A method for communicating information in a communication system, the method comprising: transmitting data via a plurality of radio frequency channels (150, 242) utilizing a plurality of transmitting antenna (112, 114, 212, 214, 216); receiving feedback information via at least one of said plurality of RF channels; modifying at least one transmission mode parameter based on said feedback information; characterized in that the method further comprises: receiving said feedback information comprising a reduced data representation of channel estimates based on transmission characteristics of said transmitted data via at least one of said plurality of transmitting antenna; wherein the reduced data representation is derived based on deriving said feedback information from mathematical matrix decomposition of said channel estimates and said reduced data representation of channel estimates comprises the matrices V H and S, wherein V H is the Hermitian transform of the matrix V, wherein the columns of V represent Eigenvectors of a matrix product of a Hermitian transform of a channel estimate matrix with the channel estimate matrix, and wherein the singular values in the matrix S represent the square roots of the Eigenvalues for the channel estimate matrix. transmitting data via a plurality of radio frequency channels (150, 242) utilizing a plurality of transmitting antenna (112, 114, 212, 214, 216); receiving feedback information via at least one of said plurality of RF channels; modifying at least one transmission mode parameter based on said feedback information; characterized in that the method further comprises: receiving said feedback information comprising a reduced data representation of channel estimates based on transmission characteristics of said transmitted data via at least one of said plurality of transmitting antenna; wherein the reduced data representation is derived based on deriving said feedback information from mathematical matrix decomposition of said channel estimates and said reduced data representation of channel estimates comprises the matrices V H and S, wherein V H is the Hermitian transform of the matrix V, wherein the columns of V represent Eigenvectors of a matrix product of a Hermitian transform of a channel estimate matrix with the channel estimate matrix, and wherein the singular values in the matrix S represent the square roots of the Eigenvalues for the channel estimate matrix. receiving said feedback information comprising a reduced data representation of channel estimates based on transmission characteristics of said transmitted data via at least one of said plurality of transmitting antenna; wherein the reduced data representation is derived based on deriving said feedback information from mathematical matrix decomposition of said channel estimates and said reduced data representation of channel estimates comprises the matrices V H and S, wherein V H is the Hermitian transform of the matrix V, wherein the columns of V represent Eigenvectors of a matrix product of a Hermitian transform of a channel estimate matrix with the channel estimate matrix, and wherein the singular values in the matrix S represent the square roots of the Eigenvalues for the channel estimate matrix.