Patent ID: 8150441

Claim:
A method for modifying a signal transmitted from a mobile modifying communication device to a feedback communication device, comprising: perturbing in the mobile modifying communication device a transmit diversity parameter from its nominal value at a perturbation rate by modulating the transmit diversity parameter with respect to the nominal value in a first direction for a first feedback interval and then modulating the transmit diversity parameter with respect to the nominal value in a second direction for a second feedback interval; receiving from the feedback communication device a signal quality feedback signal according to a communication protocol, the feedback signal including feedback information relating to the quality of the perturbed signal as received at said feedback communication device; and based at least on said feedback information, adjusting at the mobile modifying communication device the nominal value of the transmit diversity parameter, wherein said transmit diversity parameter comprises a parameter selected from a group consisting of: relative phase, relative amplitude, relative power, and timing of said signal.