Automatic gain control with out of band blocking signal compensation
AssigneeStarkey Laboratories, Inc.
InventorJeffrey Paul Solum
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Abstract
One embodiment of the present subject matter includes a method of receiving an input signal. The method, in various embodiments, includes detecting a peak of the input signal and detecting an envelope of the input signal. In various embodiments, the peak and envelope are used to identify out-of-band blocking signals and to adjust gain control. The method also includes comparing the peak to a first threshold Tp and comparing the envelope to a second threshold Te. In the method, if the peak is above the first threshold and the envelope is below the second threshold, then ignoring the input signal. If the envelope is above the second threshold, the method includes applying automatic gain control to decode information encoded in the input signal.
Claims20
A wireless communication system for receiving an input signal, comprising:
- an amplifier configured to amplify the input signal;
- a peak detector configured to detect a peak of the input signal;
- a received signal strength indicator (RSSI) configured to process the input signal to detect a signal of interest;
- and
- a processor configured to adjust gain of the amplifier based on received outputs of the peak detector and the RSSI, and configured to recognize an out of band blocking signal,
- wherein the RSSI is set at a level sufficient to exceed a noise floor, and wherein the peak detector is set at a point at which a desired signal is affected by nonlinearity of gain compression from an out of band interferer.
A device for radio frequency communications, the device comprising:
- an antenna configured to receive incoming radio signals;
- a timer;
- a power supply connected to the timer;
- receiver electronics connected to the antenna, the timer, and the power supply, the receiver electronics including a peak detector and a received signal strength indicator (RSSI), wherein the receiver electronics are adapted to recognize an out of band blocking signal based on outputs from the peak detector and the RSSI, wherein the RSSI is set at a level sufficient to exceed a noise floor, and wherein the peak detector is set at a point at which a desired signal is affected by nonlinearity of gain compression from an out of band interferer.
Dependencies are inferred from the claim text.