Transmitter and Precoding Order Optimization for Nonlinear Downlink Beamforming
Information Theory
2007-07-13 v1 math.IT
Abstract
The downlink of a multiple-input multiple output (MIMO) broadcast channel (BC) is considered, where each receiver is equipped with a single antenna and the transmitter performs nonlinear Dirty-Paper Coding (DPC). We present an efficient algorithm that finds the optimum transmit filters and power allocation as well as the optimum precoding order(s) possibly affording time-sharing between individual DPC orders. Subsequently necessary and sufficient conditions for the optimality of an arbitrary precoding order are derived. Based on these we propose a suboptimal algorithm showing excellent performance and having low complexity.
Cite
@article{arxiv.cs/0702122,
title = {Transmitter and Precoding Order Optimization for Nonlinear Downlink Beamforming},
author = {Thomas Michel and Gerhard Wunder},
journal= {arXiv preprint arXiv:cs/0702122},
year = {2007}
}
Comments
Submitted to IEEE Int. Symposium on Inf. Theory (ISIT) 2007