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Theses

Développement d'architectures avancées pour communications ultra large bande (UWB) dans des applications bas débit

Abstract : Many applications like sensor networks require a wireless link to transfer data, not necessarily with a high speed rate, but with very low power consumption. The Impulse Radio - Ultra Wideband technology benefits from intrinsic properties that enable to develop low-complexity transceiver solutions. It also takes advantage of the fine temporal resolution that inherently results from the wide available bandwidth, hence providing appealing radiolocation capabilities. For these two main reasons, UWB technologies were strongly supported when the IEEE 802.15.4a task group started defining an alternative physical layer (PHY) for Wireless Personal Area Networks (WPAN). The work presented in this thesis took place in this double context of technological research and standardization, aiming at a low-complexity receiver architecture compliant with the on-going standard. Firstly, UWB signals are characterized and an analytical pulse model is proposed. It takes into account the main PHY parameters entering into the radiated power, such as bandwidth, power spectral density, pulse repetition frequency, etc. The propagation channel influence is then considered. Different statistical studies based on IEEE channel models are proposed, concerning energy repartition, small scale fading, pulse magnitude distribution and correlation properties. Subsequently, the different kinds of receiver architectures are described and compared in terms of performance, complexity, robustness to multi-paths, etc. Finally, the most relevant features of the 802.15.4a standard and the complete solution selected for implementation are detailed, including a synchronization algorithm compliant with IEEE preambles.
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https://pastel.archives-ouvertes.fr/pastel-00003907
Contributor : Ecole Télécom Paristech <>
Submitted on : Friday, April 10, 2009 - 8:00:00 AM
Last modification on : Friday, October 23, 2020 - 4:37:49 PM
Long-term archiving on: : Friday, September 10, 2010 - 12:44:27 PM

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  • HAL Id : pastel-00003907, version 1

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Samuel Dubouloz. Développement d'architectures avancées pour communications ultra large bande (UWB) dans des applications bas débit. domain_other. Télécom ParisTech, 2008. English. ⟨pastel-00003907⟩

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