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2010
Conference Paper
Titel
On base station coordination in the LTE downlink with limited feedback
Abstract
We discuss the potential gains in system performance and the overall stability of different transmit and feedback strategies under LTE relevant limitations. It is evinced that conventional CoMP schemes are dramatically sensitive to channel uncertainties at the transmitters. The Rate Approximation scheme originally introduced for single cell systems is extended to multicellular systems and shown to be enormously robust under minimal feedback rates. We show that incorporating estimates of the out-of cell interference in the feedback message significantly improve the performance of multicellular systems. Moreover, we show that accurate approximates of the per user rates at the base station are of inestimable value if link adaption is considered.
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