Interference Reduction on Cellular Networks With Large Antenna Arrays

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Provided by: University of Teramo
Topic: Mobility
Format: PDF
In this paper, the authors analyze the behavior of the downlink of a cellular network as the number of its base station antennas tends to infinity. In this case, additive noise vanishes. Nonetheless, the fact that multiple users in different cells transmit non-orthogonal pilot sequences results in the contamination of their channel estimates. As a consequence, base stations transmit beamforming vectors containing components that point towards users in other cells, causing interference that persists even as the number of transmit antennas grows.
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