Patent ID: 8463176
Filing Date: 2013-06-11
Classification: H04B

Abstract:
1. A method for monitoring feedback loop stability in a wireless repeater, the method comprising: receiving an input signal at a receiving antenna of the repeater, the input signal being a sum of a remote signal to be repeated and a feedback signal resulting from a feedback channel between the receiving antenna and a transmitting antenna, the feedback channel thus forming a feedback loop between the transmitting antenna and the receiving antenna; transmitting an output signal on the transmitting antenna, the output signal being an amplified input signal; measuring a gain control metric in the feedback loop of the repeater periodically for a given time period, the gain control metric being indicative of a loop gain of the feedback loop of the repeater; and monitoring the magnitude of the gain control metric to determine the stability of the feedback loop of the repeater, wherein a large magnitude of the gain control metric indicates instability in the feedback loop of the repeater.