Aligned Interference Neutralization and the Degrees of Freedom of the 2x2x2 Interference Channel
Information Theory
2010-12-13 v1 math.IT
Abstract
We show that the 2x2x2 interference channel, i.e., the multihop interference channel formed by concatenation of two 2-user interference channels achieves the min-cut outer bound value of 2 DoF, for almost all values of channel coefficients, for both time-varying or fixed channel coefficients. The key to this result is a new idea, called aligned interference neutralization, that provides a way to align interference terms over each hop in a manner that allows them to be cancelled over the air at the last hop.
Keywords
Cite
@article{arxiv.1012.2350,
title = {Aligned Interference Neutralization and the Degrees of Freedom of the 2x2x2 Interference Channel},
author = {Tiangao Gou and Syed A. Jafar and Sang-Woon Jeon and Sae-Young Chung},
journal= {arXiv preprint arXiv:1012.2350},
year = {2010}
}