Patent ID: 7792207

Claim:
A method for a first communication device to communicate with a second communication device over a communication link, the first communication device having a plurality of antenna elements, the method comprising: receiving a power control signal from the second communication device representative of the signal power received at the second communication device, wherein the power control signal is a power-up signal or a power-down signal; receiving a data signal for transmission; generating a pre-transmission signal for each antenna element from the data signal; if a pre-determined sequence of power control signals is received indicating that the signal power received at the second communication device is substantially in a steady state, adjusting either one or both of a relative phase rotation and a power ratio of the pre-transmission signals, wherein the pre-determined sequence of power control signals includes a consecutive sequence of at least one power-up and one power-down signal; and transmitting each of the adjusted pre-transmission signals from the plurality of antenna elements.