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PIMRC
2008
IEEE

Opportunistic interference alignment in MIMO interference channels

8 years 9 months ago
Opportunistic interference alignment in MIMO interference channels
Abstract—We present two interference alignment techniques such that an opportunistic point-to-point multiple input multiple output (MIMO) link can reuse, without generating any additional interference, the same frequency band of a similar pre-existing primary link. In this scenario, we exploit the fact that under power constraints, although each radio maximizes independently its rate by water-filling on their channel transfer matrix singular values, frequently, not all of them are used. Therefore, by aligning the interference of the opportunistic radio it is possible to transmit at a significant rate while insuring zero-interference on the pre-existing link. We propose a linear pre-coder for a perfect interference alignment and a power allocation scheme which maximizes the individual data rate of the secondary link. Our numerical results show that significant data rates are achieved even for a reduced number of antennas.
Samir Medina Perlaza, Mérouane Debbah, Sams
Added 01 Jun 2010
Updated 01 Jun 2010
Type Conference
Year 2008
Where PIMRC
Authors Samir Medina Perlaza, Mérouane Debbah, Samson Lasaulce, Jean-Marie Chaufray
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