Patent ID: 8199842
Filing Date: 2012-06-12
Classification: H04B,H04L

Abstract:
1. A method for transmitting data in a multiple-input multiple-output (MIMO) communication system comprising: deriving a pulse-shaping matrix based in part on a first sequence of matrices of eigenvectors and a second sequence of matrices of singular values corresponding to an estimated channel response matrix of a MIMO channel, wherein the deriving the pulse-shaping matrix comprises determining the estimated channel response matrix for the MIMO channel and decomposing the estimated channel response matrix to obtain the first sequence of matrices of eigenvectors and the second sequence of matrices of singular values; preconditioning a plurality of modulation symbol streams based on the pulse-shaping matrix to derive a plurality of preconditioned signals; and transmitting the plurality of preconditioned signals over the MIMO channel, wherein the estimated channel response matrix comprises a plurality of eigenmodes, and wherein eigenmodes associated with singular values below a particular threshold are not selected for use for data transmission.