Asymptotic analysis of distributed multi-cell beamforming

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Asymptotic analysis of distributed multi-cell beamforming
We consider the problem of multi-cell downlink beamforming with N cells and K terminals per cell. Cooperation among base stations (BSs) has been found to increase the system throughput in a multi-cell set up by mitigating inter-cell interference. Most of the previous works assume that the BSs can exchange the instantaneous channel state information (CSI) of all their user terminals (UTs) via high speed backhaul links. However, this approach quickly becomes impractical as N and K grow large. In this work, we formulate a distributed beamforming algorithm in a multi-cell scenario under the assumption that the system dimensions are large. The design objective is the minimize the total transmit power across all BSs subject to satisfying the user SINR constraints while implementing the beamformers in a distributed manner. In our algorithm, the BSs would only need to exchange the channel statistics rather than the instantaneous CSI. We make use of tools from random matrix theory to formulate ...
Subhash Lakshminaryana, Jakob Hoydis, Mérou
Added 14 Feb 2011
Updated 14 Feb 2011
Type Journal
Year 2010
Authors Subhash Lakshminaryana, Jakob Hoydis, Mérouane Debbah, Mohamad Assaad
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