Near Optimum Power Control and Precoding under Fairness Constraints in Network MIMO Systems

Abstract--We consider the problem of setting the uplink signalto-noise-and-interference (SINR) target and allocating transmit powers for mobile stations in multicell spatial multiplexing wireless systems. Our aim is twofold: to evaluate the potential of such mechanisms in network multiple input multiple output (MIMO) systems, and to develop scalable numerical schemes that allow real-time near-optimal resource allocation across multiple sites. We formulate two versions of the SINR target and power allocation problem: one for maximizing the sum rate subject to power constraints, and one for minimizing the total power needed to meet a sum-rate target. To evaluate the potential of our approach, we perform a semi-analytical study in Mathematica using the augmented Lagrangian penalty function method. We find that the gain of the joint optimum SINR setting and power allocation may be significant depending on the degree of fairness that we impose. We develop a numerical technique, based on suc...

• Type: Journal
• Year: 2010
• Where: IJDMBC
• Authors: Gábor Fodor, Mikael Johansson, Pablo Soldati
• Keywords: IJDMBC 2010, Power Allocation, SINR Targets, Transmit Power