SINR Balancing for the Multi-User Downlink under General Power Constraints

Abstract—We address the problem of maximizing the minimum signal to interference and noise ratio of individual users via linear precoding in a multiuser downlink channel with multiple antennas at the transmitter and single antenna receivers. While previous research aimed at optimizing transmission under a total power constraint over all antennas, we provide a framework for solving the optimization under power constraints per arbitrary groups of antennas. The results include power constraints per antenna as well as a sum-power constraint as special cases. The scenario is motivated by recent interest in so called networkMIMO techniques where mobile terminals may be served by multiple base stations subjected to individual power constraints.

• Type: Conference
• Year: 2008
• Where: GLOBECOM
• Authors: Albrecht J. Fehske, Fred Richter, Gerhard Fettweis
• Keywords: GLOBECOM 2008, Individual Power Constraints, Power Constraints, Telecommunications , Total Power Constraint