OcrV1, Main, Exploration, bibRecord, 000316

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

Identifieur interne : 000316 ( Main/Exploration ); précédent : 000315; suivant : 000317

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

Auteurs : G. Chiurco [Italie] ; M. Mazzotti [Italie] ; F. Zabini [Italie] ; D. Dardari [Italie] ; O. Andrisano [Italie]

Source :

IEEE transactions on broadcasting [ 0018-9316 ] ; 2012.

RBID : Pascal:13-0024772

Descripteurs français

Pascal (Inist)
- Réseau porte programmable, Evaluation performance, Méthode écho impulsion, Réduction bruit, Suppression écho, Télévision numérique, Vidéodiffusion numérique, Répéteur, Reconnaissance optique caractère, Rétroaction, Antenne réceptrice, Apprentissage, Poursuite cible, Méthode moindre carré moyen, Modèle théorique, Taux de réjection, Implémentation, Prototype, Méthode analytique, Traitement signal, Transmission numérique, Reconnaissance forme, Radiodiffusion mobile.
Wicri :
- topic : Prototype.

English descriptors

KwdEn :
- Analytical method, Digital television, Digital transmission, Digital video broadcasting, Echo suppression, Feedback regulation, Field programmable gate array, Implementation, Learning, Least mean squares methods, Mobile broadcasting, Noise reduction, Optical character recognition, Pattern recognition, Performance evaluation, Prototype, Pulse echo method, Receiving antenna, Rejection ratio, Repeater, Signal processing, Target tracking, Theoretical model.

Abstract

The main design issues and performance characterization of an echo canceller for digital on-channel repeaters (OCRs) applicable to multiple standards for communications and broadcasting are addressed. In particular, in this paper we focus on a DVB-T/H scenario. The low-complexity channel cancellation technique here described is based on the introduction of a negative feedback loop capable to counterbalance the coupling effects between the OCR antennas (echoes). In the initial phase, locally generated pulse trains are transmitted to estimate the coupling channel between the transmitting and the receiving antennas. This first echo estimation is used to set-up the canceling unit, whose purpose is to generate a properly filtered replica of the repeated DVB-T/H signal compensating the echoes. After the initial set-up of the system, efficient tracking of the echoes can be performed through conventional least mean square (LMS) techniques. After developing a proper theoretical model, we introduce and discuss some important performance figures such as mean rejection ratio (MRR) and echo suppression at nominal position (ESNP). Then, a detailed description of our implementation of the echo canceller on a field programmable gate array (FPGA) board is reported. Finally, the performance of our prototype is evaluated and the measurement results are compared with those derived by the analytical model.

Affiliations:

Italie

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The main design issues and performance characterization of an echo canceller for digital on-channel repeaters (OCRs) applicable to multiple standards for communications and broadcasting are addressed. In particular, in this paper we focus on a DVB-T/H scenario. The low-complexity channel cancellation technique here described is based on the introduction of a negative feedback loop capable to counterbalance the coupling effects between the OCR antennas (echoes). In the initial phase, locally generated pulse trains are transmitted to estimate the coupling channel between the transmitting and the receiving antennas. This first echo estimation is used to set-up the canceling unit, whose purpose is to generate a properly filtered replica of the repeated DVB-T/H signal compensating the echoes. After the initial set-up of the system, efficient tracking of the echoes can be performed through conventional least mean square (LMS) techniques. After developing a proper theoretical model, we introduce and discuss some important performance figures such as mean rejection ratio (MRR) and echo suppression at nominal position (ESNP). Then, a detailed description of our implementation of the echo canceller on a field programmable gate array (FPGA) board is reported. Finally, the performance of our prototype is evaluated and the measurement results are compared with those derived by the analytical model.</div>
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FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

Source :

Descripteurs français

English descriptors

Abstract

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Le document en format XML

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