Patent ID: 8615213

Claim:
An apparatus comprising: a signal processing circuit to receive and process an incoming radio frequency (RF) signal to obtain a demodulated signal, the signal processing circuit including a filter, the filter comprising; a first amplifier to receive a downconverted signal obtained from the incoming RF signal, the first amplifier having a first programmable amplification value and to output a first amplifier value; a second amplifier to receive an output of a delay cell, the second amplifier having a second programmable amplification value and to output a second amplifier value; a combiner to sum the first and second amplifier values to generate a filter estimate; and a second combiner to remove the filter estimate from the downconverted signal to output a filtered signal; a quality detector circuit to detect a quality level of the demodulated signal and to output a quality indicator based on at least one of the quality level of the demodulated signal, a quality metric of the incoming RF signal, and a quality metric of a signal within the signal processing circuit; and a controller coupled to the filter, the controller, responsive to the quality indicator, to cause a state of the filter to be stored in a memory coupled to the filter.