Beamformer Design with Feedback Rate Constraints : Criteria and Constructions
Mukkavilli, Krishna Kiran
Multiple antennas; MIMO systems; beamforming; quantizer; feedback
In this work, we provide a geometrical framework for the analysis and design of beamformer codebooks with finite number of beamformer vectors. We present a design criterion for good beamfomer codebooks and show the equivalence of the beamformer design problem to two other known problems. First, the beamformer design problem can be directly posed as a problem of packing <b><i>2</i></b> dimensional subspaces in a <b><i>2t</i></b> dimensional Grassmannian manifold, <b><i>t</i></b> being the number of transmit antennas. And second, under certain conditions, the beamformer design problem is equivalent to the construction of unitary space time constellations.
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- ECE Publications