1. A method for modifying a transmit diversity signal by a processor of a mobile subscriber unit device having at least first and second antennas, the method comprising: receiving at least one input parameter from a base station; calculating at least one virtual parameter based on said at least one input parameter; converting said at least one virtual parameter into an actual parameter, wherein said actual parameter corresponds to a value of a transmit diversity parameter; and transmitting a transmit diversity signal by the mobile subscriber unit device, wherein said transmitting comprises transmitting a first signal on the first antenna and transmitting a second signal on the second antenna, the first and second signals differing by said value of the transmit diversity parameter.