Distributed Interference Cancellation in Multiple Access Channel with Transmitter Cooperation
Abstract
We consider a two-user Gaussian multiple access channel with two independent additive white Gaussian interferences. Each interference is known to exactly one transmitter non-causally. Transmitters are allowed to cooperate through finite-capacity links. The capacity region is characterized to within 3 and 1.5 bits for the stronger user and the weaker user respectively, regardless of channel parameters. As a by-product, we characterize the capacity region of the case without cooperation to within 1 and 0.5 bits for the stronger user and the weaker user respectively. These results are based on a layered modulo-lattice transmission architecture which realizes distributed interference cancellation.
Cite
@article{arxiv.1009.4269,
title = {Distributed Interference Cancellation in Multiple Access Channel with Transmitter Cooperation},
author = {I-Hsiang Wang},
journal= {arXiv preprint arXiv:1009.4269},
year = {2010}
}
Comments
Extended version of a 5-page conference paper submitted to ICC 2011