Method and user equipment for transmitting precoding matrix information, and method and base station for configuring precoding matrix
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United States of America Patent
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Jun 18, 2013
Grant Date -
Sep 8, 2011
app pub date -
Mar 7, 2011
filing date -
Mar 8, 2010
priority date (Note) -
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Abstract
An apparatus and method for a precoding matrix are disclosed. A codebook used for selecting a precoding matrix is comprised of m subgroups each including n precoding matrices. A user equipment indicates a specific precoding matrix selected from the codebook by transmitting to a base station a first codebook index indicating one of the m subgroups and a second codebook index indicating one of n precoding matrices in a subgroup. The base station configures the specific precoding matrix from the codebook based on the first and second codebook indexes.
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