Abstract
Apparatus and method of generating a long term evolution (LTE) codebook and performing rank overriding are disclosed. Reordering rules are presented whereby a second column vector of each rank-4 precoding matrix will not appear in column vectors of a rank-3 precoding matrix and the first column vector of each rank-4 precoding matrix is identical to the first column vector of the corresponding rank-3 precoding matrix. Furthermore precoder hopping between two precoding matrices corresponding to a particular precoding matrix index (PMI) is implemented whereby a first one of the two precoding matrices comprises a first subset of column vectors of an original precoding matrix that corresponds to the particular PMI and a second one of the two precoding matrices comprises a second subset of column vectors of the original precoding matrix. The precoder hopping is performed in time and/or frequency domain.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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