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In this paper, we consider suboptimal cooperative downlink beamforming strategies to maximize the user sum rate in a clustered multicell system with limited feedback. We decouple the problem into multiple independent subproblems through the uplink–downlink duality theorem. Semidefinite relaxation is applied to transform the original nonconvex problem into a convex semidefinite programming problem,...
In this paper, we propose a novel coordinated downlink beamforming strategy based on the semidefinite relaxation (SDR) approach for a clustered multicell cellular system. As base station (BS) cooperation can provide significant performance improvement for the system capacity and interference suppression, we divide the whole network into a number of clusters. In each cluster, several BSs share the...
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