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Algorithmes d'allocation de ressources pour des systèmes à interférence

Abstract : Interference is a phenomenon that is present in many communication systems and is often a serious hindrance to their development. An intelligent management of this phenomenon is thus necessary to limit its negative impact. In this thesis, we addressed three issues related to its presence. In the first part, in order to boost transmission rates in impulse radio ultra-wide band systems, we propose to assign multiple time-hopping codes to the same user. This generates a new type of interference associated with the additional codes allocated to the user of interest. Since the benefit of this type of strategy is not straightforward, we study the impact of our proposition on the system's performance. In the second part, we tackle the problem of optimizing the outage probability of multiple-antenna systems in a slow fading Rician channel. We propose to optimize this probability in the context of N transmit antennas and one single receive antenna, when the signal-to-noise ratio is high, and improve it when there are multiple antennas both at the transmitter and at the receiver. In the last part, we study the problem of power allocation in a Gaussian interference channel. Based on a new approximate expression of this channel's capacity and using an OFDM modulation, we propose to develop a new power allocation algorithm that improves the achievable rates region, compared with a uniform allocation and classic dynamic spectrum management techniques.
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Contributor : Ecole Télécom ParisTech Connect in order to contact the contributor
Submitted on : Monday, February 22, 2010 - 8:00:00 AM
Last modification on : Friday, July 31, 2020 - 10:44:07 AM
Long-term archiving on: : Thursday, March 30, 2017 - 5:10:15 AM


  • HAL Id : pastel-00005795, version 1



Eric Albert Bouton. Algorithmes d'allocation de ressources pour des systèmes à interférence. domain_other. Télécom ParisTech, 2010. Français. ⟨pastel-00005795⟩



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