Abstract
In this paper, we propose a new method to design precoder codebook for spatially correlated MIMO channels. Our codebook includes a global and a local component. The codewords in the global component are uniformly distributed on the Grassmann manifold, but those in the local component are designed to center on the statistic of the optimal precoder, based on a rotation matrix codebook. Such a codebook design is applicable in both beamforming and spatial multiplexing systems. Compared with conventional approaches, it achieves good error performance with lower construction complexity.
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