Circuit, Use, and Method for Controlling a Receiver Circuit

A method comprising:

• generating a complex baseband signal from a received signal;
• determining a phase difference between a phase of the complex baseband signal and a phase precalculated from previous sampled values;
• comparing the phase difference with a first threshold;
• determining a number by counting exceedances of the first threshold by the phase difference;
• comparing the number of the counted exceedances with a second threshold;
• and
• turning off a receiver circuit if the number of counted exceedances exceeds the second threshold within a time period.

A circuit comprising:

• a receiver circuit configured to receive a modulated signal;
• a control unit configured to control the receiver circuit, the receiver circuit configured to output a phase difference between a phase of a complex baseband signal and a phase precalculated from previous sampled values;
• and
• an evaluation circuit, which for evaluating the phase difference is connectable to the receiver circuit and the control unit, the evaluation circuit being configured to compare the phase difference with a first threshold and configured to output an output signal based on a number of exceedances of the first threshold by the phase difference, wherein the control unit is configured to turn off the receiver circuit based on the output signal of the evaluation circuit.

An apparatus, comprising:

• circuitry configured to:
• receive a modulated signal;
• output a phase difference between a phase of a complex baseband signal and a phase precalculated from previous sampled values;
• compare the phase difference with a first threshold;
• increment a counter in response to determining that the phase difference exceeds the first threshold;
• compare an output of the counter with a second threshold;
• and
• turn off a receiver circuit in response to determining that the output of the counter exceeds the second threshold.