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A low-complexity version of the offset maximization technique for robust precoding is developed for massive MISO downlink systems. Offset maximization precoding provides sub-stantial robustness under different channel uncertainty models, and can be modified to handle per-antenna power constraints. We also provide an improved power loading technique for any set of beamforming directions. This technique...
This paper develops low-complexity design techniques for robust linear precoders suitable for various multi-cell multiple-input single-output (MISO) downlink systems. The goal is to satisfy pre-specified SINR requirements for users in multiple cells under some base station power constraints, in the absence of perfect channel state information (CSI). First, we consider the case of full cooperation...
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