A novel framework for dynamic spectrum management in multiCell OFDMA networks based on reinforcement learning
(2010)
Conference report
Open AccessIn this work the feasibility of Reinforcement Learning (RL) for Dynamic Spectrum Management (DSM) in the context of next generation multicell Orthogonal Frequency Division Multiple Access (OFDMA) networks is studied. ... -
A novel strategy for radar imaging based on compressive sensing
(2010-07-08)
Article
Open AccessThis paper aims at introducing the recent theory of compressive sensing to radar imaging systems in order to retrieve the imaged scene with better resolution and a reduced amount of collected samples. As a result of ... -
A rain and scintillation Ka-band channel simulator
(ESA, 2008)
Conference report
Open AccessThis paper describes the implementation of a Ka-band satellite channel simulator with emphasis on the synthesis of scintillation processes. The problem becomes one of generating a given probability density function, ... -
A real-time FPGA-based mobile WiMAX transceiver supporting multi-antenna configurations
(IEEE, 2011)
Conference report
Restricted access - publisher's policyThis paper presents the design, implementation and experimental validation of a real-time FPGA-based mobile WiMAX baseband transceiver. Three different antenna configuration schemes were implemented and tested, namely ... -
A remote laboratory to promote the interaction between university and secondary education
(Universidad Politécnica de Madrid (UPM), 2010)
Conference report
Open AccessiLabRS is a remote laboratory developed in Telecom BCN, the Telecom and Electronics Engineering School of the UPC with the key participation of a Secondary Education Technology teacher. Students and teachers can access ...