Patent ID: 8688066

Claim:
A receiver comprising: an antenna configured to receive a set of signals including a first signal and a second signal having a first relative difference in amplitudes; a low-noise amplifier (LNA) coupled to the antenna, wherein the LNA is configured to receive the set of signals from the antenna and amplify the set of signals to generate a set of amplified signals; a down-conversion mixer coupled to the LNA, wherein the down-conversion mixer is configured to receive the set of amplified signals from the LNA and down convert the set of amplified signals to baseband frequencies; a first filter coupled to the down-conversion mixer, wherein the filter is configured to receive the set of amplified signals at the baseband frequencies from the down-conversion mixer and filter from the set of amplified signals the second signal; a second filter coupled to the first filter, wherein the second filter is configured to receive the set of amplified signals at the baseband frequencies subsequent to filtering by the first filter and reverse the filtering of the first filter, such that the first signal and the second signal at the baseband frequencies have a second relative difference in amplitudes that is substantially similar to the first relative difference in amplitudes; a peak detector coupled to the second filter, wherein the peak detector is configured to receive the set of amplified signals at the baseband frequencies from the second filter and determine whether the LNA is operating at saturation; and an automatic-gain controller coupled to the peak detector and configured to receive a signal from the peak detector for controlling a gain of the LNA.