Abstract
A method in a WTRU characterized by: determining non-differential precoder feedback information using a Jacobi rotation matrix to perform matrix diagonalization on at least one channel response matrix and one channel correlation matrix associated with an estimate channel and transmitting the non-differential precoder feedback information comprising angular parameters of the Jacobi rotation matrix; determining a differential Jacobi rotation matrix as a function of the Jacobi rotation matrix and an additional correlation matrix associated with a second channel estimate; and determining differential precoder feedback information comprising angular parameters of the differential Jacobi rotation matrix; and transmitting the differential precoder feedback information.
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