Joint Optimization of Power Allocation and Training Duration for Uplink Multiuser MIMO Communications

TL;DR

This paper optimizes power allocation and training duration in uplink MU-MIMO systems to maximize sum rate, considering practical power constraints and two linear processing schemes, MRC and ZF.

Contribution

It introduces a joint optimization framework for training duration and power allocation in uplink MU-MIMO, enhancing system throughput.

Findings

Optimal training duration and power allocation improve sum rate.

Joint optimization outperforms fixed schemes.

Results applicable to practical power constraints.

Abstract

In this paper, we consider a multiuser multiple-input multiple-output (MU-MIMO) communication system between a base station equipped with multiple antennas and multiple mobile users each equipped with a single antenna. The uplink scenario is considered. The uplink channels are acquired by the base station through a training phase. Two linear processing schemes are considered, namely maximum-ratio combining (MRC) and zero-forcing (ZF). We optimize the training period and optimal training energy under the average and peak power constraint so that an achievable sum rate is maximized.