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This paper investigates the use of a fuzzy method as a tool for model identification of a non linear and multivariable system when the measurement data is available. In fact, the use of fuzzy clustering facilitates automatic generation of Takagi-Sugeno rules and its antecedent parameters. After the determination of the consequent parameters, these are(More)
— This paper quantifies the gain in throughput and Quality of Service (QoS) provided by the EDCA MAC adopted in the current IEEE 802.11e WLAN draft compared to the traditional DCF. In that purpose, an analytical model is developed to compute the throughput in the single and multiuser cases with a non ideal channel. This model is backed with system(More)
—Three dimensional beamforming (3D) (also elevation beamforming) is now gaining a growing interest among researchers in wireless communication. The reason can be attributed to its potential to enable a variety of strategies like sector or user specific elevation beamforming and cell-splitting. Since these techniques cannot be directly supported by current(More)
In this paper, we propose a global exponential adaptive observer for a class of uniformly observable nonlinear systems in order to jointly estimate missing states and unknown constant parameters. This class consists of cascade subsystems where every subsystem is associated with a subset of outputs. Moreover, a full triangular structure is not assumed since(More)
In this paper the capacity of a specific PPM (Pulse Position Modulation) Ultra Wide Band (UWB) system using a semi-digital demodulator architecture is evaluated. Then the impact of time desynchronization between the local pulses templates and the received signal on the capacity of the link is assessed. The goal being to quantify the jitter effect and delay(More)
—Two-way relay channel (TWRC) models a cooperative communication situation performing duplex transmission via a relay station. For this channel, we have shown previously that a lattice-based physical layer network coding strategy achieves, at the limit of arbitrarily large dimension, the same rate as that offered by the random coding-based regular(More)
—A Two-Way Relay Channel (TWRC) in which duplex transmission between two users via a relay station is considered. A physical layer network coding strategy based on compress-and-forward relaying scheme for the TWRC is proposed. In the underlying coding strategy, we use nested lattices for Wyner-Ziv coding and decoding. The relay uses the weaker side(More)