Simultaneous Diagonalization: On the DoF Region of the K-user MIMO Multi-way Relay Channel
Information Theory
2014-04-09 v1 math.IT
Abstract
The K-user MIMO Y-channel consisting of K users which want to exchange messages among each other via a common relay node is studied in this paper. A transmission strategy based on channel diagonalization using zero-forcing beam-forming is proposed. This strategy is then combined with signal-space alignment for network-coding, and the achievable degrees-of-freedom region is derived. A new degrees-of-freedom outer bound is also derived and it is shown that the proposed strategy achieves this outer bound if the users have more antennas than the relay.
Keywords
Cite
@article{arxiv.1404.2081,
title = {Simultaneous Diagonalization: On the DoF Region of the K-user MIMO Multi-way Relay Channel},
author = {Anas Chaaban and Karlheinz Ochs and Aydin Sezgin},
journal= {arXiv preprint arXiv:1404.2081},
year = {2014}
}
Comments
6 pages, accepted for publication in EW 2014