FADLALLAH Yasser^1,2, AISSA EL BEY Abdeldjalil^1,2, AMIS CAVALEC Karine^1,2, PYNDIAH Ramesh^1,2

Communication dans une conférence avec acte

SPAWC 2012: 13th IEEE International Workshop on Signal Processing Advances in Wireless Communications, 17-20 june 2012, Çeşme, Turkey, 2012

2012

Recently, the capacity region of the Single Input Single Output (SISO) fading interference channel has been characterized. Its degree of freedom is upper bounded by K/2. This upperbound can be asymptotically achieved using the Interference Alignment approach (IA), proposed by Cadambe et al.. Our work aims to maximize the network sum rate of the IA scheme through the precoding subspaces design. We propose two designs. One is obtained as a closed-form solution of a constrained optimization problem when a Zero-Forcing decoding scheme is employed. The other is a generalized version of the optimized 3-user beamforming vectors design proposed by Kim et al., where a Minimum Mean Square Error receiver is utilized. This last design presents a high computational complexity compared to the analytical solution obtained assuming a ZF receiver. Simulation results illustrate the data rate performance and highlight the comparison between the different designs.

1 : SC - Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB)
2 : Lab-STICC - Laboratoire en sciences et technologies de l'information, de la communication et de la connaissance (UMR CNRS 6285 - Télécom Bretagne - Université de Bretagne Occidentale - Université de Bretagne Sud)

Interference Alignment

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