Real Interference Alignment and Degrees of Freedom Region of Wireless X Networks

Details Real Interference Alignment and Degrees of Freedom Region of Wireless X Networks Real Interference Alignment and Degrees of Freedom Region of Wireless X Networks

2011-09-13

arxiv.org/abs/1109.2944v1

Computer Science

Information Theory

5 pages, 2 figures

Scientific paper

We consider a single hop wireless X network with $K$ transmitters and $J$ receivers, all with single antenna. Each transmitter conveys for each receiver an independent message. The channel is assumed to have constant coefficients. We develop interference alignment scheme for this setup and derived several achievable degrees of freedom regions. We show that in some cases, the derived region meets a previous outer bound and are hence the DoF region. For our achievability schemes, we divide each message into streams and use real interference alignment on the streams. Several previous results on the DoF region and total DoF for various special cases can be recovered from our result.

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