Overhead-Aware Distributed CSI Selection in the MIMO Interference Channel
Abstract
We consider a MIMO interference channel in which the transmitters and receivers operate in frequency-division duplex mode. In this setting, interference management through coordinated transceiver design necessitates channel state information at the transmitters (CSI-T). The acquisition of CSI-T is done through feedback from the receivers, which entitles a loss in degrees of freedom, due to training and feedback. This loss increases with the amount of CSI-T. In this work, after formulating an overhead model for CSI acquisition at the transmitters, we propose a distributed mechanism to find for each transmitter a subset of the complete CSI, which is used to perform interference management. The mechanism is based on many-to-many stable matching. We prove the existence of a stable matching and exploit an algorithm to reach it. Simulation results show performance improvement compared to full and minimal CSI-T.
Cite
@article{arxiv.1504.06794,
title = {Overhead-Aware Distributed CSI Selection in the MIMO Interference Channel},
author = {Rami Mochaourab and Rasmus Brandt and Hadi Ghauch and Mats Bengtsson},
journal= {arXiv preprint arXiv:1504.06794},
year = {2015}
}
Comments
5 pages, 2 figures. to appear at EUSIPCO 2015, Special Session on Algorithms for Distributed Coordination and Learning