Patent ID: 7130580
Filing Date: 2006-10-31
Classification: H04L

Abstract:
1. A method of transmitting signals from a transmitter comprising three or more antennas in a wireless telecommunications network, comprising: space-time block encoding at least one data sequence; applying to the data sequence a linear transformation dependent upon knowledge of correlation among the antennas to at least partially compensate the transmitted signals for said correlation, wherein the linear transformation depends on the eigenvalues of an antenna correlation matrix and a ratio of symbol energy to noise variance; and transmitting the encoded and transformed data sequence; wherein the linear transformation further depends on the eigenvectors of the antenna correlation matrix; wherein: the transmitter has M antennas where M is an integer greater than two, the channel correlation matrix has M eigenvalues, denoted λ E the method further comprises calculating values of parameters and the linear transformation is determined from these values and from the eigenvectors (w