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Abstract: A clustered base transceiver station BTS coordination strategy is proposedfor a large cellular MIMO network, which includes full intra-clustercoordination to enhance the sum rate and limited inter-cluster coordination toreduce interference for the cluster edge users. Multi-cell blockdiagonalization is used to coordinate the transmissions across multiple BTSs inthe same cluster. To satisfy per-BTS power constraints, three combined precoderand power allocation algorithms are proposed with different performance andcomplexity tradeoffs. For inter-cluster coordination, the coordination area ischosen to balance fairness for edge users and the achievable sum rate. It isshown that a small cluster size about 7 cells is sufficient to obtain most ofthe sum rate benefits from clustered coordination while greatly relievingchannel feedback requirement. Simulations show that the proposed coordinationstrategy efficiently reduces interference and provides a considerable sum rategain for cellular MIMO networks.

Autor: Jun Zhang, Runhua Chen, Jeffrey G. Andrews, Arunabha Ghosh, Robert W. Heath Jr


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