Patent ID: 8849222

Claim:
A method of transmitting a diversity signal by a mobile wireless communication device, comprising: transmitting an initial diversity signal using an initial value of a phase parameter; receiving a current phase feedback signal from a base station, said current phase feedback indicating a current phase parameter; calculating a modified value of a phase parameter, said modified value being between the initial value of the phase parameter and the current phase parameter value indicated by the current phase feedback signal; transmitting a modified diversity signal using said modified value of the phase parameter; determining a proportion of phase feedback changes among a plurality of phase feedback signals received in a time period by comparing each phase feedback signal in said plurality of phase feedback signals to a succeeding phase feedback signal, determining a number of phase feedback signals that are different from the succeeding phase feedback signal; and dividing by the number of phase feedback signals in said plurality of phase feedback signals, and determining, based on the proportion, whether to calculate said modified value of the phase parameter.