CPC H04B 7/0663 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0626 (2013.01); H04L 1/1614 (2013.01)] | 20 Claims |
1. A method comprising:
selecting, by a user equipment, a subset of linear combination coefficients from a two-dimensional matrix having columns of frequency domain components and rows of spatial beams components for channel state information determination, wherein the number of linear combination coefficients in the subset is less than all of the linear combination coefficients;
determining a compression matrix comprising frequency components, wherein the compression matrix comprises information associated with column indices of the selected subset of linear combination coefficients, and the compression matrix excludes the index of the column with lowest index of the two-dimensional matrix;
determining compressed channel state information which comprises (i) locations of the subset of linear combination coefficients in the two-dimensional matrix, (ii) corresponding values of the linear combination coefficients at those locations, wherein the linear combination coefficients at those locations comprises linear combination coefficients associated with the column with lowest index of the two-dimensional matrix, and (iii) the compression matrix; and
reporting, from the user equipment toward a base station, the compressed channel state information.
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