On the Beamforming Design for Efficient Interference Alignment

Details On the Beamforming Design for Efficient Interference Alignment On the Beamforming Design for Efficient Interference Alignment

2009-06-21

arxiv.org/abs/0906.3737v1

Computer Science

Information Theory

3 pages, 1 figure, submitted to IEEE Comm. Letters, Mar. 2009

Scientific paper

An efficient interference alignment (IA) scheme is developed for $K$-user single-input single-output frequency selective fading interference channels. The main idea is to steer the transmit beamforming matrices such that at each receiver the subspace dimensions occupied by interference-free desired streams are asymptotically the same as those occupied by all interferences. Our proposed scheme achieves a higher multiplexing gain at any given number of channel realizations in comparison with the original IA scheme, which is known to achieve the optimal multiplexing gain asymptotically.

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