Communication system and method of data communications

A communication system, comprising:

• an amplifier configured to generate an amplified signal based on a modulated signal;
• and
• a demodulator coupled to the amplifier, and configured to demodulate the amplified signal responsive to a first carrier signal, the demodulator comprising:
• a mixer coupled to the amplifier, and configured to generate a first signal based on the first carrier signal and the amplified signal;
• a filter coupled to the mixer, and configured to generate a filtered first signal based on the first signal, the filter having a gain adjusted based on a set of control signals;
• and
• a gain adjusting circuit coupled to the filter, and configured to generate the set of control signals based on at least a voltage of the filtered first signal, the gain adjusting circuit comprising:
• a first peak detector coupled to the filter, and configured to output a peak value of the voltage of the filtered first signal.

A method of data communications, comprising:

• generating a first carrier signal;
• and
• demodulating a modulated signal responsive to the first carrier signal, thereby generating a demodulated data stream, wherein demodulating the modulated signal comprises:
• generating a first signal based on the first carrier signal and the modulated signal;
• generating, by a filter, a filtered first signal based on the first signal;
• generating a set of control signals based on at least a voltage of the filtered first signal, wherein generating the set of control signals comprises:
• outputting a peak value of the voltage of the filtered first signal;
• and
• adjusting a gain of the filter based on the set of control signals.