STABILITY INDICATOR FOR A WIRELESS REPEATER
First Claim
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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.
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Abstract
A method for monitoring feedback loop stability in a wireless repeater includes measuring a gain control metric in the feedback loop of the repeater periodically for a given time period where the gain control metric is 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. In operation, a large magnitude of the gain control metric indicates instability in the feedback loop of the repeater.
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Citations
15 Claims
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1. A method for monitoring feedback loop stability in a wireless repeater, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless repeater having a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an output signal, 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 the transmitting antenna, the feedback channel thus forming a feedback loop between the transmitting antenna and the receiving antenna, the output signal being an amplified input signal, the repeater comprising:
a gain control block configured to control a gain of the repeater, the gain control block comprising a gain metric calculator configured to measure 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 repeater, the gain control metric being monitored 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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wireless repeater having a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an output signal, 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 the transmitting antenna, the feedback channel thus forming a feedback loop between the transmitting antenna and the receiving antenna, the output signal being an amplified input signal, the repeater comprising:
means for controlling a gain of the repeater, the means comprising a means for 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 repeater, the gain control metric being monitored 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.
Specification