On Base Station Cooperation Schemes for Downlink Network MIMO Under a Constrained Backhaul

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Executive Summary

Next generation mobile communications systems will most likely employ multi-cell cooperative signal processing schemes, often referred to as network MIMO, as these are known to effectively combat inter-cell interference and improve system fairness and spectral efficiency. A major downside of such schemes is, however, the large extent of backhaul infrastructure required for the information exchange between cooperating base stations. In this paper, the authors observe a cooperative downlink transmission from two base stations to two terminals under different extents of available backhaul capacity. They adapt some well-known concepts from the Gaussian interference channel and observe a variety of possible cooperation schemes.

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