A target amplitude for an acquisition gain-loop is determined. A tracking gain-loop is configured to adjust a gain of the tracking gain-loop during a data portion of the received signal, wherein the received signal comprises an acquisition portion and the data portion. An acquisition gain-loop is configured to adjust a gain of the acquisition gain-loop during the acquisition portion of the received signal. A detector is configured to detect in the data portion an occurrence of a pattern identical to a portion of the acquisition portion. An amplitude estimation block is configured to compute an amplitude estimate based at least in part on the detected portion. A target amplitude updating block is configured to update the target amplitude based at least in part on the amplitude estimate.