Automatic gain control device, receiver, electronic device, and automatic gain control method

A receiver, comprising:

• an automatic gain control device;
• and
• a demodulator,
• wherein
• the automatic gain control device includes
• an amplifier configured to amplify an input signal based on a gain control signal, and to output an amplified signal,
• a converter configured to convert the amplified signal into a converted signal having a value corresponding to an absolute value of the amplified signal,
• a peak detector configured to
• remove, during a peak detection period, from values of the converted signal, a predetermined number of values which include a maximum value,
• determine a peak level of the converted signal after the removing, and
• output noise position information indicating a timing of impulse noise,
• an error calculator configured to calculate an error between the peak level and a reference signal, and to output the error as an error signal, and
• a gain controller configured to update the gain control signal based on the error signal, and to output an updated gain control signal;
• the demodulator includes a noise canceller, and demodulates the amplified signal, and outputs a demodulated signal;
• and
• the noise canceller removes noise from a signal in the demodulator using the noise position information.

An automatic gain control method, comprising:

• amplifying an input signal by an amplifier based on a gain control signal, and obtaining an amplified signal;
• converting the amplified signal into a converted signal having a value corresponding to an absolute value of the amplified signal;
• removing, during a peak detection period, from values of the converted signal, a predetermined number of values which include a maximum value;
• determining a peak level of the converted signal after the removing;
• calculating an error between the peak level and a reference signal to output the error as an error signal;
• and
• updating the gain control signal based on the error signal.