Outage rate regions for the MISO IFC

Authors:
Johannes Lindblom;Eleftherios Karipidis;Erik G. Larsson
Affiliations:
Communication Systems Division, Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden;Communication Systems Division, Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden;Communication Systems Division, Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden
Venue:
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Year:
2009

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Abstract

We consider the two-user multiple-input single-output (MISO) interference channel (IFC) and assume that the receivers treat the interference as additive Gaussian noise. We study the rates that can be achieved in a slow-fading scenario, allowing an outage probability. We introduce three definitions for the outage region of the IFC. The definitions differ on whether the rates are declared in outage jointly or individually and whether there is perfect or statistical information about the channels. Even for the broadcast and the multiple-access channels, which are special cases of the IFC, there exist several definitions of the outage rate regions. We provide interpretations of the definitions and compare the corresponding regions via numerical simulations. Also, we discuss methods for finding the regions. This includes a characterization of the beamforming strategies, which are optimal in the sense that achieve rate pairs on the Pareto boundary of the outage rate region.