Patent ID: 7289570

Claim:
A method of wireless communication, comprising: (a) estimating at least one eigenvector of a matrix of communication channel coefficients for a channel between a first plurality of antennas and a second plurality of antennas; (b) transmitting using said first plurality of antennas with the relative weightings of baseband signals on said first plurality of antennas corresponding to components of said at least one eigenvector; (c) wherein said communication channel has P coefficients, α ij for i =1, . . . , M and j=1, . . . , N where M and N are positive integers and P equals the product of M multplied by N, and α ij relates to transmission from the ith antenna of a transmitter to the jth antenna of a receiver, and said matrix is CC H where C is the M×N matrix with ith row and jth column entry α ij and H is Hermitian conjugate.