Patent ID: 8009622

Claim:
A communication method for use in a wireless communications network comprising at least one cell in which a base station is arranged to communicate with at least one user terminal through a wireless interface, said method comprising: monitoring at least one property representative of the channel variability in time and/or frequency, for at least one channel in the cell used to communicate with said at least one user terminal; using the result of the monitoring to control, the communication in the cell; wherein the control of the communication in the cell includes artificially inducing time selectivity and/or frequency selectivity in the communication in said at least one channel in the cell by choosing one or more antenna weight functions for a plurality of transmit antennas; transmitting one or more pilot signals over the transmit antennas for use by a receiver in estimating conditions of the at least one channel, wherein a number of unique pilot signals transmitted is less than a number of transmit antennas used; and transmitting a common signal over said at least one channel using the transmit antennas, wherein the common signal is weighted in accordance with the chosen antenna weight functions.