On imperfect CSI for the downlink of a two-tier network

Abstract

In this paper, we consider a hierarchical two-tier cellular network where a macrocell is overlaid with a tier of randomly distributed femtocells. We evaluate the combined effect of uncoordinated cross-tier interference, feedback delay, and quantization errors on the achievable rate of transmit beamforming with imperfect channel state information (CSI). We… (More)
DOI: 10.1109/ISIT.2011.6034189

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