Patent ID: 7373117

Claim:
A method for controlling a radio frequency (RF) transmitter, the method comprising: using an integrating controller to produce a reference value of a first quality measure from a first error signal wherein the first error signal is based on a reference value of a second quality measure and an estimated value of the second quality measure, wherein the integrating controller is one of a proportional integrating (PI) controller having the transfer function: SIR r = e * ⁢ K + 1 s ⁢ ( e * ⁢ K T i + e s T t ) in which SIR r is the reference value of the first quality measure, e is the error in quality measure, K is a constant, e s is the tracking signal and T i and T t are time constants relating to the integration and tracking unit respectively, or a proportional integrating derivative (PID) controller; producing an estimated value of the first quality measure relating to an actual value of the first quality measure; and supplying a tracking signal related to the estimated value of the first quality measure and the reference value of a first quality measure to the integrating controller.