Patent ID: 8363745

Claim:
A method for transmitting radio signals, including the following steps: from a transmit device: a) applying first and second pluralities of streams of symbol signals on a first plurality and a second plurality of transmit antennas, respectively, the first plurality of transmit antennas having a same first polarization and the second plurality of transmit antennas having a same second polarization orthogonal to said first polarization, in a receive device: b) receiving at least one of the streams of the first plurality and at least one of the streams of the second plurality using together third and fourth pluralities of receive antennas providing third sets and fourth sets of receive signals, respectively, the third plurality of receive antennas having a same third polarization and the fourth plurality of receive antennas having a same fourth polarization orthogonal to said third polarization, c) projecting at least one pair of receive signals belonging to said third and fourth sets, respectively, on a same reference axis for defining a composite signal, d) estimating a quality of the composite signal based on a predetermined quality criterion, e) rotating the reference axis and determining a correction angle, relating to a first of said receive signals, corresponding to an optimum value of said quality, for which an interference effect of an alignment mismatch between the transmit antennas and the respective receive antennas is at a minimum, wherein the composite signal is considered as being upgraded into a first eigen vector signal representing a first one of two related transmit signals, and f) carrying out a correction action in any one of said devices, for canceling said interference effect, based on said correction angle.