Browsing by Subject "Telecomunicació"
Now showing items 1-20 of 768
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62: Una herramienta interactiva para el estudio del tratamiento de la señal
(Universidad de las Palmas de Gran Canaria, 1994)
Conference report
Open Access -
A billingual texto-to-speech system in spanish and catalan
(Editors: G. Kokkinakis, N. Fakotakis, E. Dermatas; Editorial: WCL, University of Patras, Grece, 1997)
Conference report
Open AccessThis paper summarises the text-to-speech system that has been developed during the last years in the Speech Group of the Universitat Politccnica de Catalunya (UPC). The paper emphasises the parts of the system which are ... -
A broadcast synthesized fm modulator with a radio data system encoder
(1996-06)
Article
Open AccessThe design and development of a broadcast FM modulator with a RDS (radio data system) encoder is presented. The system is fully coherent with the modulated RF frequency synthesized in the 875-108 MHz frequency band with ... -
A channel characterization technique for HF communications
(1985)
Conference report
Open AccessA wideband channel sounder to characterize the HF radio channel is described. Based on a pseudorandom sequence technique it allows the measurement of the complex impulsional response of the channel with time and frequency ... -
A combined polling and ISMA-DS/CDMA protocol to provide QoS in packet mobile communications systems
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Conference report
Open AccessThis paper presents a new mechanism that combines the flexibility of an access protocol such as ISMA-DS/CDMA with the ability of a polling mechanism to provide a specific bound for the access delay. This protocol is proposed ... -
A comparison of several recent methods of fundamental frequency and voicing decision estimation
(H. TIMOTHY BRUMMELL, WILLIAM IDSARDI CITATION DELAWARE, NEW CASTLE, DELAWARE, 1996)
Conference report
Open AccessThe authors are interested in the comparison of several kinds of methods for fundamental frequency estimation and GCI (glottal closure instant) detection. These methods operate in various domains (time-, frequency- or joint ... -
A contour matching approach for accurate NOAA-AVHRR image navigation
(Eurasip, 2000)
Conference report
Open AccessAlthough different methods for NOAA AVHRR image navigation have already been established, the multitemporal and multi-satellite character of most studies requires automatic and accurate methods for navigation of satellite ... -
A contribution to video coding using layers
(1998)
Conference report
Open AccessLayered representations of video sequences, originally introduced in [1], are important in several applications. Specifically, they are very appropriate for object tracking, object manipulation, content-based scalability ... -
A cost function for the equalization of constant amplitude signals based on statistical reference
(1996)
Conference report
Open AccessThe equalization of constant amplitude signals is considered in the scope of this paper. A criterion based on the probability density function (pdf) of the signal of interest is proposed. The objective is to derive a ... -
A direct-sequence spread-spectrum super-regenerative receiver
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Conference lecture
Open AccessCurrent applications of the super-regenerative receiver use narrowband modulations. In this paper a new architecture that allows incoherent detection of spread-spectrum signals is presented. A pseudorandom code generator ... -
A discrete-time approach to the steady-state and stability analysis of distributed nonlinear autonomous circuits
(Institute of Electrical and Electronics Engineers (IEEE), 1998)
Conference report
Open AccessWe present a direct method for the steady-state and stability analysis of autonomous circuits with transmission lines and generic nonlinear elements. With the discretization of the equations that describe the circuit in ... -
A discrete-time approach to the steady-state and stability analysis of distributed nonlinear autonomous circuits
(2000-02)
Article
Open AccessWe present a direct method for the steady-state and stability analysis of autonomous circuits with transmission lines and generic non- linear elements. With the discretization of the equations that describe the circuit ... -
A discrete-time equivalent system approach to the periodic response of nonlinear autonomous circuits
(1994)
Conference report
Open AccessThe problem of computing the steady state response of nonlinear autonomous circuits is solved making use of a discrete-time equivalent system approach. With the application of an s-plane to z-plane mapping, the circuit ... -
A Flexible IP Active Network Architecture
(Springer, 2000)
Conference report
Restricted access - publisher's policyThis paper presents the main concepts of the IST Project FAIN “Future Active IP Networks” [10], a three-year collaborative research project, whose main task is to develop and validate an open, flexible, programmable and ... -
A game of billiards with spatial solitary waves in ktp
(1996-03)
Article
Restricted access - publisher's policy -
A generic radio channel emulator to evaluate higher layer protocols in a CDMA system
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Conference report
Open AccessCurrently, we are involved in the standardisation process to specify the next mobile system generation. A wideband code division multiple access (WCDMA) system is considered in most of the region versions. It would be very ... -
A hybrid-arq system for hf channels based on codeword partitioning
(1996-04)
Article
Open AccessA technique by which the codewords of an error-correcting code are partitioned to obtain an error-detecting code with half the original length is described. It is intended to be used in a hybrid-ARQ system for achieving ... -
A mobile controlled algorithm for improving the throughput in a s-aloha ds-cdma system
(Institute of Electrical and Electronics Engineers (IEEE), 1996)
Conference report
Open AccessThis paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic ... -
A morphological approach for segmentation and tracking of human faces
(Barcelona, 2000)
Conference lecture
Open AccessA new technique for segmenting and tracking human faces in video sequences is presented. The technique relies on morphological tools such as using connected operators to extract the connected component that more likely ... -
A near-optimum mac protocol based on the distributed queueing random access protocol (dqrap) for a cdma mobile communication system
(2000-09)
Article
Open AccessThis paper presents and analyses a new near– optimum random access protocol. The proposed access scheme is suitable for a CDMA environment and minimises the total number of spreading codes needed to achieve a certain ...
