Interference Alignment in Dense Wireless Networks

Details Interference Alignment in Dense Wireless Networks Interference Alignment in Dense Wireless Networks

2009-12-04

arxiv.org/abs/0912.0868v3

IEEE Transactions on Information Theory, vol. 57, pp. 2889-2901, May 2011

Computer Science

Information Theory

21 pages

Scientific paper

We consider arbitrary dense wireless networks, in which $n$ nodes are placed in an arbitrary (deterministic) manner on a square region of unit area and communicate with each other over Gaussian fading channels. We provide inner and outer bounds for the $n\times n$-dimensional unicast and the $n\times 2^n$-dimensional multicast capacity regions of such a wireless network. These inner and outer bounds differ only by a factor $O(\log(n))$, yielding a fairly tight scaling characterization of the entire regions. The communication schemes achieving the inner bounds use interference alignment as a central technique and are, at least conceptually, surprisingly simple.

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