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Proposition, modélisation et évaluation d'un réseau SFN-MISO pour l'optimisation de la diffusion TNT au standard DVB-T2

Abstract : The second generation of the Digital Terrestrial Television standard (DVB-T2) called "Digital Video Broadcasting-second generation", was published by ETSI (EN 302,755) in April 2009. This new standard is an extension of the DVB-T which is currently used for the broadcast of digital terrestrial television. The DVB-T2 is intended to meet the requirements of terrestrial broadcasters in order to either offer novel digital services after turning off the analogue TV (several HDTV programs by one multiplex) or improve the indoor portable reception of TVs and embedded receivers in vehicles. Digital Terrestrial Television (DTT) is based on SFN (Single Frequency Network) Networks. More precisely, broadcasting networks based on several transmitters which transmit on the same frequency the similar signal with controlled delays. In addition, the standard DVB-T2 proposes an encoding Space-frequency mechanism of type MISO (Multiple Input Single Output). This method of encoding provides improved performance over SFN based on two transmitters. However, there are few real evaluations of the benefit to use a MISO broadcast based on two antennas, and no evaluations of MISO in SFN network based on three and more transmitters. In this context, the works carred out in this thesis consists of evaluating the performances of the different types of broadcasting modes allowed in the standard DVB-T2. Among the objectives, the different types of networks presented in this manuscript, are to explore as far as possible the contribution of solution MISO Alamouti combined or not with SFN broadcast networks. To achieve that, we have proposed a new modeling of DVB-T2 broadcast networks. Several simulation results for fixed and mobile receptions, and detailed performance analysis of the Alamouti diversity in a Single Frequency Network (SFN) for different numbers of antennas, coding and modulation are obtained. Exploration of the MISO-Tarokh technique is also studied and compared with MISO-Alamouti in order to determine and evaluate networks allowing new methods of deployment, monitoring and diagnostic suitable for efficient fixed and mobile terrestrial broadcasting reception
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/DDOC_T_2012_0398_TORMOS.pdf
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Submitted on : Thursday, March 29, 2018 - 12:34:31 PM
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  • HAL Id : tel-01749958, version 1

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Mokhtar Tormos. Proposition, modélisation et évaluation d'un réseau SFN-MISO pour l'optimisation de la diffusion TNT au standard DVB-T2. Autre. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0398⟩. ⟨tel-01749958⟩

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