Patent ID: 8630678

Claim:
A communication system comprising: a mobile modifying communication device to transmit a perturbed signal having a transmit diversity parameter perturbed from the parameter's nominal value, wherein said modifying communication device perturbs the signal by modulating the transmit diversity parameter with respect to the nominal value in a first direction for a first feedback interval and modulating the transmit diversity parameter with respect to the nominal value in a second direction for a second feedback interval; wherein a signal quality feedback signal is received at a feedback rate from a feedback communication device receiving said perturbed signal, said feedback signal comprising feedback information relating to receipt of the perturbed signal at the feedback communication device, said signal quality feedback signal being transmitted according to a communication protocol; wherein said mobile modifying communication device further receives said feedback signal, and based at least on said feedback information, adjusts the nominal value of said 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; wherein said feedback information comprises an outcome sequence including at least one feedback value, each said feedback value comprising one or more bits, and wherein said modifying communication device adjusts a nominal value of a transmit diversity parameter by: calculating a grade from the one or more feedback values, the grade indicating a nominal value adjustment; wherein said grade is determined by assigning a predetermined weight Wi to each separate feedback interval i, having a predetermined feedback value F i , said grade G being determined as G=C*Σ(F i *W i ) where C is a predetermined constant and the sum Σ is with respect to a sequence of values of i.