Networked MIMO with Clustered Linear Precoding
Abstract
A clustered base transceiver station (BTS) coordination strategy is proposed for a large cellular MIMO network, which includes full intra-cluster coordination to enhance the sum rate and limited inter-cluster coordination to reduce interference for the cluster edge users. Multi-cell block diagonalization is used to coordinate the transmissions across multiple BTSs in the same cluster. To satisfy per-BTS power constraints, three combined precoder and power allocation algorithms are proposed with different performance and complexity tradeoffs. For inter-cluster coordination, the coordination area is chosen to balance fairness for edge users and the achievable sum rate. It is shown that a small cluster size (about 7 cells) is sufficient to obtain most of the sum rate benefits from clustered coordination while greatly relieving channel feedback requirement. Simulations show that the proposed coordination strategy efficiently reduces interference and provides a considerable sum rate gain for cellular MIMO networks.
Cite
@article{arxiv.0808.3971,
title = {Networked MIMO with Clustered Linear Precoding},
author = {Jun Zhang and Runhua Chen and Jeffrey G. Andrews and Arunabha Ghosh and Robert W. Heath},
journal= {arXiv preprint arXiv:0808.3971},
year = {2008}
}
Comments
27 pages, submitted to IEEE Transaction on Wireless Communications