Patent ID: 6915112

Claim:
A method comprising: receiving a signal strength indicator that indicates a power level of a coupled signal from a local wireless transmitter at a local wireless receiver; and tuning an active cancellation circuit to reduce the signal strength indicator, said active cancellation circuit to generate a cancellation signal to combine with the coupled signal at the local wireless receiver, wherein the tuning the active cancellation control signal further comprises: measuring a first level of the signal strength indicator; adjusting an active cancellation control signal in a first direction; measuring a second level of the signal strength indicator; further adjusting the active cancellation control signal in the first direction if the second level is lower than the first level; and adjusting the active cancellation control signal in an opposite direction if the second level is higher than the first level; and iteratively measuring the signal strength indicator and either further adjusting the active cancellation control signal or adjusting the active cancellation control signal in the opposite direction depending on a comparison of a current measurement of the signal strength indicator and a previous measurement of the signal strength indicator; wherein the active cancellation control signal locks after adjustment of the active cancellation control signal has switched directions at least twice.