Patent ID: 7123942
Filing Date: 2006-10-17
Classification: H04B

Abstract:
1. A method for controlling transmission from a first radio station having N transmission antennas to a second radio station, N being a number larger than 2, comprising the following steps: broadcasting M beacon signals from the first station, M being a number larger than 1 and smaller than N, each beacon signal being associated with a distribution vector with N components and being applied to each of the N antennas after weighting by a corresponding component of the associated distributor vector; evaluating the reception of the M beacon signals by the second station, so as to determine feedback data communicated to the first station; causing the distribution vectors associated with the M beacon signals to vary over time; processing the feedback data successively received by the first station so as to determine a respective weighting coefficient for each of the N antennas; and transmitting a dedicated radio signal from the first station destined for the second station, the said dedicated signal being applied to each of the N transmission antennas after weighting by the coefficient determined for the said antenna.