Patent ID: 7366265

Claim:
In a system for receiving a composite information modulated carrier signal comprising a main signal modulated carrier component which travels a direct path to said receiving system and a multipath signal modulated carrier component which travels a reflected path to said receiving system, including a demodulator chain having adaptive circuitry controllable in response to a control signal to compensate for the multipath component, a control signal generator, comprising: a phase error estimator, for generating a phase error signal representing an estimate of the phase error between the information modulated composite carrier signal and the main signal modulated carrier component; and a controller, responsive to the phase error signal ,for generating said control signal wherein said controller comprises: a frequency analysis circuit responsive to said phase error signal for generating frequency components representing the magnitudes of the phase error signal at each of a plurality of respective frequencies; an analysis circuit for comparing frequency components of said phase error signal to threshold values; and a control circuit responsive to said comparison for generating said control signal.